Assessment of genetic variability parameters in medium duration Pigeonpea lines (Cajanus cajan (L.) Millsp.)
2016
Hemavathy, A Thanga | Bapu, J.R Kannan | Malarvizhi, D.
The present investigation was conducted during kharif, 2014 at Department of Pulses, Tamil Nadu Agricultural University, Coimbatore. The experimental material comprised of 240 medium duration pigeonpea entries and it was laid out in Randomised Block Design with three replications. The analysis of variance revealed significant differences among the genotypes for all the characters studied, indicating a high degree of variability in the material. The values for phenotypic coefficient of variation obtained for various yield and yield attributing characters ranged from 6.84 to 38.87 per cent. The values of phenotypic coefficients of variability were greater than genotypic coefficients of variability for all the traits studied indicating environmental factors influencing the characters. High PCV and GCV were recorded for number of pods per plant (38.87 and 38.85%) followed by number of primary branches (22.68 and 22.24%) indicated large extent of genetic variability for these traits in the material. High heritability along with high genetic advance as per cent of mean were recorded for number of pods per plant (99.90, 79.99) followed by number of primary branches, grain yield and 100 seed weight, indicating involvement of additive gene action for these traits and phenotypic selection based on these traits in the segregating generations would likely to be more effective. Grain yield has significant positive correlation with number of pods per plant, number of primary branches, plant height and number of seeds per pod. Hence direct selection for these traits would be rewarding for yield improvement.
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