Effects of timing of drought stress on phenology, yield and yield components of short-duration pigeonpea

Lopez, F B and Johansen, C and Chauhan, Y S (1996) Effects of timing of drought stress on phenology, yield and yield components of short-duration pigeonpea. Journal of Agronomy and Crop Science, 177 (5). pp. 311-320.

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Abstract

Nine short-duration pigeonpea cultivars were given adequate soil moisture throughout growth or subjected to water stress during the late vegetative and flowering (stress 1), flowering and early pod development (stress 2), or pod fill (stress 3) growth stages under field conditions at ICRISAT Centre, India. The stress 1 treatment had no significant effect on the time to flowering. The interval from a newly opened flower to a mature pod was about 30 days for all cultivars and was unchanged in plants that were recovering from stress 1 or undergoing stress 2. Seed yield was reduced to the greatest extent by stress 2 (by 37%) and not significantly affected by stress 3 in all the cultivars. No consistent differences were found between determinate and indeterminate cultivars in the ability to maintain seed yield under both stress 1 and stress 2. The harvest index was significantly reduced (22%) by stress 2 but not by stress 1. However, under each soil moisture treatment, cultivar differences for seed yield were associated largely with differences in total dry matter production (TDM). For all cultivars, the number of pods m-2 was the only yield component significantly affected by the water stress treatments. It is concluded that the stability of other yield components should be fully exploited to improve the stability of seed yield under drought conditions (drought resistance). Possible characteristics which may improve the drought resistance of short-duration pigeonpeas include the ability to maintain TDM, low flowering synchronization, small pod size with few seeds pod-1, and large 100-seed weight

Item Type: Article
Divisions: UNSPECIFIED
CRP: UNSPECIFIED
Subjects: Mandate crops > Pigeonpea
Depositing User: Mr B K Murthy
Date Deposited: 15 Nov 2011 09:13
Last Modified: 15 Nov 2011 09:13
URI: http://oar.icrisat.org/id/eprint/3926
Official URL:
Projects: UNSPECIFIED
Funders: UNSPECIFIED
Acknowledgement: UNSPECIFIED
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