Georgina KOSTURKOVA, Rositsa TODOROVA, Krasimira TASHEVA, Margarita DIMITROVA

Screening of soybean against water stress mediated through polyethylene glycol

Anahtar Kelimeler:

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Screening of soybean against water stress mediated through polyethylene glycol

Glycine max (L.) Merrill is the world largest cultivated pulse crop, rich in protein and oil. Soybean provides phytoprotein to more than half of the world’s population and is desired wholesome and healthful food in many diet programs. Despite its global importance soybean production and grain quality suffer the problems of biotic/abiotic stress causing damages at all levels of cell and plant development. Hence, success in creating better adapted varieties depends upon the efforts of various scientific domains. Classical breeding have been enriched with up-to-date approaches and techniques. The objectives of the present study were to screen in vivo soybean genotypes and to find out relevant criteria for simple and quick identification of lines with higher drought tolerance. Different varieties and lines created by the authors were used. Various approaches for field and laboratory screening were applied creating water deficit in field and laboratory conditions. Data about the response of tested genotypes were obtained.Productivity of three (Srebrina, Richy and Daniela) out of four tested Bulgarian varieties was higher than the world standard Hodgson under non irrigated conditions indicating their higher drought tolerance.osmotic stress evaluated by water absorption by seeds soaked in PEG solution were more indicative in the period between 6th and 20th hour at 5% PEG. A tendency for correlation between drought tolerance in the field and root growth depression of seedlings in PEG solutions was observed.These data could be a basis for rapid preliminarytests for evaluation of drought tolerance of a great number of soybean genotypes

Keywords:

Glycine max, soyben, drought, in vivo in vitro,

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