Combining ability analysis for yield and related traits in rice (Oryza sativa L.)

Abstract

Study of combining ability was conducted on 12 F 1 hybrids along with seven rice genotypes to know the pattern of inheritance of some morphological traits for selecting superior genotypes. The experiment was carried out and crossing programme initiated in line x tester mating design during Post rainy season 2013-14 and subsequently hybrids along parents were evaluated during rainy season 2014. Analysis of variance for combining ability revealed highly significant mean square for all the characters due to interaction between parents vs. crosses indicating wide difference among hybrids. The greater magnitude of SCA variance then GCA variance indicated the role of non additive gene action. RDR-884 identified as good general combiner for grain yield as well as other desirable traits like earliness, panicle length, 1000 grain weight. While the cross combinations viz., JGL-11470 x JGL-3844 and JGL-1798 x WGL-283 with good per se performance and significant SCA effect for yield and yield components may be exploited by involving them multiple cross breeding programme for obtaining transgressive segregants and broad genetic base population in rice yield improvement.

Combining ability and heterosis for yield and grain quality characters in rice (Oryza sativa L.)

“…,Pradhan et al (2006),Rashid et al (2007),Saleem et al (2010) andSaidaiah et al (2010).The traits with non-additive gene action can be further subjected to heterosis breeding. Many researchersSaidaiah et al (2010),Singh et al (2020) andSandhyakishore et al (2017) have reported the predominance of non-additive gene action for the above-mentioned traits. In the case of additive gene action,Widyastuti et al (2017) andZewdu et al (2020) suggested pureline selection or pedigree breeding improve the traits.…”