Abstract

Twelve blackgram genotypes with an arbitrary grouping as 'high' 'medium' and 'low' yielders were studied in terms of assimilate partition. The phenotypic variability was wide. Growth in blackgram is significant between 'peak flowering' and 'harvest' phases. Yielding ability is conditioned by the twin criteria of growth attained on the 45th day and number of folds this value is increased by harvest. Accordingly, CO2 rates itself 'high' among high yielders, No.55 among 'medium' yielders and CM and T9 among 'low' yielders. Growth with the parameter of plant dry weight was phenomenal between 45 days and harvest. This velocity of growth and growth already obtained were yield determinants. This is amply demonstrated by the influence on the typical sigmoid growth curve.

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