VARIABILITY AND CORRELATION STUDIES IN PIGEONPEA (Cajanus cajan (L.) Millsp.)
Loading...
Date
1987
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
AAU, Anand
Abstract
Legumes are rich source of protein and minerals, able enough to meet the protein requirement of developing countries. Pigeonpea' is one of the important pulse crops of India. The present investigation was undertaken to estimiate variability and genetical parameters (heritability in broad sense, genotypic coefficient of variation, phenotypic coefficient of variation and expected genetic advance as per cent of mean), genotypic and phenotypic correlations as well as direct and indirect effects of different characters on seed yield in pigeonpea. The experiment was conducted at the Plant Breeding Farm of B. A. College of Agriculture, Gujarat Agricultural University, Anand Campus, Anand; in 1984—85 and 1985-86. The experimental material comprised of 25 true breeding genotypes. The experiment was conducted in 5 x 5 simple lattice design. A total of ten agromorphological and five quality characters were studied. The analysis of variance showed significant differences for all the traits except cluster number per plant, seed yield per plant; cooking time, water absorption capacity, methonine content and soluble sugar content. Considering variability and heritability, high genetic gain could be achieved for number of pods per plant, podfly infestation (weight basis) and seed yield. Moderate genetic gain could be achieved for days to 50 per cent flowering, plant height, seed number per pod, seed : pericarp ratio and podfly infestation (number basis). While in case of cluster number, test weight, cooking time and water absorption capacity, low level of the expected genetic gain could be achieved. Out of twenty eight genotypic and phenotypic associations between eight agromorphological characters studied on pooled basis, only two characters viz., number of poda per plant and number of seeds per pod had significant genotypic and phenotypic correlations. The former character showed positive, while the later showed negative correlations. Concluding the findings, it is stated that isolation of a high yielding type with podfly resistance is possible to some extent from these genotypes. Incorporation of podfly resistance in G23 (T-15-15) will help in further improvement in its yield. G21 (BDN 3) and G22 (BDN 2) were among the group of genotypes with less podfly infestation as well as higher yield. For improving the seed yield, importance should be given to pod number followed by seed number' per pod among agromorphological traits. The quality characters require- detail, independent, multi-year trials with more genotypes for fruitful conclusion.
Description
Keywords
PLANT BREEDING AND GENETICS, AGRICULTURE, A STUDY