Genetic components and Vr–Wr graphical analysis using a diallel set of crosses involved biotic stress tolerance parents in rice

To determine the genetic components of various agro-morphological and grain quality traits in rice, nine genotypes were crossed in diallel mating design. Vr–Wr graphical analysis and average degree of dominance revealed that presence of overdominance for all the studied traits, suggest that selectio...

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Bibliographic Details
Published in:Vegetos - International journal of plant research 2020-09, Vol.33 (3), p.430-434
Main Authors: Gunasekaran, Karthika, Sivakami, Rajeswari, Ponnaiah, Govintharaj, Sabariappan, Robin
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Life Sciences
Plant Anatomy/Development
Plant Breeding/Biotechnology
Plant Physiology
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Summary:To determine the genetic components of various agro-morphological and grain quality traits in rice, nine genotypes were crossed in diallel mating design. Vr–Wr graphical analysis and average degree of dominance revealed that presence of overdominance for all the studied traits, suggest that selection may be effective in a later generation. Estimates of genetic components such as D, H 1 and H 2 on traits under study were controlled by both additive and non-additive gene action. Narrow sense heritability was low for all the traits due to preponderance of non-additive gene action. These findings could help rice breeders to improve grain yield and contributing traits along with grain quality by appropriate selection.
ISSN:2229-4473
2229-4473
DOI:10.1007/s42535-020-00122-9