DefinePK

Abstract

The current experiment was conducted to evaluate the genetics for earliness and yield traits in upland cotton (Gossypium hirsutum L.) during Kharif season 2013 at Cotton Section, Agriculture Research Institute, Tandojam. The experiment was laid out in a randomized complete block design with three replications. The  experiment consisted of fifteen genotypes in which ten F1 were developed from five parents crossed in a 5 x 5 diallel matting design for days to 1st flower, bolls formed at 90 days after planting, bolls opened at 90 days after planting, plant height (cm), sympodial branches plant-1, bolls plant-1, boll weight (g) and seed cotton yield plant-1 (g). The genotypes were significantly different (P≤0.05) for days to 1st flower, bolls formed at 90 days after planting, bolls opened at 90 days after planting, plant height, sympodial branches plant-1, bolls plant-1 and seed cotton yield plant-1. Among the genotypes, Sindh-1, CRIS-134 and Shahbaz  were  best general combiners for days to 1st flower, bolls formed at 90 days after planting, bolls opened at 90 days after planting, plant height, sympodial branches plant-1, bolls plant-1, boll weight and seed cotton yield plant-1. The F1 hybrids Sadori x Sindh-1, Shabaz x Haridost, Sadori  x CIM-496 were best specific combiners for all the characters studied. The F1 hybrids Shahbaz x Sindh-1, Sadori x Sindh-1, Sadori x Haridost and Sadori x CIM-496 gave higher heterotic effects for all the studied traits.
Keywords: Earliness; Diallel; Seed cotton yield; Upland cotton; Earliness traits
http://dx.doi.org/10.19045/bspab.2017.60008