HETEROSIS AND GENETIC ARCHITECTURE OF OIL CONTENT IN CASTOR (Ricinus communis L.)

Abstract

Heterosis and genetic architecture of oil-content in castor (Ricinus communis L.) was studied in a complete diallel set of 11 parents excluding reciprocals. Twenty-five and thirteen crosses, respectively, exhibited significant heterosis over mid parent and better parents. The analysis of variance for combining ability indicated the importance of both additive and non-additive gene-action, however, non-additive gone action was predom- nant, for the inheritance of this trait. The varieties viz, 2-73-11, T-4, 1-21 and Mesalio were the botter general combiners. The crosses viz, "Aruna x HC-8", "Aruna x VI-9" "Aruna x Masalio", "279 x 2-73-11", "279 x Masalio", "Ho HC-8", "Ho x 2-73-11", "Ho x T-4", "413A x VI-9", "413A x Masalio", "1-21 x 2-73-11", "1-21 x T-4", "2-73-11 xvi 9" and "VI-9 x Masalio" possessed higher mean values, significant heterosis, and higher and significant positive SCA effects which can best be exploited for developing higher ail- varieties in castor through further breeding.

DOI

https://doi.org/10.29321/MAJ.10.A02278

Pages

328 - 333

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