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Jafari A, Azarfar A, Ghorbani GR, Mirzaei M, Khan MA, Omidi-Mirzaei H, Pakdel A, Ghaffari MH. Corrigendum to "Effects of physical forms of starter and milk allowance on growth performance, ruminal fermentation, and blood metabolites of Holstein dairy calves" (J. Dairy Sci. 103:11300-11313). J Dairy Sci 2021; 104:2463. [PMID: 33453804 DOI: 10.3168/jds.2021-104-2-2463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Jafari A, Azarfar A, Ghorbani GR, Mirzaei M, Khan MA, Omidi-Mirzaei H, Pakdel A, Ghaffari MH. Effects of physical forms of starter and milk allowance on growth performance, ruminal fermentation, and blood metabolites of Holstein dairy calves. J Dairy Sci 2020; 103:11300-11313. [PMID: 33222852 DOI: 10.3168/jds.2020-18252] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 06/30/2020] [Indexed: 11/19/2022]
Abstract
A 2 × 2 factorial study was conducted to evaluate the effects of milk allowance and physical forms of starter on growth performance, ruminal fermentation, and blood metabolites of Holstein dairy calves. A total of 48 calves [40.4 ± 1.55 kg of body weight (BW), n = 12 per treatment: 6 males and 6 females] were randomly assigned to 1 of the 4 treatments: (1) calves fed low milk allowance and finely ground (FG) starter feed [low-FG; 1.47 ± 2.12-mm geometric mean particle size (GMLP)], (2) calves fed low milk allowance and textured (TS) starter feed [low-TS, includes steam-flaked grains (corn and barley) with a pelleted supplement, GMLP 4.15 ± 1.77 mm], (3) calves fed high milk allowance and FG starter feed (high-FG); and (4) calves fed high milk allowance and TS starter feed (high-TS). The starter diets were blended with 7% of chopped alfalfa hay as a proportion of diet dry matter (DM). No milk refusal was observed in any treatments, and calves on both treatments were weaned from milk by wk 8 of the study using a gradual weaning procedure. We observed no interaction between milk allowance and physical forms of starter on feed intake, average daily gain, feed efficiency, BW, and structural growth. Calves fed high milk allowance had lower starter feed intake but greater feed efficiency and overall BW compared with those fed low allowance. Total DM intake and average daily gain were not different among treatments. Regardless of the physical form of starter feed, hip height, heart girth, the molar proportion of ruminal acetate, acetate to propionate ratio, plasma cholesterol, and high-density lipoprotein were greater, but ruminal total volatile fatty acids, the molar proportion of propionate, and plasma β-hydroxybutyrate were lower in calves fed high milk allowance compared with those fed low allowance. Regardless of the milk allowance, calves fed the FG starter feeds had greater blood urea nitrogen concentrations compared with calves fed the TS starter diets. In conclusion, both forms of the starter feeds can be used when calves are fed high milk allowance with no negative effect on their performance.
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Affiliation(s)
- A Jafari
- Department of Animal Science, Faculty of Agriculture, Lorestan University, PO Box 465, Khorramabad, 68151-44316, Iran
| | - A Azarfar
- Department of Animal Science, Faculty of Agriculture, Lorestan University, PO Box 465, Khorramabad, 68151-44316, Iran.
