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Schmidt PI, Campos GS, Roso VM, Souza FRP, Boligon AA. Genetic analysis of female reproductive efficiency, scrotal circumference and growth traits in Nelore cattle. Theriogenology 2019; 128:47-53. [PMID: 30743103 DOI: 10.1016/j.theriogenology.2019.01.032] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [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: 08/17/2018] [Revised: 11/21/2018] [Accepted: 01/31/2019] [Indexed: 11/16/2022]
Abstract
This study estimated the genetic variability and correlations between growth and reproductive traits in Nelore cattle. Annual genetic changes in female reproductive traits were also evaluated using repeated measures. Direct heritability was moderate for the growth traits and scrotal circumference (0.235 ± 0.015 to 0.443 ± 0.006), indicating genetic variability in these traits in the population studied. Maternal heritability was low for weaning height (0.042 ± 0.012) and weaning weight (0.112 ± 0.013). Regarding female reproductive traits, gestation length (GL) exhibited a slightly higher heritability (0.179 ± 0.006) than days to calving (DC) and calving interval (CI) (0.123 ± 0.006 and 0.105 ± 0.008, respectively). Repeatability was lower for GL (0.222 ± 0.006) compared to DC (0.318 ± 0.004) and CI (0.406 ± 0.006). Moderate and positive genetic correlations were obtained between the growth traits and scrotal circumference, ranging from 0.193 ± 0.019 to 0.519 ± 0.007. Weaning height showed low and positive genetic associations with GL (0.138 ± 0.007) and CI (0.189 ± 0.016), but was not correlated with DC (-0.016 ± 0.011). Similarly, weaning weight, yearling height or yearling weight was not associated with any of the female reproductive traits. The genetic correlations between scrotal circumference and female reproductive traits were negative and favorable, but low: -0.116 ± 0.020 (GL), -0.084 ± 0.028 (DC), and -0.054 ± 0.038 (CI). Favorable genetic associations were estimated between all female reproductive traits, ranging from 0.170 ± 0.040 to 0.442 ± 0.050. Genetic changes were favorable for GL and CI (-0.02 days/year and -0.11 days/year, respectively) and unfavorable for DC (0.16 days/year). In conclusion, selection for higher growth using the estimated breeding values for height and weight will not affect the reproductive performance of Nelore females. Nonetheless, simultaneous selection for growth and reproductive traits is possible.
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Affiliation(s)
- P I Schmidt
- Animal Science Department, Federal University of Pelotas, 96010-900, Pelotas, Brazil
| | - G S Campos
- Animal Science Department, Federal University of Rio Grande do Sul, 90040-060, Porto Alegre, Brazil
| | - V M Roso
- GenSys Associates and Consultants S/S LTDA, 90680-001, Porto Alegre, Brazil
| | - F R P Souza
- Ecology, Zoology and Genetics Department, Federal University of Pelotas, 96010-900, Pelotas, Brazil
| | - A A Boligon
- Animal Science Department, Federal University of Pelotas, 96010-900, Pelotas, Brazil.
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Boligon AA, Farias PP, Roso VM, Santana ML, Bignardi AB, Souza FRP. Genetic relations and indirect response to selection based on indices for scrotal circumference, visual scores and weight gain in beef cattle. Anim Prod Sci 2018. [DOI: 10.1071/an16365] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Genetic improvement in beef cattle involves evaluation for fertility, growth, carcass and visual scores traits. In general, genetic and economic parameters of these traits are considered for selection index construction. The present study was conducted to establish the magnitude of genetic and phenotypic correlations between visual scores of conformation, precocity and muscling at weaning and at yearling, birth to weaning weight gain, weaning to yearling weight gain and yearling scrotal circumference, and between these traits with selection indices applied in this population. In addition, the expected gains were obtained in such traits by taking under consideration the adopted selection criteria based on indices. Positive and high genetic correlations were estimated between weaning traits (visual scores and weight gain), ranging from 0.70 ± 0.02 to 0.97 ± 0.01. In genetic terms, the same visual scores, but evaluated in two ages (weaning and yearling) showed positive and high associations, with values of 0.90 ± 0.01 (conformation), 0.88 ± 0.01 (precocity) and 0.84 ± 0.02 (muscling). Genetic associations between yearling visual scores with scrotal circumference and weaning to yearling weight gain ranging from 0.36 ± 0.02 to 0.53 ± 0.01. Using the weaning index, are expected genetic gains ranging from 0.26% to 0.70%/year of the phenotypic mean of each weaning trait. Using the yearling index, annual genetic gains estimated for weaning traits (ranging from 0.25% to 0.63% of the phenotypic mean of the trait) were lower than that obtained at yearling (ranging from 0.27% to 0.98% of the phenotypic mean of the trait). Selection for one of traits obtained at weaning should result, by correlated response, in gain for the others. Also, the choice of animals with higher breeding values for weaning visual scores, beyond anticipate the selection process, should lead to favourable changes in these traits at yearling. Selection for better body composition at yearling (higher scores) should provide increase in scrotal circumference and weight gain. The use of higher values of the indices should result in positively correlated response, but in different magnitudes for each trait used in these indices. However, in both weaning and yearling, higher genetic gains to visual scores are expected in the same period, when the selection is based on the values of these indices.
