National Academy of Agricultural Sciences (NAAS)
|
PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The present investigation was carried out to study heterosis, combining ability and gene interactions over environments of parents and their crosses in kharif 2018. The experimental material, consisting of eleven lines, five testers and their resultant 55 hybrids along with a commercial hybrid check ‘OH-102’ of okra were sown in three different locations of south Gujarat viz., College farm, NMCA, NAU, Navsari (E1), Cotton Research Sub Station, NAU, Achhalia (E2) and Regional Rice Research Station, NAU, Vyara (E3). Observations on sixteen traits were recorded for each and every location. The analysis of variances for individual as well as pooled over environments revealed considerable genetic variation present among the parents and their hybrids for all the traits under study. The hybrids viz., JOL-14-10 X Arka Abhay, JOL-14-10 X GJO-3 and JOL-13-05 X GJO-3 exhibited higher but non-significant standard heterosis for fruit yield at all locations. Non-significant but desirable standard heterosis for fruit yield and its component traits suggested that there is no scope of exploiting heterosis commercially, but the possibility of isolating desirable segregants among these hybrid combinations. The higher magnitude of non-additive variance was higher for fruit yield and its contributing traits revealed the preponderance of non-additive gene action for the majority of the traits, hence these traits can be improved through recurrent selection for specific combining ability or through heterosis breeding program. The estimates of gca effects indicated that parents viz., JOL-14-10, GJO-3 and JOL-13-05 were good general combiners for fruit yield and its contributing traits. None of the hybrids exhibited higher per se performance, sca effects and standard heterosis for fruit yield for all locations.
Citations |
 |
 |
 |
 |
