Studies on combining ability and gene action for grain yield, head rice recovery and other agronomic traits in rice (Oryza sativa L.)

DOI:10.37992/2025.1602.018

  • Muppani Maneesha, V. Gouri Shankar, B. Srinivas and Y. Hari

Abstract

For many Asian nations, rice (Oryza sativa L.) is staple food and major source of nutrition. To fulfil the demands of an expanding population the rice production must increase. High temperatures of about 38-42° C and low relative humidity (<40%) is recorded in Telangana in the months of April and May during which the rabi rice crop is at grain filling to maturity stage. These conditions result in low head rice recovery percentage of rabi rice produce. Selection is an important technique in plant breeding and breeders use this method for improving the architecture of a crop by management of available genetic variability (Kohnaki et al., 2013). Breeding strategies based on selection of hybrids require expected level of heterosis as well as specific combining ability. Combining ability analysis is one of the useful tools available to estimate the combining ability effects and aids in selecting the desirable parents and crosses for the exploitation of heterosis.Additionally, it helps in understanding the nature and extent of gene action in the inheritance of specific traits. The Line × Tester analysis method, proposed by Kempthorne in 1957, is the most commonly used approach for identifying general and specific combiners and to study the nature of gene action governing the inheritance of different characters. Therefore, the present research work was carried out to estimate the nature of gene action and combining ability effects of parents and crosses for grain yield and quality traits in rice based on their mean performance, genetic parameters and heterosis.

Keywords:Combining ability,grain yield, head rice recovery, line×tester

Published
04-07-2025
How to Cite
Muppani Maneesha, V. Gouri Shankar, B. Srinivas and Y. Hari

Studies on combining ability and gene action for grain yield, head rice recovery and other agronomic traits in rice Oryza sativa L.

. 2025. Electronic Journal of Plant Breeding, 16 2, 225-233. Retrieved from https://www.ejplantbreeding.org/index.php/EJPB/article/view/5277
Issue
Vol 16 No 2 (2025): EJPB
Section
Research Note

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