Madras Agricultural Journal
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Research Article | Open Access | Peer Review

HETEROSIS AND COMBINING ABILITY STUDIES IN INTER-VARIETAL CROSSES OF CHEWING TOBACCO (Nicotiana tabacum L.)

Volume : 76
Issue: Nov-nov
Pages: 616 - 620
Published: September 22, 2023
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Abstract


Six elite chewing tobacco varieties were evaluated for heterosis and combining ability for yield and yield component characters F1- 11 (1-115 x VR-2) and F1-13 (PV-7 x VR-2) recorded maximum heterotic vigour of 14.7% and 17.4% increase over the better parent in total yield and whole leaf yield respectively. The variances of general combining ability (gca) were significant for whole leaf, total yield and leaf area and in general, variance of specific combining ability (sca) were not significant for any character. The magnitude of gca was higher than that of sca indicating predominance of additive gene action. 1-64 and PV-7 showed positive and high gca effects and these are ideal parents for future breeding programmes for chewing tobacco crop improvement.

DOI
Pages
616 - 620
Creative Commons
Copyright
© The Author(s), 2025. Published by Madras Agricultural Students' Union in Madras Agricultural Journal (MAJ). This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited by the user.

Keywords


Chewing tobacco Heterosis Combining ability.
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