Genome-wide association analysis permits characterization of Stagonospora nodorum blotch (SNB) resistance in hard winter wheat

Stagonospora nodorum blotch (SNB) is an economically important wheat disease caused by the necrotrophic fungus Parastagonospora nodorum. SNB resistance in wheat is controlled by several quantitative trait loci (QTLs). Thus, identifying novel resistance/susceptibility QTLs is crucial for continuous improvement of the SNB resistance. Here, the hard winter wheat association mapping panel (HWWAMP) comprising accessions from breeding programs in the Great Plains region of the US, was evaluated for SNB resistance and necrotrophic effectors (NEs) sensitivity at the seedling stage. A genome-wide association study (GWAS) was performed to identify single‐nucleotide polymorphism (SNP) markers associated with SNB resistance and effectors sensitivity. We found seven significant associations for SNB resistance/susceptibility distributed over chromosomes 1B, 2AL, 2DS, 4AL, 5BL, 6BS, and 7AL. Two new QTLs for SNB resistance/susceptibility at the seedling stage were identified on chromosomes 6BS and 7AL, whereas five QTLs previously reported in diverse germplasms were validated. Allele stacking analysis at seven QTLs explained the additive and complex nature of SNB resistance. We identified accessions (‘Pioneer-2180’ and ‘Shocker’) with favorable alleles at five of the seven identified loci, exhibiting a high level of resistance against SNB. Further, GWAS for sensitivity to NEs uncovered significant associations for SnToxA and SnTox3, co-locating with previously identified host sensitivity genes (Tsn1 and Snn3). Candidate region analysis for SNB resistance revealed 35 genes of putative interest with plant defense response-related functions. The QTLs identified and validated in this study could be easily employed in breeding programs using the associated markers to enhance the SNB resistance in hard winter wheat.

Use of a proximal humeral plate for a paediatric peri-prosthetic femoral fracture

In this case an 18-year-old female with cerebral palsy sustained a peri-prosthetic femoral fracture adjacent to a blade plate previously inserted for a femoral varus osteotomy. The injury was treated using a long proximal humeral locking plate. The existing blade plate was removed. The fracture was reduced and held, and a 10-hole PHILOS™ plate applied with near anatomical reduction. There were no post-operative complications. Radiographic union was confirmed at 11 months. To our knowledge, this is the first reported use of a PHILOS™ plate in the management of a femoral peri-prosthetic fracture and successfully demonstrated a straightforward method for revision fixation.

Malnutrition and iron deficiency in lactating women in urban slum communities from Addis Ababa, Ethiopia

OBJECTIVE

To determine the status of iron deficiency anaemia (IDA) and malnutrition in lactating women.

DESIGN

A cross-sectional study.

SETTING

Six urban slum communities in Teklehaimanot district, Addis Ababa.

SUBJECTS

One thousand and seventeen lactating women were enrolled and assessed for their haemoglobin (Hgb), serum ferritin level and body mass index (BMI) during the month of March 2001. Iron deficiency anaemia was considered when Hgb and serum ferritin concentrations were less than 12gm/dl and 12 microg/l respectively, whereas, a BMI less than 18.5% kg/m2 was considered malnourished.

MAIN OUTCOME MEASURES

Determinations of haemoglobin, serum ferritin and BMI measurements.

RESULTS

The overall prevalence of iron deficiency anaemia (IDA) and protein energy malnutrition in the slum communities was 22.3% and 27.1% respectively. The mean age of mothers (28.4 +/- 6.12 years) indicates that prevalence of malnutrition and iron deficiency anaemia was higher among younger mothers than among older mothers. The prevalence of malnutrition was positively correlated with the serum ferritin concentration status, of the mothers (r=0.12, p=0.2, RR=1.03).

CONCLUSION

It is observed that malnutrition and IDA are major health problems and therefore, an appropriate nutrition intervention package to improve the nutrition situation of the communities is recommended.

Daily versus weekly iron supplementation and prevention of iron deficiency anaemia in lactating women

OBJECTIVE

To demonstrate the effectiveness and social feasibility of weekly versus daily iron supplementation in preventing and treating iron deficiency anaemia among anaemic mothers.

DESIGN

A longitudinal in nature.

SETTING

Seven urban slum communities in Teklehaimanot Wereda, Addis Ababa, Ethiopia.

SUBJECTS

Two hundred seven eligible mothers were assigned to the daily supplementation, weekly supplementation or control groups following randomisation between March and May 2001. The daily supplemented groups (n=71) received 60 mg of elemental iron containing 300 mg ferrous sulphate and 400 microg folic acid from Monday to Friday. The weekly group (n=68) received one tablet once a week every Monday supervised while the control group (n=68) was advised to take no medications without the knowledge of the investigators until the completion of the study. To eliminate a major source of variation, subjects participating in the study were de-wormed at the beginning of the study.

MAIN OUTCOME MEASURES

Haemoglobin and serum ferritin concentrations were compared before and after the intervention among the groups.

