HETEROSIS AND INBREEDING DEPRESSION FOR GRAIN YIELD AND ITS COMPONENT TRAITS IN RICE (Oryza sativa L)

S.K. PATEL¹*, M.G. MAKWANA², J.M. PATEL³, C.R. PATEL^4
1Wheat Research Station, Vijapur, 382870, Sardarkrushinagar Dantiwada Agricultural University, Sardarkrushinagar, 384 570, Gujarat
²Main Rice Research Station, Nawagam, 387 540, Anand Agricultural University, Anand, 388110, Gujarat, India
³Wheat Research Station, Vijapur, 382870, Sardarkrushinagar Dantiwada Agricultural University, Sardarkrushinagar, 384 570, Gujarat
⁴Wheat Research Station, Vijapur, 382870, Sardarkrushinagar Dantiwada Agricultural University, Sardarkrushinagar, 384 570, Gujarat
* Corresponding Author : shashi.patel141@gmail.com

Received : 01-07-2019     Accepted : 25-07-2019     Published : 30-07-2019
Volume : 11     Issue : 7       Pages : 615 - 617
Genetics 11.7 (2019):615-617

Keywords : Rice, Oryza sativa, Relative heterosis, Heterobeltiosis, Inbreeding depression
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Main Rice Research Station, Nawagam, 387 540, Anand Agricultural University, Anand, 388110, Gujarat.
Author Contribution : All authors equally contributed

The present investigation was undertaken with a view to generate genetic information on heterosis and inbreeding depression for grain yield and its component traits in four hybrid of rice (Oryza sativa L). Hybrids showed higher mean performance than their parents for almost all the characters. Both positive and negative heterosis were observed amongst the hybrids. The expression of heterosis varied with the crosses and characters. Two crosses Gurjari × IR – 64 was identified for exploitation of heterosis and to isolate desirable segregants in later generations. Grains per panicle played important role in the expression of heterosis.

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