| | - G R Ghorbani
- Department of Animal Science, College of Agriculture, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - M Mirzaei
- Department of Animal Science, Faculty of Agriculture and Natural Resources, Arak University, Arak 38156-88349, Iran
| | - M A Khan
- AgResearch Ltd., Grasslands Research Centre, Private Bag 11008, Palmerston North 4474, New Zealand
| | - H Omidi-Mirzaei
- Animal Science Research Department, Isfahan Agricultural and Natural Resources Research and Education Center, AREEO, Isfahan, Iran
| | - A Pakdel
- Department of Animal Science, Isfahan Agricultural and Natural Resources Research and Education Center, AREEO, Isfahan, Iran
| | - M H Ghaffari
- Institute of Animal Science, University of Bonn, 53111 Bonn, Germany
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Ahmadpanah J, Ghavi Hossein-Zadeh N, Shadparvar AA, Pakdel A. Genetic parameters of body weight and ascites in broilers: effect of different incidence rates of ascites syndrome. Br Poult Sci 2017; 58:32-39. [DOI: 10.1080/00071668.2016.1257111] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- J. Ahmadpanah
- Department of Animal Science, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran
| | - N. Ghavi Hossein-Zadeh
- Department of Animal Science, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran
| | - A. A. Shadparvar
- Department of Animal Science, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran
| | - A. Pakdel
- Department of Animal Science, College of Agriculture, Isfahan University of Technology, Isfahan 84156-83111, Iran
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Beiki H, Reecy JM, Pakdel A, Javaremi AN, Nejad AM. P3040 Large-scale gene co-expression network as a source of functional annotation for bovine genes. J Anim Sci 2016. [DOI: 10.2527/jas2016.94supplement472a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Morammazi S, Masoudi AA, Vaez Torshizi R, Pakdel A. Changes in the Expression of the Prolactin Receptor (PRLR) Gene in Different Physiological Stages in the Mammary Gland of the Iranian Adani Goat. Reprod Domest Anim 2016; 51:585-90. [PMID: 27333814 DOI: 10.1111/rda.12723] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Accepted: 05/29/2016] [Indexed: 01/28/2023]
Abstract
The actions of prolactin hormone are mediated by prolactin receptor (PRLR), and proliferation and differentiation of secretory mammary epithelium are dependent on the presence of its receptors. To understand the PRLR expression pattern in mammary gland of dairy goat during different lactation stages, in this study, we first estimated the milk yield breeding value by multitrait random regression model and then compared the expression of the gene in different physiological stage of mammary gland between high- and low-breeding value groups. We assayed the transcription level of the gene by quantitative real-time PCR method, and its outcomes were analysed by a statistical model containing breeding value groups, sampling times and their interactions as fixed effects. The results indicated that the expression levels of PRLR gene were significantly upregulated in the drying stage (p < 0.01). The transcription pattern of the gene was significantly different between the two breeding value groups (p < 0.01), so that the amount of PRLR mRNA was significantly higher in the low-breeding value groups of animals in the lactation stage (p < 0.01). Based on the results of this study, it could be suggested that the abundance of PRLR transcripts in mammary gland of goat might be changed by some physiological, environmental and genetic factors. Nucleotide variations in the promoter region might be resulted in various transcription activities of the gene which should be studied in a complementary research.
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Affiliation(s)
- S Morammazi
- Department of Animal Science, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran
| | - A A Masoudi
- Department of Animal Science, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran
| | - R Vaez Torshizi
- Department of Animal Science, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran
| | - A Pakdel
- Department of Animal Science, Faculty of Agriculture, Isfahan University of Technology, Isfahan, Iran
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Hasanpur K, Nassiri MR, Hosseini Salekdeh G, Vaez Torshizi R, Pakdel A, Kermanshahi H, Naghous M. The suitability of some blood gas and biochemical parameters as diagnostic tools or early indicators of ascites syndrome in broiler sire lines. J Anim Physiol Anim Nutr (Berl) 2015; 100:456-63. [PMID: 26608233 DOI: 10.1111/jpn.12395] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 07/29/2015] [Indexed: 11/28/2022]
Abstract
In recent few years, there have been some attempts to find a reliable indicator trait as a selection criterion against susceptibility to ascites syndrome (AS). Blood parameters were of great interest as they could be measured in live animals without implementing an ascites-inducing challenge (AIC). In this work, the suitability of some blood parameters was evaluated for diagnosing AS-susceptible chicks in later steps of the disease in trial 1 as well as their early predictive ability in trial 2. In the first trial, one hundred 1-day-old chicks from two pure broiler lines namely S1 and S2 and, in the second trial, 226 1-day-old chicks from line S2 were subjected to AIC. Saline drinking water (1200 mg/l) and lower-than-standard ambient temperatures were the implemented AICs in trials 1 and 2 respectively. The blood parameters including pH, partial pressure of O2 (pO2 ), partial pressure of CO2 (pCO2 ), bicarbonate ion concentration (BIC), percentage of haematocrit (HCT) and saturated haemoglobin (SaO2 ) were measured twice per each bird at days 28 and 35 in trial 1 and once in trial 2 at day 21. The results of the first trial revealed that in line S2 some of the blood parameters differed significantly between the ascitic and non-ascitic groups following exposure to AIC. In this line, the incidence of AS was accompanied by a lower pO2 , SaO2 and BIC, while with higher pCO2 and HCT values. In the second trial, however, although almost all of the parameters showed meaningful differences between the ascitic and non-ascitic broilers, only mean difference of BIC parameter was statistically significant. The general conclusion of this study is that the blood parameters can somewhat have diagnostic ability in the condition in which the AIC is already present, whereas the results did not approve their usefulness as early predictors of AS.
