Genetic Mapping of Loci underlying Field Resistance to Soybean Sudden Death Syndrome (SDS)

The objectives of this work were to evaluate two greenhouse screening methods for sudden death syndrome (SDS) and to determine which one is best correlated with field resistance of soybean genotypes. The evaluations were done with three sets of genotypes that were classified as partially resistant, intermediate, and susceptible to SDS based on previous field evaluations. These three sets were independently evaluated for greenhouse SDS reactions using cone and tray inoculation methods. Plants were infected using grains of white sorghum [Sorghum bicolor (L.) Moench] infested with Fusarium solani f. sp. glycines. Foliar symptom severity was rated 21 days after emergence. The cone and field SDS ratings were significantly correlated and ranged from 0.69 for set 1 to 0.51 for set 3. Correlations of SDS ratings of genotypes between field and greenhouse tray ratings were significant for set 1 and not significant for set 2. The cone method showed the highest correlation with field results and is recommended to screen soybean genotypes for SDS resistance.

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Common loci underlie field resistance to soybean sudden death syndrome in Forrest, Pyramid, Essex, and Douglas

Theoretical and Applied Genetics ◽

10.1007/s001220100682 ◽

2002 ◽

Vol 104 (2) ◽

pp. 294-300 ◽

Cited By ~ 73

Author(s):

V. N. Njiti ◽

K. Meksem ◽

M. J. Iqbal ◽

J. E. Johnson ◽

My. A. Kassem ◽

...

Keyword(s):

Sudden Death ◽

Field Resistance ◽

Sudden Death Syndrome

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Two Additional Loci underlying Durable Field Resistance to Soybean Sudden Death Syndrome (SDS)

Crop Science ◽

10.2135/cropsci1996.0011183x003600060044x ◽

1996 ◽

Vol 36 (6) ◽

pp. 1684-1688 ◽

Cited By ~ 41

Author(s):

S. J. C. Chang ◽

T. W. Doubler ◽

V. Kilo ◽

R. Suttner ◽

J. Klein ◽

...

Keyword(s):

Sudden Death ◽

Field Resistance ◽

Sudden Death Syndrome

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Diet, total plasma homocysteine concentrations and mortality rates in broiler chickens

Canadian Journal of Animal Science ◽

10.4141/a02-029 ◽

2003 ◽

Vol 83 (3) ◽

pp. 601-604 ◽

Cited By ~ 1

Author(s):

S. E. Samuels

Keyword(s):

Cardiovascular Disease ◽

Sudden Death ◽

Broiler Chickens ◽

Independent Risk Factor ◽

Total Mortality ◽

Mortality Rates ◽

Plasma Homocysteine ◽

Sudden Death Syndrome ◽

Total Plasma ◽

Elevated Plasma

The aim of this study was to determine if total plasma homocysteine (HCY) concentrations and mortality rates due to ascites syndrome and (AS) sudden death syndrome (SDS) in broiler chickens could be lowered by diet. Elevated plasma HCY is an independent risk factor for cardiovascular disease in humans. A total of 828 day-old male broiler chickens (Arbor Acre) were fed, for 6 wk, either a basal practical diet or one supplemented with excess vitamins B6 and B12, folic acid and betaine to stimulate the degradation of HCY. The supplemented diet decreased plasma HCY by 17% (P < 0.05; n = 16 per diet). Total mortality due to AS and SDS was 18% lower in the supplemented diet but this difference was not statistically significant. Key words: Homocysteine, folate, chickens, cardiovascular disease, ascites, sudden death syndrome

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