PJB-2018-948
MORPHO-PHYSIOLOGICAL INDICATORS FOR SELECTION OF HIGH YIELDING COTTON (Gossypium hirsutum L.) CULTIVARS
Muhammad Saad
Abstract
Cotton has great agro-economic value throughout the world. The morpho-physiological selection is needed in present cotton crop scenario for the efficient breeding program. The present study was focused to investigate the morpho-physiological selection and linkage in between traits. There were 20 cotton genotypes grown using randomized complete block design with two replications at the experimental area of the Cotton Research Institute, Multan during the year 2017. The analysis of variance had showed significant variation for all the studied traits. The genotypic coefficient of variance (GCV), phenotypic coefficient of variance (PCV), heritability and genetic advance values were higher for the traits bolls per plant, sympodial branches per plant and plant height respectively. These traits were more under control of genetic factors and additive gene action was governed. The correlation showed boll weight, net photosynthesis rate and seed cotton yield to be closely linked with each other. There was high significant correlation between boll weight and seed cotton yield. The transpiration rate and stomatal conductance also showed high significant correlation. The variability and association studied in genotypes present selection criteria that can be used in future breeding programs for development of high yielding genotypes. There would be yield breakthrough with the higher number of bolls, high boll weight and optimum net photosynthesis putting as basis of selection.
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