Abstract

Rajkumar S and Ibrahim S. M

The investigation was carried out under aerobic condition using the line x testers mating design and studied for yield and its components traits. The objective of this study was carried out to identify the best combining parents and their hybrids suitable for aerobic cultivation. One hundred and thirty six hybrids along with eight lines, seventeen testers and one check CORH 3 were raised in randomized block design with two replications under aerobic condition. Nineteen hybrids showed desirable performance for all the yield traits. However, most of the hybrids involving aerobic and upland genotype as male parent exhibited hybrid vigor for yield and its component traits. Parental lines of the hybrids also had high per se performance for grain yield. Out of nineteen hybrids, five hybrids viz., IR 68897 A x MAS – 946 -1, IR 68888 A x BI 33, IR 58025 A x IR 65912 R, IR 68888 A x MAS 26, TNAU CMS 2A x Vandana advocated for commercial exploitation since grain yield with its contributing characters manifested significantly for standard heterosis. Among this hybrid standard heterosis ranged from 78.77 percent in grain yield to -15.33 percent in flowering duration and showed marked variation in the expression of standard heterosis for yield component traits. Finally these hybrids as well as parents can be commercially exploited under aerobic condition.