Inheritance Studies of Quantitative Characters in Upland Cotton
Dec 21, 2018

WCRC WCRC2 Breeding

Before any efficient breeding methodology can be developed it is necessary to analyze the genetic architecture of quantitatively inherited characters like yield and its components. Understanding the nature of gene action involved in the expression of a character is helpful in deciding the breeding procedure to be used for improvement of that character. Genetic analysis was performed through sequential model fitting to analyze the variation among generations derived from a cross of two diverse parents, MU-2 and Rs-453, for seed cotton yield per plant, number of bolls per plant, boll weight, ginning out turn and lint index. The analysis indicated the presence of both additive and non-additive genetic effect. Epistasis was found to be important in controlling the genetic effect for most characters. The magnitude of non-additive genetic component was found to be significant for number of bolls per plant, ginning outturn and lint index. Performing bi-parental mating in early segregating populations would facilitate simultaneous exploitation of additive and non-additive gene effects to achieve improvement in the characters

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