Vol. 7, Issue 2 (2019)
Combining ability and heterosis for yield contributing and quality traits in medium maturing inbred lines of maize (Zea mays L.) using line x tester
Author(s): Sawan Kumar, Uttam Chandel, Satish Kumar Guleria and R Devlash
Abstract: Sixty crosses of maize were developed through Line x Tester design using two male testers and thirty medium maturing female inbred lines. These 60 crosses along with parents and two commercial checks, viz., Bio 9544 and Palam Sankar Makka-2 were evaluated during Kharif 2016. The mean square due to parents, crosses and parents v/s crosses were significant for all the traits, except, days to 75% brown husk. The ratio of σ2 GCA/σ2 SCA was less than one for all the traits except plant height. This indicated that the preponderance of non-additive gene effects in the inheritance of these traits. Among female inbred lines, L28 was observed to be a good general combiner for grain yield, cob length, biological yield and protein content. Tester T1 was found to be a good general combiner for 1000 grain weight, biological yield and protein content whereas tester T2 for grain yield, cob girth, harvest index, plant height and cob placement. High level of heterosis over best check was observed for yield contributing and quality traits. Three cross combinations L28 × T2, L15 × T2 and L23 × T1 were identified most promising on the basis of their per se performance, SCA effects and significant heterosis for different traits mainly for yield and earliness indicated potential for exploiting hybrid vigour in breeding programme and might be used for obtaining high yielding maize hybrids.
Pages: 2027-2034 | 427 Views 69 Downloads
download (9483KB)
How to cite this article:
Sawan Kumar, Uttam Chandel, Satish Kumar Guleria, R Devlash. Combining ability and heterosis for yield contributing and quality traits in medium maturing inbred lines of maize (Zea mays L.) using line x tester. Int J Chem Stud 2019;7(2):2027-2034.
