Frequency of heterotic hybrids in relation to parental genetic divergence and general combining ability in blackgram [Vigna mungo (L.) Hepper]

DOI: 10.18805/LR-3916    | Article Id: LR-3916 | Page : 595-602
Citation :- Frequency of heterotic hybrids in relation to parental genetic divergence and general combining ability in blackgram [Vigna mungo (L.) Hepper].Legume Research-An International Journal.2019.(42):595-602
K.M. Boraiah, M. Byregowda, C.M. Keerthi, H.P. Vijayakumar, S. Ramesh and Mary Reena bors_km@yahoo.co.in
Address : AICRP on Pigeonpea, ZARS, University of Agricultural Sciences, Gandhi Krishi Vignana Kendra, Bengaluru-560 065, Karnataka, India.
Submitted Date : 17-07-2017
Accepted Date : 15-10-2018

Abstract

An investigation was carried out to test the predictability of frequency of heterotic hybrids based on parental gca effects and genetic diversity in blackgram. The 40 F1s effected using 10 lines and 4 testers were evaluated along with their parents for 10 productivity per set raits. The overall gca status (high and low) of each parent and overall sca and heterotic status (high and low) of each hybrid across 10 traits were determined. Based on overall gca status and genetic divergence of parents, the hybrids were grouped into different classes. The hybrids involving parents contrasting for overall gca status and/or those involving parents with intermediate genetic divergence were more frequently heterotic than those involving comparable gca status and with extreme genetic divergence. It is hence, desirable to involve parents with intermediate genetic divergence and contrasting gca effects to recover higher frequencies of heterotic hybrids for productivity per se traits in blackgram. 

Keywords

Blackgram Genetic divergence Gca status Hybrid sca status.

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