Genetic Divergence, Character Correlations and Heritability Study in 22 Accessions of Groundnut (Arachis hypogaea L.)

摘要

Twenty two groundnut genotypes collected from International Crops Research Institute for Semi Arid Tropics (ICRISAT) and local sources (Samaru, UNILORIN and UNAAB) were cultivated in Lagos (60o 36’N, 30o 34’E) and Abeokuta (70o 10’N, 30o 20’E) during 2010 planting seasons, to determine the genetic variability and performance of the genotypes. Data collected on ten (10) characters and yield was subjected to multivariate analysis to determine genetic divergence among the genotypes. Number of pods per plant showed significant positive correlation with yield per plant in both environments also had the largest direct positive effect on yield per plant (0.66, 0.70). Days to maturity showed the largest direct negative effect of -0.33 and -0.36 in Lagos 2003 and Abeokuta 2004 respectively. Heritability estimates ranged from 62.34% to 90.67 and 24.75 to 89.46 for number of branches per plant at flowering and days to maturity in (E1) Lagos and (E2) Abeokuta, respectively. The mean squares of the combined analysis of variance revealed significant genotypes and Genotype x Environment interactions on yield per plant.