Manifestation of heterosis in bread wheat under irrigated and drought stress conditions
2000
Subhani, G.M. (Wheat Research Inst., AARI, Faisalabad (Pakistan)) | Chowdhry, M.A. | Gilani, S.M.M.
Six high yielding and rust resistant bread wheat parents were crossed in a diallel fashion to get all possible combinations (30 crosses). Heterosis and heterobeltiosis analysis was performed for morpho-physiological traits like, stomatal frequency, leaf venation, flag leaf area, specific flag leaf weight, days to heading, tillers per plant, plant height, spike length, grains per spike, 1000- grain weight, biomass per plant and grain yield per plant under irrigated and drought stress conditions. Significant mid and better parent heterosis values were observed in certain single crosses for all traits under both environments. The maximum heterosis of 36.39, 15.17 and 12.54 per cent was noted for grain yield per plant, tillers per plant and spike length, respectively, in cross LU26S X Roh.90 under irrigated conditions, whereas cross combination Inq.91 X 4072 manifested maximum heterosis and heterobeltiosis for 1000-grain weight under irrigated and drought stress conditions. The presence of heterosis suggests that high yielding wheat hybrids can be developed.
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