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Plant traits and yield stability of dry bean (Phaseolus vulgaris) cultivars under drought stress

Published online by Cambridge University Press:  27 March 2009

J. A. Acosta-Gallegos  and
M. W. Adams
J. A. Acosta-Gallegos
Affiliation:
Food Legume Program, INIFAP, Apdo. Postal 20, Pabellon, Ags., 20660, Mexico
M. W. Adams
Affiliation:
Crop and Soil Sciences Department, Michigan State University, 374 PSSB, East Lansing, MI 48824, USA
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Summary

The objective of this study was to identify traits related to growth and yield response under drought stress in the field which would show less variation than yield itself. Experiments were conducted in 1987, at Durango, Mexico and at Michigan, USA. Twenty-six dry bean genotypes were sown under supplementary irrigation and terminal drought stress. Plant samples were taken at 50% flowering, mid-pod-filling and physiological maturity. At both sites, leaf expansion rate and crop growth rate at mid-pod-filling were greatly reduced by drought stress, resulting in significant reductions in total dry matter (DM) above ground and seed yield at physiological maturity. Because of differences in the timing and intensity of the drought stress, the yield components were affected differently at each location. Total DM content at physiological maturity, harvest index and number of pods/m2 were the only traits positively correlated with yield under stress at both locations. In order to evaluate a group of genotypes for adaptation to drought on the basis of seed yield, the genotypes should be grouped according to their phenological characteristics to stress them evenly.

Type
Crops and Soils
Information
The Journal of Agricultural Science , Volume 117 , Issue 2 , October 1991 , pp. 213 - 219
Copyright
Copyright © Cambridge University Press 1991

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References

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