Line x tester analysis for combining ability studies in rice (Oryza Sativa L.)
KK Barhate, DN Borole, VV Bhavsar, PR Kore
An investigation to study the combining ability for eight characters in rice consisted of 36 F1s involving three cytoplasmic male sterile lines (CMS) and twelve diverse restorers in line x tester mating design in randomized block design (RBD) with three replications. None of the parental lines combined superior GCA for all the traits. However, the hybrids involving parents RTN13-A, IR58025-A, VDN-1425, VDN-1608 and VDN-1606 were found to be better for traits like tillers per plant, tillers per square meter, grains per panicle and yield per plant. In majority of the crosses, high SCA was due to high x high or high x low or low x low GCA status of parents. The parents RTN17-A and IR58025-A were identified as the best general combiners. Among hybrids, IR58025-A x VDN-1336, RTN13-A x VDN-1335, RTN17-A x VDN-1335, RTN13-A x VDN-1608 and RTN17 A x VDEN-1525 was most ideal specific combiner for yield contributing characters for exploitation of hybrids. This indicates that, parents like IR58025-A, RTN13-A, VDN-1336, VDN-1335 and VDN-1608 with high yield and yield contributing characters gives to superior crosses mentioned above. The crosses with significant SCA effects in the desirable direction involved parents with high x high or high x low or low x low gca effects indicating high performance of these crosses due to additive, dominance and epistastic gene interaction.
KK Barhate, DN Borole, VV Bhavsar, PR Kore. Line x tester analysis for combining ability studies in rice (Oryza Sativa L.). International Journal of Multidisciplinary Research and Development, Volume 8, Issue 6, 2021, Pages 13-16