Effect of pre-anthesis water stress on growth, photosynthesis and yield of six wheat cultivars differing in drought tolerance
2001
Rane, J. (Directorate of Wheat Research, Karnal (India)) | Maheshwari, M. (Indian Agricultural Reserach Institute, New Delhi (India). Nuclear Research Laboratory) | Nagarajan, S. (Indian Agricultural Reserach Institute, Karnal (India). Regional Station)
Six wheat genotypes differing in relative drought tolerance were used to study the effects of pre-anthesis water deficits on photosynthesis, growth and yield. The results indicated that pre-anthesis water deficit affects adversely the main shoot grain yield of most of the cultivars tested. The stress-induced reduction in main shoot grain yield could not be explained by the effects on photosynthesis. The lower yields under pre-anthesis drought stress were due to reduction in both grain number and grain weight. C 306 among the tall types and Kundan among the dwarf types compensated better for the yield loss in main shoot by their tiller grain yield.
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