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Dias MM, Cánovas A, Mantilla-Rojas C, Riley DG, Luna-Nevarez P, Coleman SJ, Speidel SE, Enns RM, Islas-Trejo A, Medrano JF, Moore SS, Fortes MRS, Nguyen LT, Venus B, Diaz ISDP, Souza FRP, Fonseca LFS, Baldi F, Albuquerque LG, Thomas MG, Oliveira HN. SNP detection using RNA-sequences of candidate genes associated with puberty in cattle. Genet Mol Res 2017; 16:gmr-16-01-gmr.16019522. [PMID: 28340271 DOI: 10.4238/gmr16019522] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Fertility traits, such as heifer pregnancy, are economically important in cattle production systems, and are therefore, used in genetic selection programs. The aim of this study was to identify single nucleotide polymorphisms (SNPs) using RNA-sequencing (RNA-Seq) data from ovary, uterus, endometrium, pituitary gland, hypothalamus, liver, longissimus dorsi muscle, and adipose tissue in 62 candidate genes associated with heifer puberty in cattle. RNA-Seq reads were assembled to the bovine reference genome (UMD 3.1.1) and analyzed in five cattle breeds; Brangus, Brahman, Nellore, Angus, and Holstein. Two approaches used the Brangus data for SNP discovery 1) pooling all samples, and 2) within each individual sample. These approaches revealed 1157 SNPs. These were compared with those identified in the pooled samples of the other breeds. Overall, 172 SNPs within 13 genes (CPNE5, FAM19A4, FOXN4, KLF1, LOC777593, MGC157266, NEBL, NRXN3, PEPT-1, PPP3CA, SCG5, TSG101, and TSHR) were concordant in the five breeds. Using Ensembl's Variant Effector Predictor, we determined that 12% of SNPs were in exons (71% synonymous, 29% nonsynonymous), 1% were in untranslated regions (UTRs), 86% were in introns, and 1% were in intergenic regions. Since these SNPs were discovered in RNA, the variants were predicted to be within exons or UTRs. Overall, 160 novel transcripts in 42 candidate genes and five novel genes overlapping five candidate genes were observed. In conclusion, 1157 SNPs were identified in 62 candidate genes associated with puberty in Brangus cattle, of which, 172 were concordant in the five cattle breeds. Novel transcripts and genes were also identified.
