Assessment of the effects of water stress on seed yield of common bean genotypes
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Date
2020
Journal Title
Journal ISSN
Volume Title
Publisher
African Journal of Agricultural Research
Abstract
Drought stress is among the most important abiotic factors that contribute to the significant yield
reduction of common bean (Phaseolus vulgaris L.). Due to unreliable and poor distribution of rainfall,
drought tolerance has become the important train in common bean in bean growing areas. The
objective of this study was to evaluate 16 common bean genotypes for drought tolerance under three
moisture regimes and identify genotypes with specific traits that improved tolerance to drought that
could be recommended for released and become useful parents in the breeding programs. The
experiment was conducted in Maruku, Bukoba under screen- house. Based on the drought stress
indices which includes drought tolerance index (DTI), Harvest Index (HI) SMC 162, DAB 602, SSIN 1128,
DAB 378, DAB 362 and SMR 101 had performed better than other tested genotypes. Also, the results
showed that genotypes DAB 582, SRC 59, DAB 602, SSIN 1240, SMC 24, SMR 101 and DAB 362 were
drought tolerant with lower and high value of the DSI and YSI respectively. Therefore, the later
genotypes can be used in the future breeding programs as the parent for drought tolerance and also
can used as a new varieties by farmers.
Description
Journal article
Keywords
Moisture stress, Seed yield, Drought, Common bean