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A two years (2005-2006) data analysis based on agronomic, qualitative, climatic and edaphic factors was carried out using ten grass pea (Lathyrus sativus L.) genotypes grown at five eco-divergent locations (Alem Tena, Debre Zeit, Denbi, Akaki, Chefe Donsa) in Ethiopia. Crop yield showed considerable variability among locations, years and genotypes. Path coefficient analysis indicated that rainfall and days to maturity have a large positive influence on yield. High level of micronutrients Mn(2+) and S(2-) negatively affected yield. Path analysis revealed that Zn(2+)/P, days to maturity, yield and K(+) were dominant variables affecting the response variable beta-ODAP (beta-N-oxalyl-L-alpha,beta-diaminopropionic acid), the neuro-excitatory amino acid in grass pea seeds considered as the cause of neurolathyrism. Linear correlation analysis between beta-ODAP and the 35 factors considered showed that beta-ODAP level was positively correlated (r > 0.70) with K(+) and sunshine hours (ssh) and negatively correlated (r < 0.70) with soil pH, days to maturity and yield. The strongest correlation of ssh with beta-ODAP level was found during the phase of crop maturity. Our results suggest that beta-ODAP biosynthesis and its response to environmental stress are maximized during the post-anthesis stage.
Ethiopian Institute for Agricultural Research, Debre Zeit Center, P.O. Box 32, Debre Zeit, Ethiopia.
This article was published in the following journal.
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A multifactorial disease of CATTLE resulting from complex interactions between environmental factors, host factors, and pathogens. The environmental factors act as stressors adversely affecting the IMMUNE SYSTEM and other host defenses and enhancing transmission of infecting agents.
A genus of leguminous herbs or shrubs whose roots yield GLYCYRRHETINIC ACID and its derivatives, CARBENOXOLONE for example. Licorice toxicity is manifested as hypokalemia, low blood potassium. Licorice is used as flavoring and aromatic in pharmaceuticals and as candy.
A plant genus in the family FABACEAE known for LATHYRISM poisoning.
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