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Yahya Abdullah Molaaldoila
A. M.S. Al-Hadi
E.M. Al-Mosanif
K.A.A. Al-Hakimi
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Yahya Abdullah Molaaldoila
A. M.S. Al-Hadi
E.M. Al-Mosanif
K.A.A. Al-Hakimi
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International Journal of Plant Breeding and Crop Science

Genotypic variation for agronomical and physiological traits affecting drought resistance in Common Bean (Phaseolus vulgaris L.)

Y.A.A. Molaaldoila, A.M.S. Al-Hadi, E.M. Al-Mosanif, K.A.A. Al-Hakimi

Department of Agronomy, Crop physiology, The Southern Highland Research Station, Taiz and Ibb, Yemen.

Plant production, Faculty of Agriculture and Vit. Med, IBB University, Yemen.

 The Agricultural Research and Extension Authority, Khormaksar, Aden, P. Yemen.

Accepted 22 May, 2015.

Citation: Molaaldoila YAA, Al-Hadi AMS, Al-Mosanif EM, Al-Hakimi KAA (2016). Genotypic variation for agronomical and physiological traits affecting drought resistance in Common Bean (Phaseolus vulgaris L.). International Journal of Plant Breeding and Crop Science, 3(1): 109-122.

 

Copyright: © 2016 Molaaldoila et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Abstract

The main objective of this study was to evaluate drought resistant genotypes previously developed in CIAT and local cultivars for yield traits and to identify agronomical and physiological traits associated with drought stress environments under the local environment in Yemen. The study materials were selected (16 genotypes) based on phenotypic, physiological traits and drought tolerance indexes in 2006 and 2007, then evaluated in 2008, 2009 and 2010 at three locations representing low rainfall drought (LRD) stress at the southern highland region (SHR) at Ibb – Yemen. Both experiments were subjected to medium to severe drought stress. Genotypes responded differently to drought stress and normal conditions; accordingly these bean genotypes categorized into four groups. The most important group, the group that includes MIB-154, MIB-155, Ser-72, BFB-141, SXB-416, Ser-111, Ser-88, NSL and Taiz-305 genotypes. This group expressed uniform superiority under both normal and drought conditions. The most important group, the group that includes MIB-154, MIB-155, Ser-72, BFB-141, SXB-416, Ser-111, Ser-88, NSL and Taiz-305 genotypes. This group expressed uniform superiority under both normal and drought conditions. Among phenotypic, physiological traits and drought tolerance indexes; delayed leaf senescence (DLS), growth recovery tolerance (LRT), grain filling index (GFI), seed production efficiency (SPE), stomatal conductance, early maturity and stress tolerance index (STI) were found to be the most suitable indices for screening bean lines for drought tolerance under both NS and SD environments as they were highly correlated with both (Yp) and (Ys). Moreover, stability indices analysis of the promising genotypes eight location x three years (2011, 2012 and 2013); proved that genotypes MIB-155, MIB-156, BFB-141, SXB-416  and NSL has high yields with low response indices.

Keywords: Delayed leaf senescence, growth recovery tolerance, grain filling index and stress tolerance index

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