Genetic Divergence And Correlation studies in Niger (Guizotia Ahyssinica Cass. )
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Date
1999
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Birsa Agricultural University, Ranchi
Abstract
The present investigation was carried out in 72 germplasms of niger maintained in Niger Research Scheme of Department of Plant Breeding and Genetics at Birsa Agricultural University, Kanke to collect information on the extent of variability, degree of association of different yield components, their direct and Indirect effect on seed yield and extent of genetic diversity among the genotypes. The experiment was conducted in Niger Experimental Plot of Ranchi Agricultural College Farm during Kharif 1997.
A broad spectrum of variability was visualized in almost all characters, mainly in plant height, number of primary branches per plant and number of secondary branches branches per plant, number of capitulum per plant, days to 50 per cent flowering and days to maturity.
Genotypic coefficient of variation was appreciable in number of capitulum perplant, plant height, number of primary branches per plant and 1000-seed weight. These characters also expressed moderate heritability estimates. Selection based on these characters would give more progress than based on other characters.
Genetic divergence study revealed clustering of germplasms into 8 clusters irrespective of their origin. Many genotypes based on cluster means and genetic diversity was identified as potential parents. Genotypes, BNS-5, GA-23, Phule-5 and ONS-107 of cluster II and BNS-9, RCR-219 and RCR-234 of cluster VI were suggested as potential parents for crossing programme. Hybridization between genotypes of cluster II and VI was suggested for yield improvement. Days to maturity contributed more than 50 per cent in genetic divergence, but role of plant height and 1000-seed weight also had recommendable role in genetic diversity.