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Affiliation(s)
- K Hasanpur
- Department of Animal Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | - M R Nassiri
- Department of Animal Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | | | - R Vaez Torshizi
- Department of Animal Science, Tarbiat Modares University, Tehran, Iran
| | - A Pakdel
- Department of Animal Science, Isfahan University Of Technology, Isfahan, Iran
| | - H Kermanshahi
- Department of Animal Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | - M Naghous
- Department of Animal Science, Birjand University, Birjand, Iran
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Abdollahi-Arpanahi R, Pakdel A, Nejati-Javaremi A, Moradi Shahrbabak M, Morota G, Valente BD, Kranis A, Rosa GJM, Gianola D. Dissection of additive genetic variability for quantitative traits in chickens using SNP markers. J Anim Breed Genet 2014; 131:183-93. [PMID: 24460953 DOI: 10.1111/jbg.12079] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Accepted: 12/13/2013] [Indexed: 02/03/2023]
Abstract
The aim of this study was to separate marked additive genetic variability for three quantitative traits in chickens into components associated with classes of minor allele frequency (MAF), individual chromosomes and marker density using the genomewide complex trait analysis (GCTA) approach. Data were from 1351 chickens measured for body weight (BW), ultrasound of breast muscle (BM) and hen house egg production (HHP), each bird with 354 364 SNP genotypes. Estimates of variance components show that SNPs on commercially available genotyping chips marked a large amount of genetic variability for all three traits. The estimated proportion of total variation tagged by all autosomal SNPs was 0.30 (SE 0.04) for BW, 0.33 (SE 0.04) for BM, and 0.19 (SE 0.05) for HHP. We found that a substantial proportion of this variation was explained by low frequency variants (MAF <0.20) for BW and BM, and variants with MAF 0.10-0.30 for HHP. The marked genetic variance explained by each chromosome was linearly related to its length (R(2) = 0.60) for BW and BM. However, for HHP, there was no linear relationship between estimates of variance and length of the chromosome (R(2) = 0.01). Our results suggest that the contribution of SNPs to marked additive genetic variability is dependent on the allele frequency spectrum. For the sample of birds analysed, it was found that increasing marker density beyond 100K SNPs did not capture additional additive genetic variance.
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Affiliation(s)
- R Abdollahi-Arpanahi
- Department of Animal Science, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
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Abdollahi-Arpanahi R, Nejati-Javaremi A, Pakdel A, Moradi-Shahrbabak M, Morota G, Valente BD, Kranis A, Rosa GJM, Gianola D. Effect of allele frequencies, effect sizes and number of markers on prediction of quantitative traits in chickens. J Anim Breed Genet 2014; 131:123-33. [PMID: 24397350 DOI: 10.1111/jbg.12075] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Accepted: 11/29/2013] [Indexed: 01/09/2023]
Abstract
The objective was to assess goodness of fit and predictive ability of subsets of single nucleotide polymorphism (SNP) markers constructed based on minor allele frequency (MAF), effect sizes and varying marker density. Target traits were body weight (BW), ultrasound measurement of breast muscle (BM) and hen house egg production (HHP) in broiler chickens. We used a 600 K Affymetrix platform with 1352 birds genotyped. The prediction method was genomic best linear unbiased prediction (GBLUP) with 354 564 single nucleotide polymorphisms (SNPs) used to derive a genomic relationship matrix (G). Predictive ability was assessed as the correlation between predicted genomic values and corrected phenotypes from a threefold cross-validation. Predictive ability was 0.27 ± 0.002 for BW, 0.33 ± 0.001 for BM and 0.20 ± 0.002 for HHP. For the three traits studied, predictive ability decreased when SNPs with a higher MAF were used to construct G. Selection of the 20% SNPs with the largest absolute effect sizes induced a predictive ability equal to that from fitting all markers together. When density of markers increased from 5 K to 20 K, predictive ability enhanced slightly. These results provide evidence that designing a low-density chip using low-frequency markers with large effect sizes may be useful for commercial usage.
