Abstract:
Inheritance pattern of some polygenic characters were studied in 5 x 5 F1 diallel hybrids
and their parents of upland cotton. 20 F1 hybrids and their parents were grown in field under
randomized complete block design at experimental area of the Department of Plant Breeding
and Genetics, University of Agriculture, Faisalabad. Diallel analysis was used to determine the
mode of gene action and genetic components for various yield related traits like plant height,
monopodial branches plant-1, sympodial branches plant-1, bolls plant-1, boll weight and seed
cotton yield plant-1. Results of regression coefficients showed that all the characters were fit for
genetic analysis. Additive type of gene action with partial dominance and over dominance were
involved for the expression of the traits studied. Results suggested that these characters can be
improved through appropriate selection method or by hybrid development.
