Vol. 11, Issue 10 (2022)

Author(s):
Deepak D Sharma, Vipul P Patel, Ankit R Chaudhary and Aneri A Patel

Abstract:
The present investigation was carried out at Regional Rice Research Station, NAU, Vyara. The study involved two female lines with Wild Abortive (WA) and Gambiaca CMS sources crossed with 165 male parents. Total 284 F1s were evaluated in Kharif-2020 to identify the potential restorers and maintainers. Out of those, 61 F1s with identified restorers were further evaluated. The per se performance and heterosis was estimated for the characters viz., days to 50 % flowering, plant height (cm), productive tillers per plant, panicle length (cm), grains per panicle, grain yield per plant (g), straw yield per plant (g) and harvest index (%). The per se performance reported huge variation among the cross combinations. It was observed that the means for yield and yield components were higher for the cross combinations of RTN13A comparative to IR58025A. Therefore, mostly the crosses of RTN13A were found to be superior than the crosses of IR58025A, except for days to 50 % flowering and plant height. The male parent NVSR 2309 gave highest yield 32.14 g and 33.33 g with both the CMS lines IR58025A and RTN13A, respectively. The magnitude of heterosis for yield and its related traits was found to be higher for the crosses of female IR58025A than the crosses of RTN13A. For IR58025A, the pollen parents NVSR 2247 and NVSR 2529 registered highest positive value of mid parent heterosis (34.77 %) and heterobeltiosis (28.35 %), respectively. While, for the female RTN13A, NVSR 2927 registered the highest positive value of 28.61 and 17.89 % for both mid parent heterosis and heterobeltiosis, respectively.