Heterosis Effects in Crinkled Leal. Heterozygotes in Gossypium arboreum L.

Abstract

The inheritance of crinkled leaf '-a new abnormal mutant spotted as a rogue in the seventh generation of an inter-racial cross in G. arboreum L. viz. indicum s cernuum was reported carlier (Balasubrahmanyan and Santhanam, 1951). This type which was characterised by abnormal leaf crinkles, gave monofactorial inheritance in crosses with normal-leaved parents. The F.1 exhibited partial dominance for leaf crinkling with intermediate grades of crinkled leaves and the F.2 segregated in the ratio of. 1:2:1 respectively for normal, F. 1 and crinkled phenotypes. Both the parental classes bred true in the F. 3 while the intermediates' again threw out the three phenotypes in the ratio of 1:2:1. It was sought to study heterosis effects, if any, in a segregating population drawn from the crinkled leaf crosses, as the three geno- types were morphologically distinguishable here.. In wheat, Granhall (1949) utilised a similar advantage in recognising heterozygous half- bearded plants in a population for the beardness factor and found that the heterozygotes in the F.2 were on an average more, vigorous than the beardless' and bearded', parental class of segregates.

DOI

https://doi.org/10.29321/MAJ.10.A04367

Pages

444 - 447

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.

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