Genetic variability for quantitative traits in China aster
[Callistephus chinensis (L.) Nees]
Gayatri Khangjarakpam1, Rajiv Kumar, G.K. Seetharamu1, T. Manjunatha Rao,
M.V. Dhananjaya, R. Venugopalan2 and K. Padmini3
Division of Ornamental Crops, ICAR-Indian Institute of Horticultural Research
Hessaraghatta Lake Post, Bengaluru - 560 089, India
E-mail : flori_rajiv@yahoo.co.in
ABSTRACT
A field study was conducted to estimate genetic variability, heritability and genetic advance in 20 genotypes of China
aster for 15 traits during the year 2012-13 in Randomized Complete Block Design, with three replications. Results
revealed that the magnitude of phenotypic co-efficient of variation (PCV) was higher than genotypic co-efficient of
variation (GCV) for all the traits studied. 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 expression of these
characters. High (>20%) GCV and PCV were recorded for plant height, number of branches and leaves per plant,
flower diameter, number of ray and disc florets/flower head, stalk length, and, number and weight of flowers/plant.
Heritability estimates ranged from 28.30% (flowering duration) to 99.54% (flower diameter). High heritability
(>60%) was observed for all the traits except flowering duration. High heritability, coupled with high genetic advance
as per cent mean, was recorded for flower diameter, stalk-length, number of branches/plant, weight of flowers/plant,
days to first flower opening, days to 50 per cent flowering, plant height, number of leaves/plant, number of ray and disc
florets/flower head, number of flowers/plant, indicating a possible role of additive gene action. Thus, these traits can
be improved through selection and breeding.
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[Callistephus chinensis (L.) Nees]
Gayatri Khangjarakpam1, Rajiv Kumar, G.K. Seetharamu1, T. Manjunatha Rao,
M.V. Dhananjaya, R. Venugopalan2 and K. Padmini3
Division of Ornamental Crops, ICAR-Indian Institute of Horticultural Research
Hessaraghatta Lake Post, Bengaluru - 560 089, India
E-mail : flori_rajiv@yahoo.co.in
ABSTRACT
A field study was conducted to estimate genetic variability, heritability and genetic advance in 20 genotypes of China
aster for 15 traits during the year 2012-13 in Randomized Complete Block Design, with three replications. Results
revealed that the magnitude of phenotypic co-efficient of variation (PCV) was higher than genotypic co-efficient of
variation (GCV) for all the traits studied. 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 expression of these
characters. High (>20%) GCV and PCV were recorded for plant height, number of branches and leaves per plant,
flower diameter, number of ray and disc florets/flower head, stalk length, and, number and weight of flowers/plant.
Heritability estimates ranged from 28.30% (flowering duration) to 99.54% (flower diameter). High heritability
(>60%) was observed for all the traits except flowering duration. High heritability, coupled with high genetic advance
as per cent mean, was recorded for flower diameter, stalk-length, number of branches/plant, weight of flowers/plant,
days to first flower opening, days to 50 per cent flowering, plant height, number of leaves/plant, number of ray and disc
florets/flower head, number of flowers/plant, indicating a possible role of additive gene action. Thus, these traits can
be improved through selection and breeding.
download
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