GENETIC STUDIES IN M4 POPULATION OF SOYBEAN CULTIVAR TAMS-38.
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Date
2019
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Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra.
Abstract
The present study was conducted with the objective to estimate between and within family variances, estimate genetic parameters and identify superior mutants for further utilization, at experimental farm of Agricultural Botany Section, College of Agriculture, Nagpur during kharif 2018 in M4 generation. In kharif 2017, 104 mutants identified in M3 generation along with two checks (TAMS-38 and JS-335) were evaluated in M4 generation in two replications. Data were recorded on germination percentage, days to first flower, days to maturity, plant height, number of branches plant-1, number of pod plant-1, 100 seed weight and seed yield plant-1 were recorded. Analysis of variance indicated that the mean square due to between family were highly significant for all traits, revealing the presence of significant genetic variability
between the families. Intra class correlation (t) lead the conclusion that differences between individuals within family is large and each family differentiated distinctly from the other were also large for all traits except germination percentage in M4 generation hence, equal weightage to σ2f and σ2w were suggested to be considered for selection in M4 generation.
Genetic parameters estimated revealed that seed yield plant-1, number of pod plant-1, 100 seed weight, plant height and days to maturity where those characters influenced by additive gene action as they exhibited high genotypic coefficient of variation, moderate heritability along with high genetic advance as percentage of mean and hence considered for selection. Due to the predominance of additive gene action for yield and yield component, 144 individual plants from 41 families selected in M4 generation were suggested to be raised in progeny rows for one more generation so as to attain homozygosity.
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BISANE, RITIK DIGAMBER. (2019). Genetic studies in M4 population of soybean cultivar TAMS-38. Department of botany, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola. M. Sc. 2019. Print. xii, 79p. (unpublished).