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Affiliation(s)
- R Abdollahi-Arpanahi
- Department of Animal Science, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
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Rezvannejad E, Pakdel A, Ashtianee SM, Yeganeh HM, Yaghoobi M. Analysis of growth characteristics in short-term divergently selected Japanese quail lines and their cross. J APPL POULTRY RES 2013. [DOI: 10.3382/japr.2011-00332] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Szwedowski TD, Fialkov J, Pakdel A, Whyne CM. An optimized process flow for rapid segmentation of cortical bones of the craniofacial skeleton using the level-set method. Dentomaxillofac Radiol 2013; 42:20120208. [PMID: 23420862 DOI: 10.1259/dmfr.20120208] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Accurate representation of skeletal structures is essential for quantifying structural integrity, for developing accurate models, for improving patient-specific implant design and in image-guided surgery applications. The complex morphology of thin cortical structures of the craniofacial skeleton (CFS) represents a significant challenge with respect to accurate bony segmentation. This technical study presents optimized processing steps to segment the three-dimensional (3D) geometry of thin cortical bone structures from CT images. In this procedure, anoisotropic filtering and a connected components scheme were utilized to isolate and enhance the internal boundaries between craniofacial cortical and trabecular bone. Subsequently, the shell-like nature of cortical bone was exploited using boundary-tracking level-set methods with optimized parameters determined from large-scale sensitivity analysis. The process was applied to clinical CT images acquired from two cadaveric CFSs. The accuracy of the automated segmentations was determined based on their volumetric concurrencies with visually optimized manual segmentations, without statistical appraisal. The full CFSs demonstrated volumetric concurrencies of 0.904 and 0.719; accuracy increased to concurrencies of 0.936 and 0.846 when considering only the maxillary region. The highly automated approach presented here is able to segment the cortical shell and trabecular boundaries of the CFS in clinical CT images. The results indicate that initial scan resolution and cortical-trabecular bone contrast may impact performance. Future application of these steps to larger data sets will enable the determination of the method's sensitivity to differences in image quality and CFS morphology.
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Bagheri M, Miraie-Ashtiani R, Moradi-Shahrbabak M, Nejati-Javaremi A, Pakdel A, von Borstel U, Pimentel E, König S. Selective genotyping and logistic regression analyses to identify favorable SNP-genotypes for clinical mastitis and production traits in Holstein dairy cattle. Livest Sci 2013. [DOI: 10.1016/j.livsci.2012.11.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Khosravanifard B, Rakhshan V, Ghasemi M, Pakdel A, Baradaran-Eghbal S, Sheikholeslami R, Dadolahi-Sarab T, Rakhshan H. Tehran dentists' self-reported knowledge and attitudes towards HIV/AIDS and observed willingness to treat simulated HIV-positive patients. East Mediterr Health J 2012; 18:928-34. [PMID: 23057385 DOI: 10.26719/2012.18.9.928] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Dentists' self-reported attitudes towards patients with HIV/AIDS might not reflect their actual behaviour. In this study 2 observers posed as HIV-positive patients and directly evaluated the behaviour of 300 dentists in Tehran, Islamic Republic of Iran. Two months later another observer interviewed the same dentists at their offices regarding AIDS-related knowledge and self-reported attitudes. Only 14.9% of dentists agreed to treat the simulated HIV-positive patients, 78.5% referred and 6.6% rejected them. Older age, longer work experience, graduation from a non-Iranian university and not having additional degrees were significantly related to adverse behaviours. Mean scores were 8.3 (SD 9.7) (out of 18) for knowledge and 17.5 (SD 7.1) (out of 39) for attitude. There were no significant correlations between dentists' knowledge and attitude or between knowledge and behaviour, but there was a weak positive correlation between self-reported attitude and observed behaviour.
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Affiliation(s)
- B Khosravanifard
- Department of Orthodontics, Dental Branch, Islamic Azad University, Tehran, Islamic Republic of Iran
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Khaldari M, Yeganeh HM, Pakdel A, Javaremi AN, Berg P. Response to family selection and genetic parameters in Japanese quail selected for four week breast weight. Arch Anim Breed 2011. [DOI: 10.5194/aab-54-212-2011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Abstract. An experiment was conducted to investigate the effect of short-term selection for 4 week breast weight (4wk BRW), and to estimate genetic parameters of body weight, and carcass traits. A selection (S) line and control (C) line was randomly selected from a base population. Data were collected over two consecutive hatches for four generations. A total of 1 135 records from 156 sires and 218 dams were used to estimate the genetic parameters. The genetic improvement of 4wk BRW was 3.5, 2.7 and 0.6 g in generation 2, 3 and 4, respectively. The estimated heritability by using pedigree information was 0.35±0.06. There were a significant difference for BW, and carcass weights but not for carcass percent components between lines (P<0.01). The heritabilities and correlated responses for body weight (BW), carcass and leg weights were 0.46, 0.41 and 0.47, and 13.2, 16.2, 4.4 %, respectively. The genetic correlations of BRW with BW, carcass, leg, and back weights were 0.85, 0.88 and 0.72, respectively. Selection for 4 wk BRW improved feed conversion ratio (FCR) about 0.19 units over the selection period. Inbreeding caused an insignificant decline of the mean of some traits. Results from this experiment suggest that BW as a genetically correlated trait can be used to improve BRW.
