Concepts of breeding derived from experiments in peanut( Arachis hypogaea L.)

Arunachalam, V. (1993) Concepts of breeding derived from experiments in peanut( Arachis hypogaea L.). Journal of Oilseeds Research, 10 (1). pp. 70-80.

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The initial step of a breeding programme is as vital as the final improved yield desired by a breeder. An analysis of experimental evidence in the light of underlying genetic concepts suggests a choice of parents on genetic divergence given by a multivariate measure. Breeding programmes initiated from heterotic F1's envisage a greater probability of success in further generations compared to programmes initiated from any F1 including non-heterotic ones. Limits to parental divergence are therefore set to realize F1 heterosis. Large F2 populations of heterotic F1's need an ordering process to locate productive recombinants. A method of forming a ranked F2 distribution is suggested using values of a selection index based on physiological and yield components. Selection intensity of the order of 25% is most often adequate to derive desirable selection in F3 and superior lines in F5

Item Type: Article
Uncontrolled Keywords: Groundnut; Genetic Divergence; Breeding Selection; Recombination; Heterosis; Selection Intensity
Author Affiliation: Division of Genetics Indian Agricultural Research Institute, New Delhi 110012, India
Subjects: Statistics and Experimentation
Crop Improvement
Divisions: Groundnut
Depositing User: Mr T L Gautham
Date Deposited: 08 Sep 2013 12:19
Last Modified: 08 Sep 2013 12:19

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