Vol. 12, Issue 6 (2023)

Author(s):
JS Dapke, PB Vanave, GB Vaidya, V Bariskar and MR Naik

Abstract:
The sixty one genotypes including 42 hybrids, 17 parents along with GCH 5 and GCH-7 as commercial checks were evaluated for stability in three environments. Three female lines viz; VP-1, SKP-84, JP-65 and fourteen male parents viz; JC-10, RG 1414, DCS 105, SKI 270, 48-1, RG-2275, MCI 8, VI 9, DCS 78, ANDC 8, DCS 107, JC-12, TMV-6, DCS-84 were crossed in Line x Tester design and evaluated along with two hybrid checks. The stability analysis indicated the presence of significant Genotype by Environment interaction for all the characters under study except oil content. Both linear and non-linear components of G x E interaction were significant for number of capsules on primary spike, seed yield per plant and 100-seed weight. Higher magnitude of mean squares due to environment (linear) indicated that differences between environments were considerable for all the characters and revealed that these characters were influenced by environments considerably. Among all the parents, 9 parents showed a high mean when compared with the experimental mean while top five parents viz., SKP-84 ( = 173.66), SKI-270 ( = 168.52), DCS-84 ( = 167.11), 48-1 ( = 166.62) and TMV-6 ( = 163.19) were average responsive (bi ≈ 1) to all the environmental conditions with higher seed yield per plant. Forteen hybrids and check revealed average stable response. Among them top hybrids were SKP-84 x 270 ( =266.87), SKP-84 x TMV-6 ( =256.87), VP-1 x SKI-270 ( =255.44), SKP-84 x 48-1( =251.24), and SKP-84 x DCS 84 ( =248.01). None of the parents or hybrids was found consistently stable for all the characters in any environment.