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Affiliation(s)
- M M Dias
- Departamento de Zootecnia, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP, Brasil
| | - A Cánovas
- Centre for Genetic Improvement of Livestock, Department of Animal Bioscience, University of Guelph, Guelph, ON, Canada
| | - C Mantilla-Rojas
- Department of Animal Science, Texas A&M University, College Station, TX, USA
| | - D G Riley
- Department of Animal Science, Texas A&M University, College Station, TX, USA
| | - P Luna-Nevarez
- Departamento de Ciencias Agronómicas y Veterinarias, Instituto Tecnológico de Sonora, Ciudad Obregón, SON, México
| | - S J Coleman
- Department of Animal Sciences, Colorado State University, Fort Collins, CO, USA
| | - S E Speidel
- Department of Animal Sciences, Colorado State University, Fort Collins, CO, USA
| | - R M Enns
- Department of Animal Sciences, Colorado State University, Fort Collins, CO, USA
| | - A Islas-Trejo
- Department of Animal Science, University of California, Davis, CA, USA
| | - J F Medrano
- Department of Animal Science, University of California, Davis, CA, USA
| | - S S Moore
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, Australia
| | - M R S Fortes
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, St Lucia, Australia
| | - L T Nguyen
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, St Lucia, Australia.,Faculty of Biotechnology, Vietnam National University of Agriculture, Vietnam
| | - B Venus
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, Australia
| | - I S D P Diaz
- Departamento de Zootecnia, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP, Brasil
| | - F R P Souza
- Departamento de Ecologia, Zoologia e Genética, Universidade Federal de Pelotas, Pelotas, RS, Brasil
| | - L F S Fonseca
- Departamento de Zootecnia, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP, Brasil
| | - F Baldi
- Departamento de Zootecnia, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP, Brasil
| | - L G Albuquerque
- Departamento de Zootecnia, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP, Brasil
| | - M G Thomas
- Department of Animal Sciences, Colorado State University, Fort Collins, CO, USA
| | - H N Oliveira
- Departamento de Zootecnia, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP, Brasil
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Silveira DD, De Vargas L, Roso VM, Campos GS, Souza FRP, Boligon AA. Genetic study of visual scores and hip height at different ages in Nelore cattle. Anim Prod Sci 2017. [DOI: 10.1071/an15657] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The objective of the present study was to evaluate the genetic variability of visual scores used as selection criteria in Nelore cattle, as well as their associations with yearling hip height (YH) and mature hip height (MH), to determine whether the selection considered would change the hip height of animals. (Co)variance components were obtained by two-trait animal model using Gibbs sampling, including YH or MH in each analysis. Breeding values for YH and MH were used to obtain the response to selection. The posterior mean of the heritability estimates for conformation, finishing precocity (or body condition) and muscling at weaning (WC: 0.21 ± 0.02; WP: 0.21 ± 0.02; and WM: 0.18 ± 0.02 respectively) were lower than those obtained for the same traits at yearling (YC: 0.34 ± 0.02; YP: 0.37 ± 0.02; and YM: 0.38 ± 0.02 respectively). Heritability estimates for YH and MH were 0.28 ± 0.01 and 0.33 ± 0.03 respectively. The results suggested that these traits should respond to selection process, but in different magnitudes. Positive and high genetic correlations were estimated between WC and YH and YC and YH (0.80 ± 0.03 and 0.76 ± 0.03 respectively), and lower values between these scores and MH (0.48 ± 0.09 and 0.36 ± 0.07 respectively). Weak genetic associations were obtained between finishing precocity score and YH and muscling score and YH (ranging from 0.05 ± 0.05 to 0.18 ± 0.06). Moreover, negative and favourable genetic associations between each of WP, WM, YP and YM, and MH (ranging from –0.21 ± 0.07 to –0.12 ± 0.09) were estimated. Correlated responses are expected to be unfavourable for hip height, measured at yearling and at maturity, when animals better genetically evaluated for conformation in relation to finishing precocity and muscling scores are selected. Genetic changes obtained for YH and MH were null (–0.02 cm/year and 0.03 cm/year respectively). It can be explained, in part, by smaller weights in the selection index for conformation rather than finishing precocity and muscling, as applied in the studied herds. However, in herds of beef cattle not evaluated and selected for finishing precocity and muscling scores or that have cows with larger size than acceptable, the adoption of mature hip height as one of the selection criteria can be one alternative for obtaining females with a desirable size.
