S. Jha, A. Kumar, S. Mishra Alpha lattice design, heritability, GCV, PCV, genetic advance 14-21 10 (1) January 2026 An experiment was carried out at Birsa Agriculture University during kharif-2024 to estimate the genetic factors like variability, heritability and genetic advance, among fourty finger millet genotypes. The experiment was conducted in an Alpha lattice design with three replications, four blocks per replication, ten plots per block and data were recorded for 15 quantitative traits. Analysis of variance revealed significant genetic variability across all traits, except number of plants per plot. The ANOVA results indicate the presence of substantial genetic variability for most traits, suggesting good potential for selection and crop improvement. However, the non-significant variation observed for number of plants per plot suggests that this trait is largely influenced by environmental factors and may not be effective for genetic selection. The average grain yield and fodder yield was 24.33 q/ha and 59.29q/ha respectively, Genotype showed maximum yield for grain is CFMV-2 (33.60 q/ha) and for fodder PR-1731(74.8q/ha). The mean performance data showed that genotypes outperformed than the best check are CFMV-2, IIMRFMR-3796 for grain yield and PR-1731, KMR-301, BBM-13, A-404 for fodder yield. In case of grain and fodder yield, Genotypic Coefficient of Variation (GCV) was 19.96 and 13.23, while Phenotypic Coefficient of Variation (PCV) was 22.64 and 16.10 respectively. High heritability coupled with high genetic advance as percent of mean identified for days to fifty percent flowering, finger length, flag leaf area, grain yield per panicle, grain yield, fodder yield per hectare and biological yield per plant. High heritability coupled with high genetic advance (as percent of mean) is one of the most reliable indicators of predominant additive gene action in quantitative traits. Selection of the parents should be based on characters such as earliness, finger length, grain yield per panicle, fodder yield per hectare in finger millet lines to identify the potential for higher grain and fodder production.