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Varkoohi S, Pakdel A, Moradi Shahr Babak M, Nejati Javaremi A, Kause A, Zaghari M. Genetic parameters for feed utilization traits in Japanese quail. Poult Sci 2011; 90:42-7. [PMID: 21177442 DOI: 10.3382/ps.2010-01072] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Feed costs substantially affect the efficiency of poultry operations, justifying genetic improvement of feed utilization by selection. The current research was conducted to estimate genetic variance for the 4-wk feed conversion ratio (FCR) and its genetic correlations with BW, BW gain (WG), feed intake (FI), and residual feed intake (RFI) in Japanese quail. The data analyzed originated from a line selected for low FCR for 3 generations. In each generation, 35 sires and 70 dams were used as parents for the next generation. Body weight and WG were recorded on a total of 1,226 individuals, whereas FCR, RFI, and FI were recorded on 505 family groups. The results showed that heritability estimates (±SE) of BW at 28 d of age and WG between 7 and 28 d of age were 0.22 ± 0.05 and 0.28 ± 0.06, respectively. For FI, FCR, and RFI, significant genetic variances were estimated. Genetic correlations of FCR between 7 and 28 d of age with WG and FI between 7 and 28 d of age were -0.45 ± 0.09 and 0.24 ± 0.08, respectively. This implies that a low FCR is genetically related to a high WG and low FI. The genetic correlation between FCR from 7 to 28 d of age and RFI from 7 to 28 d of age was 0.26 ± 0.08, indicating that the 2 alternative feed efficiency traits are genetically different traits, and that the correlated genetic response in one of them in response to selection on the other is likely to be only moderate. Genetic correlations of RFI from 7 to 28 d of age with WG and FI between 7 and 28 d of age were 0.08 ± 0.04 and 0.74 ± 0.11, respectively. This reflects the fact that RFI is phenotypically independent of WG, which tends to make the genetic correlation between RFI and WG low as well. In conclusion, all the traits analyzed displayed significant genetic variance, allowing their genetic improvement by selection, yet the alternative feed utilization traits, FCR and RFI, displayed different genetic characteristics.
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Affiliation(s)
- S Varkoohi
- Department of Animal Science, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran.
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Varkoohi S, Moradi Shahr Babak M, Pakdel A, Nejati Javaremi A, Zaghari M, Kause A. Erratum to “Response to selection for feed conversion ratio in Japanese quail” (Poult. Sci. 89:1590–1598). Poult Sci 2011. [DOI: 10.3382/ps.2011-90-1-0295] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Varkoohi S, Moradi Shahr Babak M, Pakdel A, Nejati Javaremi A, Zaghari M, Kause A. Response to selection for feed conversion ratio in Japanese quail. Poult Sci 2010; 89:1590-8. [PMID: 20634511 DOI: 10.3382/ps.2010-00744] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We investigated the effect of selection for 4-wk feed conversion ratio (FCR) on genetic improvement of FCR, BW, weight gain (WG), feed intake (FI), and residual FI (RFI) in Japanese quail. The F line was selected for reduced FCR and the C line was maintained as a randombred control. In each generation, 35 sires and 70 dams were used as parents for the next generation. Three generations of selection were performed. Realized heritability for FCR was calculated as the ratio of cumulative selection response to the cumulative selection differential, and additionally, genetic response was quantified as the difference between the means of selection and control lines. The results showed that realized heritability for FCR after 3 generations of selection was 0.67. The mean FCR in F line and C line in the last generation was 2.13 and 2.61, respectively. This is 18.4% cumulative genetic improvement, or 6.1% improvement per generation. In the last generation, the means of F and C lines were 193 and 166 g for BW at age 28 d (16.4% total increase, or 5.5% per generation), 184 and 158 g for WG (17.2% total higher gain and 5.7% per generation), 393 and 413 g for FI (4.9% total higher consumption and 1.6% per generation), and -24.5 and 10.2 for RFI (-34.7 g of cumulative gain; -11.6 g per generation), respectively. These results show that selection to decrease FCR increases BW and WG and decreases FI and RFI as a correlated response.
