Vol. 9, Issue 12 (2020)

Author(s):
JE Jahagirdar, AW More, MP Wankhade and MR Lokhande

Abstract:
A total number of 54 genotypes (5 lines, 8 testers, 40 hybrids and 1 standard check) were evaluated in a randomized block design with two replications during Kharif 2018 to study the general and specific combining ability effects for yield and yield contributing characters at Agriculture Research Station, Badnapur. Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani. Five competitive plants were selected randomly from each row in each replication for recording the observations. High magnitude of variances due to lines and testers against line x tester interaction for the characters indicated the presence of variability. The estimates of components of variance for GCA were higher in magnitude than SCA variances except for pollen fertility and primary branches per plant indicating presence of additive gene action. The estimates of GCA effects revealed that BSMR 736 B, BDN 2004-4 B, BDNHR 1 and BDNHR 35-8 were the good general combiners for grain yield per plant and most of the yield contributing characters. The lines BDN 2004-3 B and tester BDNHR 21-1-1 and BDNHR 36-7 have registered significant negative GCA effect for days to 50 per cent flowering and days to maturity. Among all crosses, BSMR 736 A x BDNHR 22-1-1 manifested maximum positive SCA effect followed by BDN 2004-4 A x BDNHR 35-8 and BDN 2004-2A x BDNHR 24-1-1-1 for grain yield per plant. On the basis of per se performance and general combining ability parents, BSMR 736 B, BDN 2004-4 B, BDNHR 1 and BDNHR 35-8 were identified for their use in potential breeding programmes. Two crosses BSMR 736 A x BDNHR 22-1-1 and BDN 2004-3 A x BDNHR 35-8 showing high per se performance, significant desirable SCA effects for grain yield per pant, days to maturity and pollen fertility.