Premium
Improving adaptation to drought stress in white pea bean ( Phaseolus vulgaris L.): Genotypic effects on grain yield, yield components and pod harvest index
Author(s) -
Assefa Teshale,
Rao Idupulapati M.,
Can Steven B.,
Wu Jixiang,
Gutema Zenbaba,
Blair Matthew,
Otyama Paul,
Alemayehu Fitsume,
Dagne Belete
Publication year - 2017
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/pbr.12496
Subject(s) - phaseolus , point of delivery , biology , legume , agronomy , yield (engineering) , crop , drought tolerance , horticulture , grain yield , drought stress , metallurgy , materials science
Common bean ( Phaseolus vulgaris L.) is the most important food legume crop in Africa and Latin America where rainfall pattern is unpredictable. The objectives were to identify better yielding common bean lines with good canning quality under drought, and to identify traits that could be used as selection criteria for evaluating drought‐tolerant genotypes. In all, 35 advanced lines were developed through single seed descent and evaluated with a standard check under drought and irrigated conditions at two locations over 2 years in Ethiopia. Grain yield ( GY ), pod number per m 2 , seed number per m 2 and seed weight decreased by 56%, 47%, 49% and 14%, respectively, under drought stress. Eight genotypes had better yield with good canning quality under drought compared to the check. Moderate to high proportion of genetic effects were observed under drought conditions for GY and yield components compared to genotype × environment effects. Significant positive correlations between GY and pod harvest index ( PHI ) in drought suggest that PHI could be used as an indirect selection criterion for common bean improvement.