Screening of cotton genotypes for yield traits under different irrigation regimes
2016
Memon, S. (Agriculture Research Inst., Tandojam (Pakistan). Cotton Section) | Jatoi, W.A. (Agriculture Research Inst., Tandojam (Pakistan). Cotton Section) | Chandio, G.M. (Agriculture Research Inst., Tandojam (Pakistan). Cotton Section)
Cotton is a drought sensitive crop, because of less capable water consumer. Nevertheless, cotton has physiological mechanism to adopt semi-arid climate, such as deep penetrating root systems. The leaves and fruit that can shed when plants are stressed under a flexible fruiting period. The experimental trial was conducted at the experimental area of Cotton Section, Agriculture Research Institute Tandojam during 2012. Ten genotypes viz. Hari dost, Sindh-1, Shahbaz-95, Malmal, Star-2, TS-501, H-71, H-121, H-122 and IR-3701 were sown in a split plot design having four replications. Three treatments including T1; Control, T2; five irrigations and T3; three irrigations for drought tolerance were studied. Plant height (cm), sympodial branches per plant, bolls per plant, boll weight (g) and seed cotton yield per plant (g) were evaluated. The mean squares from analysis of variances showed that genotypes differed significantly for plant height, bolls per plant, sympodial branches per plant, boll weight and seed cotton yield per plant. Mean squares also showed that irrigation regimes cause significant impact on the yield traits. The genotypes Sindh-1, Shahbaz-95 and Star-2 performed well over the irrigation regimes for yield traits and pronounced minimum yield losses under less number of irrigations; hence selection could be made from these genotypes for developing drought tolerant cotton genotypes.
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