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Affiliation(s)
- S Varkoohi
- Department of Animal Science, University College of Agriculture and Natural Resources, University of Tehran, PO Box 4111, Karaj, Iran. [corrected]
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Khaldari M, Pakdel A, Mehrabani Yeganeh H, Nejati Javaremi A, Berg P. Erratum to “Response to selection and genetic parameters of body and carcass weights in Japanese quail selected for 4-week body weight” (Poult. Sci. 89:1834–1841). Poult Sci 2010. [DOI: 10.3382/ps.2010-89-12-2752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Khaldari M, Pakdel A, Mehrabani Yeganeh H, Mehrabani Yegane H, Nejati Javaremi A, Berg P. Response to selection and genetic parameters of body and carcass weights in Japanese quail selected for 4-week body weight. Poult Sci 2010; 89:1834-41. [PMID: 20709967 DOI: 10.3382/ps.2010-00725] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The current study was conducted to investigate the effect of short-term selection in Japanese quail for 4-wk BW and estimate genetic parameters of BW, carcass traits, and egg weight. A selected line and control line were randomly selected from a base population. In each generation, 39 sires and 78 dams were used as parents for the next generation. Data were collected over 2 consecutive hatches for 4 generations, and 1,554 records from 151 sires and 285 dams were used to estimate the genetic parameters. The genetic improvement of 4-wk BW was 9.6, 8.8, and 8.2 g in generations 2, 3, and 4, respectively. There was a significant effect of sex, generation, and line (P < 0.001). There was a significant difference for BW and carcass weights but not for carcass percentage components between sexes (P < 0.01). Females showed higher figures than males. The realized heritability for 4-wk BW was 0.55, reflecting the accuracy of selection. However the estimated heritability by using pedigree information was 0.26 +/- 0.05. The genetic correlation among BW and carcass traits was relatively high (ranging from 0.85 to 0.91). Inbreeding caused a decline in the mean for all of the traits, but its effect was only significant for 4-wk BW and carcass weight (P < 0.05). Selection for 4-wk BW improved feed conversion ratio 0.16 units over the selection period. Results showed there was a strong genetic correlation between 4-wk BW and carcass traits that suggests that early 4-wk BW can be used as a selection criterion to improve carcass traits. Also, intense selection resulting in high rates of inbreeding might result in decreased response to selection due to inbreeding depression.
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Affiliation(s)
- M Khaldari
- Department of Animal Science, Faculty of Agriculture, University of Tehran, PO Box 4111, 31587-77871 Karaj, Iran
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Fishman RA, Happ E, Stevens T, Kunschner L, Jaworski DM, Stradecki HM, Penar PL, Pendlebury WW, Pennington CJ, Edwards DR, Broaddus WC, Fillmore HL, Mukherjee J, Hawkins C, Guha A, Pioli PD, Milani S, Linskey ME, Zhou YH, Marchetti V, Barnett F, Wang M, Scheppke L, Sanchez-Cespedes J, De Rossi C, Nemerow G, Torbett B, Friedlander M, Goldlust SA, Singer S, DeAngelis LM, Lassman AB, Nolan CP, Yang SH, Lee SW, Chen ZP, Liu XM, Wojton JA, Chu Z, Qi X, Kaur B, Zhou YH, Hu Y, Pioli PD, Siegel E, Ro DI, Marlon S, Hsu N, Milani SN, Mohan S, Yu L, Hess KR, Linskey ME, Liu Y, Carson-Walter E, Walter K, Raghu H, Gondi CS, Gujrati M, Dinh DH, Rao JS, Narayana A, Kunnakkat SD, Medabalmi P, Golfinos J, Parker E, Knopp E, Zagzag D, Gruber D, Gruber ML, Burrell K, Jelveh S, Lindsey P, Hill R, Zadeh G, Ivkovic S, Beadle C, Massey SC, Swanson KR, Canoll P, Rosenfeld SS, McAllister S, Soroceanu L, Pakdel A, Limbad C, Adrados I, Desprez PY, Nakada M, Nambu E, Furuyama N, Yoshida Y, Kita D, Hayashi Y, Hayashi Y, Hamada JI, Seyed Sadr M, Maret D, Seyed Sadr E, Siu V, Alshami J, Denault JS, Faury D, Jabado N, Nantel A, Del Maestro R, Kunnakkat SD, Perretta D, Medabalmi P, Gruber ML, Gruber D, Golfinos J, Parker E, Narayana A, Pioli PD, Linskey ME, Zhou YH, Nagaiah G, Almubarak M, Torres-Trejo A, Newton, M, Willey P, Altaha R, Murphy SF, Banasiak M, Yee GT, Wotoczek-Obadia M, Tran Y, Prak A, Albright R, Mullan M, Paris D, Brem S, Yang YP, Ennis M, Tran N, Symons M, Najbauer J, Huszthy PC, Garcia E, Metz MZ, Gutova M, Frank RT, Miletic H, Glackin CA, Barish ME, Bjerkvig R, Aboody KS, Clump DA, Engh JA, Mintz AH, Cunnick J, Flynn DC, Clark AJ, Butowski NA, Chang SM, Prados MD, Clarke J, Polley MYC, Sughrue ME, McDermott MW, Parsa AT, Berger MS, Aghi MK, Megyesi JF, Costello P, Macdonald W, Dyer E, Macdonald D, Hammond R, Kalache Y, Easaw J, McIntyre J, Williams SC, Karajannis MA, Chiriboga L, von Deimling A, Zagzag D, Ajlan A, Husaine S, Petrecca K, Magnus N, Garnier D, Meehan B, Rak J. Angiogenesis and Invasion. Neuro Oncol 2010. [DOI: 10.1093/neuonc/noq116.s1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Pakdel A, van Arendonk JAM, Vereijken ALJ, Bovenhuis H. Genetic parameters of ascites-related traits in broilers: correlations with feed efficiency and carcase traits. Br Poult Sci 2010; 46:43-53. [PMID: 15835251 DOI: 10.1080/00071660400023805] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
