Genetic variability and heritability for quantitative traits in China aster [Callistephus chinensis (L.) Nees.]
Abstract
A field experiment was carried out to estimate genetic variability, heritability and genetic advance for 19 traits among 30 genotypes of China aster. The randomized complete block design with two replications was employed at the College of Horticulture, Mudigere, during the year 2017-18. Analysis of variance revealed that significant differences were observed for all the traits. The phenotypic co-efficient of variation (PCV) was a higher magnitude than the genotypic co-efficient of variation (GCV) for all the traits. Narrow differences between GCV and PCV were recorded in all the characters except flowering duration, vase-life and shelf-life, indicating little environmental influence on the expression of these characters. High heritability coupled with high genetic advance as per cent mean was recorded for the number of florets per flower head, the weight of flower per plant, plant height, flower head diameter, individual flower weight, disc diameter, the number of flowers per plant, days to 50 per cent flowering, the number of primary branches per plant, the number of flowers per branches, plant spread (North-South), 1000 seed weight, plant spread (East-West), flower stalk length, seed yield per plant, vase life and shelf life proves more useful for efficient improvement of a character through simple selection.
Key words: China aster, PCV, GCV, heritability, genetic advance
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