Out-reach Centre of National Research Centre for Groundnut, 38-Dharamvihar, Bhubaneswar-751030 (Orissa).
Six hundred and eighty groundnut germplasm accessions comprising four different habit groups were evaluated for nodule number per plant during rainy season. Rich variation was observed within the population as well as in each habit groups and would be an important gene pool for the breeder. While, the population was evaluated in two distinct environments, it showed two different types of distribution for nodule number per plant. Population registered higher mean nodule number per plant in post-rainy season under rice fallow in comparison to rainy season under red laterite soil. It seems that peddled soil of rice field would not be any constraint for nodulation in rice based groundnut crop and high nodule number per plant in post-rainy season in comparison to rainy season. This might be one reason for better productivity of rabi/summer groundnut under paddy fallow. Twenty tive accessions out of 276 Spanish Bunch accessions showed promise as high nodulating genotypes in comparison to check variety, JL-24.
Augmented Design, Genetic Resources, Groundnut, Nodulation