(1) Pulmonary hypertension syndrome followed by ascites is a metabolic disorder in broilers that occurs more often in fast-growing birds and at cool temperatures. (2) Knowledge of the genetic relationships among ascites-related traits and performance traits like carcase traits or feed efficiency traits is required to design breeding programmes that aim to improve the degree of resistance to ascites syndrome as well as production traits. The objective of this study was to estimate these genetic correlations. (3) Three different experiments were set up to measure ascites-related traits (4202 birds), feed efficiency traits (2166 birds) and carcase traits (2036 birds). The birds in different experiments originated from the same group of parents, which enabled the estimation of genetic correlations among different traits. (4) The genetic correlation of body weight (BW) measured under normal conditions and in the carcase experiment with the ascites indicator trait of right ventricle to total ventricle ratio (RV:TV) measured under cold conditions was 0.30. The estimated genetic correlation indicated that single-trait selecting for BW leads to an increase in occurrence of the ascites syndrome but that there are realistic opportunities of multi-trait selection of birds for improved BW and resistance to ascites. (5) Weak but positive genetic relationships were found between feed efficiency and ascites-related traits suggesting that more efficient birds tend to be slightly more susceptible to ascites. (6) The relatively low genetic correlation between BW measured in the carcase or in the feed efficiency experiments and BW measured in the ascites experiment (0.49) showed considerable genotype by environment interaction. (7) These results indicate that birds with high genetic potential for growth rate under normal temperature conditions have lower growth rate under cold-stress conditions due to ascites.
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Affiliation(s)
- A Pakdel
- Animal Breeding and Genetics Group, Wageningen Institute of Animal Sciences, Wageningen, The Netherlands.
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Rabie TSKM, Crooijmans RPMA, Bovenhuis H, Vereijken ALJ, Veenendaal T, van der Poel JJ, Van Arendonk JAM, Pakdel A, Groenen MAM. Genetic mapping of quantitative trait loci affecting susceptibility in chicken to develop pulmonary hypertension syndrome. Anim Genet 2006; 36:468-76. [PMID: 16293119 DOI: 10.1111/j.1365-2052.2005.01346.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Pulmonary hypertension syndrome (PHS), also referred to as ascites syndrome, is a growth-related disorder of chickens frequently observed in fast-growing broilers with insufficient pulmonary vascular capacity at low temperature and/or at high altitude. A cross between two genetically different broiler dam lines that originated from the White Plymouth Rock breed was used to produce a three-generation population. This population was used for the detection and localization of quantitative trait loci (QTL) affecting PHS-related traits. Ten full-sib families consisting of 456 G2 birds were typed with 420 microsatellite markers covering 24 autosomal chromosomes. Phenotypic observations were collected on 4202 G3 birds and a full-sib across family regression interval mapping approach was used to identify QTL. There was statistical evidence for QTL on chicken chromosome 2 (GGA2), GGA4 and GGA6. Suggestive QTL were found on chromosomes 5, 8, 10, 27 and 28. The most significant QTL were located on GGA2 for right and total ventricular weight as percentage of body weight (%RV and %TV respectively). A related trait, the ratio of right ventricular weight as percentage to total ventricular weight (RATIO), reached the suggestive threshold on this chromosome. All three QTL effects identified on GGA2 had their maximum test statistic in the region flanked by markers MCW0185 and MCW0245 (335-421 cM).