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Boligon AA, Vicente IS, Vaz RZ, Campos GS, Souza FRP, Carvalheiro R, Albuquerque LG. Principal component analysis of breeding values for growth and reproductive traits and genetic association with adult size in beef cattle1. J Anim Sci 2016; 94:5014-5022. [DOI: 10.2527/jas.2016-0737] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [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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Boligon AA, De Vargas L, Silveira DD, Roso VM, Campos GS, Vaz RZ, Souza FRP. Genetic models for breed quality and navel development scores and its associations with growth traits in beef cattle. Trop Anim Health Prod 2016; 48:1679-1684. [PMID: 27627906 DOI: 10.1007/s11250-016-1143-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Accepted: 09/06/2016] [Indexed: 11/26/2022]
Abstract
Estimation and prediction ability of linear and threshold models for yearling breed quality score (BQ) and navel development score at weaning (WN) and yearling (YN), considering variances, heritabilities, and rank correlations based on the breeding values predicted for bulls, were compared. Furthermore, it was determined whether BQ, WN, and YN are genetically associated with growth traits (BWG: birth to weaning weight gain, WH: weaning height, WYG: weaning to yearling weight gain, YH: yearling height) to field data of Nelore cattle. For BQ, similar heritabilities were estimated using linear (0.14 ± 0.01) and threshold (0.15 ± 0.02) models. For navel development scores, higher heritability was estimated with threshold (WN 0.22 ± 0.03; YN 0.42 ± 0.03) rather than linear (WN 0.16 ± 0.01; YN 0.29 ± 0.01) models. Rank correlations between sires breeding values predicted for visual scores with linear and threshold models ranging from 0.53 to 0.98, indicating that different sires would be selected using these models, mainly for higher selection intensities. The BQ showed little genetic variability and was not associated with WH and YH. However, low and positive genetic correlations were obtained between BQ with BWG (0.27 ± 0.02) and WYG (0.25 ± 0.02). In general, they are expected low genetic gains for BQ as correlated response to selection based on any of the growth traits studied. The WN showed higher genetic correlation with BWG (0.63 ± 0.02) and WH (0.53 ± 0.02) rather than WYG (-0.06 ± 0.02) and YH (0.26 ± 0.02), indicating that selection for increased growth at weaning (height and weight gain) should lead to longer and most pendulous navels at this age. Weak genetic correlations were obtained between yearling navel and growth traits.
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Affiliation(s)
- A A Boligon
- Departamento de Zootecnia, Universidade Federal de Pelotas, Pelotas, RS, Brazil, CEP 96160-000.
| | - L De Vargas
- Departamento de Zootecnia, Universidade Federal de Pelotas, Pelotas, RS, Brazil, CEP 96160-000
| | - D D Silveira
- Departamento de Zootecnia, Universidade Federal de Pelotas, Pelotas, RS, Brazil, CEP 96160-000
| | - V M Roso
- GenSys Consultores Associados S/S Ltda., Porto Alegre, RS, Brazil
| | - G S Campos
- Departamento de Zootecnia, Universidade Federal de Pelotas, Pelotas, RS, Brazil, CEP 96160-000
| | - R Z Vaz
- Departamento de Zootecnia, Universidade Federal de Pelotas, Pelotas, RS, Brazil, CEP 96160-000
| | - F R P Souza
- Instituto de Biologia, Universidade Federal de Pelotas, Pelotas, RS, Brazil, CEP 96160-000
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Espigolan R, Baldi F, Boligon AA, Souza FRP, Fernandes Júnior GA, Gordo DGM, Venturini GC, de Camargo GMF, Feitosa FLB, Garcia DA, Tonhati H, Chardulo LAL, Oliveira HN, Albuquerque LG. Associations between single nucleotide polymorphisms and carcass traits in Nellore cattle using high-density panels. Genet Mol Res 2015; 14:11133-44. [PMID: 26400344 DOI: 10.4238/2015.september.22.7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The objective of this study was to evaluate associations between single nucleotide polymorphism (SNP) markers and carcass traits measured postmortem in Nellore cattle. Records of loin eye area (LEA) and backfat thickness (BF) from 740 males and records of hot carcass weight (HCW) from 726 males were analyzed. All of the animals were genotyped using the BovineHD BeadChip. Association analyses were performed by the restricted maximum likelihood method that considered one SNP at a time. Significant SNPs were identified on chromosomes 2 and 6 for LEA and on chromosomes 7, 1, and 2 for BF. For HCW, associations with SNPs were found on chromosomes 13, 14, and 28, in addition to genome regions that were directly related to this trait, such as the EFCAB8 and VSTM2L genes, and to bone development (RHOU). Some SNPs were located in very close proximity to genes involved in basal metabolism (BLCAP, NNAT, CTNNBL1, TGM2, and LOC100296770) and the immune system (BPI).