RESULTS

The mean haemoglobin (Hgb), and serum ferritin concentration (SFC) at baseline were practically similar among the groups. Haemoglobin levels significantly increased at the end of the study in all the groups and the proportion of anaemia decreased from 6.9% to 1.6% in the daily, 6.7% to 1.7% in the weekly supplemented and 6.7% to 6.1% in the control groups. The difference noted between the daily and weekly supplemented groups was not significant. The improvement of SFC concentration was better in the daily than the weekly group but not statistically significant. Daily supplementation schedule caused more side effects and lower compliance level than the weekly supplementation schedule.

CONCLUSION

Weekly supplementation is simple, comparable to daily supplementation and economically advantageous. Thus, it is recommended to adopt the strategy for controlling anaemia. Further because of higher compliance rate and lower side effects, it is deemed to be socially feasible.

Retinopathy in patients of Tikur Anbessa Hospital diabetic clinic

A total of 302 diabetic patients were selected from regular attendants of the Tikur Anbessa Hospital (TAH) diabetic clinic to determine the prevalence of retinopathy from December 1994 to March 1995. The mean age was 41.4 +/- 14.4 years (range 14-85). There were 160 males (53%) and 142 females (47%). One hundred forty (46%) were type 1 and 162 (53.6%) were type 2. The mean duration of diabetes was 9.4 +/- 5.4 years and the mean Hemoglobin Alc (HbAlc) was 10.4 + 2.2%. On the day of the examination the mean fasting blood glucose (FBG) and random blood glucose (RBG) were 195.5 +/- 79.9 mg/dl and 273.1 +/- 114.5 mg/dl respectively. The mean serum total cholesterol, triglycerides, LDL, VLDL and GDL were 166.5 +/- 45.5 mg/dl, 129.9 +/- 92.4 mg/dl, 94.5 +/- 36.4 mg/dl, 24.4 +/- 15.1 mg/dl and 44.3 +/- 11.5 mg/dl respectively. The overall prevalence of retinopathy was 37.8% out of which 108 patients (36.1%) had background retinopathy and 5 patients (1.7%) had proliferative retinopathy. The retina could not be visualized in three patients because of dense cataract. Retinopathy correlated positively with age, duration of diabetes and blood pressure respectively, however no significant correlation was seen with mean total HgAlc and serum lipids. Prevalence of retinopathy was comparable in type 1 and type 2 (p > 0.05). The prevalence of retinopathy in our patients relative to the duration of diabetes mellitus is high. Therefore, improving facilities for the diagnosis and treatment of retinopathy is recommended.

Profile of coronary artery risk factors in Ethiopian diabetic patients

OBJECTIVES

To assess the coronary artery risk factors in Ethiopian diabetic patients.

DESIGN

A cross sectional study done on a representative sample of diabetic patients to evaluate the coronary risk factors.

SETTING

Hospital-based study.

SUBJECTS

A total of 302 diabetic patients randomly selected from the 3000 regularly attending diabetic patients in the Tikur Anbessa Hospital Diabetes Centre of whom 161(53.3%) were males, 141(46.7%) were females, 140(46.4%) were Type 1 and 162(53.6%) were Type 2.

OUTCOME MEASURES

Assessment of the coronary risk factors in diabetic patients.

RESULTS

There were 20(6.6%) smokers and no ex-smokers. All smokers were males of whom five (25%) were Type 1 and 15(75%) were Type 2. Hypertension and obesity were found in 64(21.2%) and 69(22.8%) patients respectively. Sixty one (20.2%) patients and 43(14.2%) patients had hypercholesterolaemia and hypertriglyceridaemia respectively.

CONCLUSION

Our diabetic patients share the risk factors for developing coronary artery disease like any other diabetic patient in the developed countries but at a lower level.

Interrelationship between vitamin A, iodine and iron status in schoolchildren in Shoa Region, central Ethiopia

A total of 14,740 schoolchildren in seven provinces of Shoa Administrative Region in Central Ethiopia were surveyed for the prevalence of goitre, xerophthalmia and anaemia. Haemoglobin and packed cell volume were assessed in 966 children in one province while an in-depth study was conducted on 344 children in the same province and two others. Goitre, xerophthalmia (Bitot's spots) and clinical anaemia were observed in 34.2, 0.91 and 18.6% respectively of the children. Most biochemical variables were within the normal range while those of haemoglobin (Hb), mean corpuscular Hb concentration (MCHC) and urinary I excretion were lower, and mean corpuscular volume, mean corpuscular Hb (MCH), and immunoglobulins G and M were higher. Hb was strongly correlated with retinol, ferritin, MCHC, MCH, packed cell volume and erythrocyte count while retinol formed a triad with transthyretin (TTR) and retinol-binding protein (RBP) which were all correlated with one another. Total and free thyroxin and total and free triiodothyronine were positively correlated as were the concentrations of the total and free hormones. Thyrotropin (TSH) was negatively correlated with total and free thyroxin and positively correlated with free triiodothyronine. Thyroxin and triiodothyronine in both free and combined forms were all correlated with thyroxin-binding globulin which in turn was negatively correlated with the triad retinol, RBP and TTR. The triad was also negatively correlated with C-reactive protein. Urinary I excretion was positively associated with total thyroxin and negatively associated with TSH. The anaemia found was not nutritional in origin but due to the effect of infestation with intestinal parasites and malaria.