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Affiliation(s)
- T S K M Rabie
- Animal Breeding and Genetics Group, Wageningen Institute of Animal Sciences, Wageningen, The Netherlands
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Pakdel A, van Arendonk JAM, Vereijken ALJ, Bovenhuis H. Genetic parameters of ascites-related traits in broilers: effect of cold and normal temperature conditions. Br Poult Sci 2005; 46:35-42. [PMID: 15835250 DOI: 10.1080/00071660400023938] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
(1) Ascites syndrome is a growth-related disorder of broilers that occurs more often in fast-growing birds and at low temperatures. The objective of this study was to estimate genetic and phenotypic correlations among ascites-related traits measured either under cold or under normal temperature conditions, and to estimate genetic correlations between ascites-related traits measured under cold and normal conditions. (2) Several traits related to ascites were measured on more than 4000 chickens under cold conditions and on more than 700 chickens under normal conditions. (3) The heritability estimates for body weight (BW) measured under cold and normal conditions were 0.42 and 0.50, respectively, for haematocrit value 0.46 and 0.17, respectively, and for ratio of right to total ventricular weight 0.45 and 0.12, respectively. (4) The genetic correlation between BW and haematocrit value under cold conditions was -0.23 and between BW and ratio of right to total ventricular weight -0.27. Under normal conditions, however, these genetic correlations were 0.55 and 0.50, respectively. (5) These results demonstrate that the heritability estimates of ascites-related traits as well as genetic correlations between ascites-related traits and BW depend on the temperature conditions under which animals are kept. (6) Strong positive genetic correlations (around 0.8) were observed between total mortality, fluid in the abdomen and ratio of right to total ventricular weight under cold conditions. The genetic correlation between ratio of right to total ventricular weight under cold and normal conditions was 0.91. (7) These results suggest that the ratio of right to total ventricular weight measured under normal temperature conditions might serve as a good indicator trait for ascites.
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Affiliation(s)
- A Pakdel
- Animal Breeding and Genetics Group, Wageningen Institute of Animal Sciences, Wageningen, The Netherlands.
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Abstract
Ascites syndrome is a metabolic disorder in broilers. Mortality due to ascites results in significant economic losses and has a negative impact on animal welfare. It has been shown that genetic factors play a considerable role in susceptibility of birds to ascites, which offers perspectives for selection against this syndrome. The aim of the present study was to evaluate the consequences of alternative selection strategies for BW and resistance to ascites syndrome using deterministic simulation. In addition to the consequences of current selection (i.e., selection for increased BW only) alternative selection strategies including information on different ascites-related traits measured under normal or cold conditions and the consequences of having information on the underlying genes (i.e., MAS) were quantified. Five different breeding schemes were compared based on the selection response for BW, ascites susceptibility, and the rate of inbreeding. Traits investigated in the index as indicators for ascites were hematocrit value (HCT) and ratio of right ventricle to the total ventricular weight of the heart (RV:TV). The results indicated that by ignoring ascites susceptibility in the breeding goal, the gain for BW is 130 g and the birds will become more susceptible to ascites. Testing 50% of the birds under cold temperature conditions and including information of ascites related traits (HCT and RV:TV) measured under normal and cold conditions makes it possible to achieve a relatively high gain for BW (111.4 g) while controlling the genetic level for ascites susceptibility (selection response was 0). The results of scenarios including QTL information of ascites susceptibility showed that QTL information could be used very effectively in controlling ascites susceptibility.
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Affiliation(s)
- A Pakdel
- Animal Breeding and Genetics Group, Wageningen Institute of Animal Sciences, 6700 AH Wageningen, The Netherlands
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Abstract
The objective of the present study was to estimate heritabilities for ascites-related traits in broilers and to assess the importance of maternal genetic effects for these traits. Several traits related to ascites were measured on more than 4,000 broilers kept under cold conditions. Heritabilities were estimated using an animal model with a direct genetic effect and a model with direct and maternal genetic effects. Estimated heritabilities from the direct genetic effects model were 0.46 for hematocrit value, 0.42 for BW, 0.47 for right ventricular weight, 0.46 for total ventricular weight, 0.45 for ratio of right ventricular weight to the total ventricular weight, 0.32 for total mortality, and 0.18 for fluid accumulation in the heart sac. Maternal effects significantly influenced the traits BW, total ventricular weight, and total mortality. Direct and maternal heritabilities, respectively, for BW were 0.21 and 0.04, for total ventricular weights were 0.29 and 0.03, and for total mortality were 0.16 and 0.05. The heritability estimates for ascites-related traits and the significance of maternal genetic effects for most of these traits indicate that direct and maternal genetic effects play an important role in the development of the ascites syndrome.
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Affiliation(s)
- A Pakdel
- Animal Breeding and Genetics Group, Wageningen Institute of Animal Sciences, The Netherlands.
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