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Affiliation(s)
- R Espigolan
- Departamento de Zootecnia, Faculdade de Ciências Agrárias e Veterinárias, Jaboticabal, SP, Brasil
| | - F Baldi
- Departamento de Zootecnia, Faculdade de Ciências Agrárias e Veterinárias, Jaboticabal, SP, Brasil
| | - A A Boligon
- Departamento de Zootecnia, Faculdade de Ciências Agrárias e Veterinárias, Jaboticabal, SP, Brasil
| | - F R P Souza
- Departamento de Zootecnia, Faculdade de Ciências Agrárias e Veterinárias, Jaboticabal, SP, Brasil
| | - G A Fernandes Júnior
- Departamento de Zootecnia, Faculdade de Ciências Agrárias e Veterinárias, Jaboticabal, SP, Brasil
| | - D G M Gordo
- Departamento de Zootecnia, Faculdade de Ciências Agrárias e Veterinárias, Jaboticabal, SP, Brasil
| | - G C Venturini
- Departamento de Zootecnia, Faculdade de Ciências Agrárias e Veterinárias, Jaboticabal, SP, Brasil
| | | | - F L B Feitosa
- Departamento de Zootecnia, Faculdade de Ciências Agrárias e Veterinárias, Jaboticabal, SP, Brasil
| | - D A Garcia
- Departamento de Zootecnia, Faculdade de Ciências Agrárias e Veterinárias, Jaboticabal, SP, Brasil
| | - H Tonhati
- Departamento de Zootecnia, Faculdade de Ciências Agrárias e Veterinárias, Jaboticabal, SP, Brasil
| | - L A L Chardulo
- Departamento de Melhoramento e Nutrição Animal, Faculdade de Medicina Veterinária e Zootecnia, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - H N Oliveira
- Departamento de Zootecnia, Faculdade de Ciências Agrárias e Veterinárias, Jaboticabal, SP, Brasil
| | - L G Albuquerque
- Departamento de Zootecnia, Faculdade de Ciências Agrárias e Veterinárias, Jaboticabal, SP, Brasil
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Dias MM, Souza FRP, Takada L, Feitosa FLB, Costa RB, Diaz IDPS, Cardoso DF, Tonussi RL, Baldi F, Albuquerque LG, Oliveira HN. Study of lipid metabolism-related genes as candidate genes of sexual precocity in Nellore cattle. Genet Mol Res 2015; 14:234-43. [PMID: 25729955 DOI: 10.4238/2015.january.16.7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The objective of this study was to identify associations between known polymorphisms in genes related to adipose tissue and sexual precocity in Nellore cattle. A total of 1689 precocious and non-precocious heifers belonging to farms participating in Conexão Delta G breeding program were studied. SNPs from the Illumina High-Density Bovine SNP BeadChip were used. This chip contains 777,000 SNPs located within the region of the candidate genes at a distance of up to 5 kb, considering that linkage disequilibrium (LD) exists at this distance. Linear models were used for statistical analysis. The fastPHASE and GenomeStudio programs were used for haplotype reconstruction and LD analysis based on r2 statistics. Fifty-seven candidate genes and 443 SNPs were analyzed: among the latter, 370 SNPs formed 83 haplotypes, while the remaining SNPs were studied separately. Statistical analysis showed that only three haplotypes, one haplotype consisting of two SNPs located in the FABP4 gene and two haplotypes consisting of four and two SNPs located in the PPP3CA gene, had a significant effect on sexual precocity at P < 0.05. It can be concluded that the FABP4 and PPP3CA genes influence sexual precocity and may therefore be used in selection programs designed to improve sexual precocity in Nellore cattle.
