Assessment of Physiological Maturity through Pod and Seed Developmental Pattern in Local Land Races of Green Gram (Vigna radiata L. Wilczek)

Abstract

For assessing physiological maturity through pod and seed developmental patterns in local landraces of green gram (Vigna radiata L. Wilczek), a sufficient number of flowers were tagged on the day of anthesis for all the genotypes. Ten fruits were harvested per replication for each genotype of five harvesting stages starting from 7 days after anthesis and at seven-day intervals. The harvested pods and seeds were utilized for the study. Enhancement in pod length, weight, no of seed/pod and 1000 seed weight was noted up to 28 DAA in most of the genotypes. Continuous increase in seed fresh weight was noted up to 28 DAA whereas dry weight continued to increase till 35 DAA in correspondence with loss in moisture. Maximum dry matter accumulation was between 14 DAA-21 DAA. Significant moisture loss was recorded for all genotypes from 21 DAA-35 DAA. The highest germination was achieved at 35 DAA for all genotypes except V1 and V4 for which the highest germination was recorded at 28 DAA. Enhancement in shoot length was up to 35 DAA for all genotypes whereas for root length it was till 28 DAA for most of the genotypes. Vigour Index 1 was noted to be constantly enhanced with progress in development up to 35 DAA for most of the genotypes whereas an increase in vigour index II was 28 DAA except V5. Germination and vigor index decreased after 28 DAA in 2 genotypes and 35 DAA for 3 genotypes indicating attainment of physiological maturity between 28-35 DAA.