Vol. 12, Issue 9 (2023)

Author(s):
SV Aishwarya, D Shoba, S Merina Prem Kumari, A Kavitha Pushpam and M Arumugam Pillai

Abstract:
Genetic association studies were conducted using 110 rice germplasm in the current research for biometrical traits at AC & RI, Killikulam during the Rabi season in the year 2022-2023. The significant differences were recorded among germplasm for yield contributing traits using Analysis of variances (ANOVA) which reveals that germplasm used in the current study were differed for all traits. By using association studies, the degree and direction of relationship was determined. Among the yield contributing traits, four traits viz., number of tillers per plant (0.178), number of productive tillers per plant (0.587), number of filled grains per panicle (0.425), thousand grains weight (0.174) had significant positive correlation with single plant yield. The number of tillers per individual plant and the count of productive tillers per individual plant showed a positive direct impact on the yield of a single plant. Principal component analysis reveals out of fourteen PCs, six PCs were reliable which were having Eigen values of 2.58, 2.18, 1.73, 1.53, 1.23, 1.18 respectively and they had contributed 18.79%. 15.63%, 12.39%, 10.96%, 8.79%, 4.46% of variance to the total variance. Together they contributed 74.72% of the total variance. Therefore, these traits could be deemed important for future selection procedures in programs aimed at improving crops.