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Affiliation(s)
- M M Dias
- Departamento de Zootecnia, Universidade Estadual Paulista "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
| | - F R P Souza
- Departamento de Zootecnia, Universidade Estadual Paulista "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
| | - L Takada
- Departamento de Zootecnia, Universidade Estadual Paulista "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
| | - F L B Feitosa
- Departamento de Zootecnia, Universidade Estadual Paulista "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
| | - R B Costa
- Departamento de Zootecnia, Universidade Estadual Paulista "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
| | - I D P S Diaz
- Departamento de Zootecnia, Universidade Estadual Paulista "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
| | - D F Cardoso
- Departamento de Zootecnia, Universidade Estadual Paulista "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
| | - R L Tonussi
- Departamento de Zootecnia, Universidade Estadual Paulista "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
| | - F Baldi
- Departamento de Zootecnia, Universidade Estadual Paulista "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
| | - L G Albuquerque
- Departamento de Zootecnia, Universidade Estadual Paulista "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
| | - H N Oliveira
- Departamento de Zootecnia, Universidade Estadual Paulista "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
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Souza FRP, Mercadante MEZ, Fonseca LFS, Ferreira LMS, Regatieri IC, Ayres DR, Tonhati H, Silva SL, Razook AG, Albuquerque LG. Assessment of DGAT1 and LEP gene polymorphisms in three Nelore (Bos indicus) lines selected for growth and their relationship with growth and carcass traits. J Anim Sci 2009; 88:435-41. [PMID: 19820053 DOI: 10.2527/jas.2009-2174] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The aim of this study was to analyze LEP and DGAT1 gene polymorphisms in 3 Nelore lines selected for growth and to evaluate their effects on growth and carcass traits. Traits analyzed were birth, weaning, and yearling weight, rump height, LM area, backfat thickness, and rump fat thickness obtained by ultrasound. Two SNP in the LEP gene [LEP 1620(A/G) and LEP 305(T/C)] and the K232A mutation in the DGAT1 gene were analyzed. The sample consisted of 357 Nelore heifers from 2 lines selected for yearling weight and a control line, established in 1980, at the Estação Experimental de Zootecnia de Sertãozinho (Sertãozinho, Brazil). Three genotypes were obtained for each marker. Differences in allele frequencies among the 3 lines were only observed for the DGAT1 K232A polymorphism, with the frequency of the A allele being greater in the control line than in the selected lines. The DGAT1 K232A mutation was associated only with rump height, whereas LEP 1620(A/G) was associated with weaning weight and LEP 305(T/C) with birth weight and backfat thickness. However, more studies, with larger data sets, are necessary before these makers can be used for marker-assisted selection.
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Affiliation(s)
- F R P Souza
- Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, 14884-900, Jaboticabal, São Paulo, Brazil
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Dentillo DB, Souza FRP, Meola J, Vieira GS, Yazlle MEHD, Goulart LR, Martelli L. No evidence of association of MUC-1 genetic polymorphism with embryo implantation failure. Braz J Med Biol Res 2008; 40:793-7. [PMID: 17581677 DOI: 10.1590/s0100-879x2007000600007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2006] [Accepted: 04/18/2007] [Indexed: 11/22/2022] Open
Abstract
Pregnancy loss can be caused by several factors involved in human reproduction. Although up to 50% of cases remain unexplained, it has been postulated that the major cause of failed pregnancy is an error of embryo implantation. Transmembrane mucin-1 (MUC-1) is a glycoprotein expressed on the endometrial cell surface which acts as a barrier to implantation. The gene that codes for this molecule is composed of a polymorphic tandem repeat of 60 nucleotides. Our objective was to determine if MUC-1 genetic polymorphism is associated with implantation failure in patients with a history of recurrent abortion. The study was conducted on 10 women aged 25 to 35 years with no history of successful pregnancy and with a diagnosis of infertility. The control group consisted of 32 patients aged 25 to 35 years who had delivered at least two full-term live children and who had no history of abortions or fetal losses. MUC-1 amplicons were obtained by PCR and observed on agarose and polyacrylamide gel after electrophoresis. Statistical analysis showed no significant difference in the number of MUC-1 variable number of tandem repeats between these groups (P > 0.05). Our results suggest that there is no effect of the polymorphic MUC-1 sequence on the implantation failure. However, the data do not exclude MUC-1 relevance during embryo implantation. The process is related to several associated factors such as the mechanisms of gene expression in the uterus, specific MUC-1 post-translational modifications and appropriate interactions with other molecules during embryo implantation.
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Affiliation(s)
- D B Dentillo
- Departamento de Genética, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
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Cardoso G, Guimarães H, Lopes R, Leal P, Resque A, Guedes C, Souza F, Machado F, Amaral J. Crit Care 2005; 9:P79. [DOI: 10.1186/cc3623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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