Genetic and morphological variability for quantitative characters in sunflower
1987
Chaudhary, S.K. | Anand, I.J. (Indian Agricultural Research Inst., New Delhi (India). Div. of Genetics)
A study of thirty exotic collections of sunflower (Helianthus annuus L.) over three seasons, Kharif, rabi and spring for 14 different quantitative characters revealed considerable amount of variability for all the characters except for seedling dry matter weight in Kharif. Variations at genotypic level were also quite high for most of the traits indicating sufficient scope for selection. The spring grown crop was observed to have the highest variability for most of the characters including head diameter and seed yield. The heritability was high for days to heading, days to flowering, number of leaves, plant height at flowering and maturity, oil content and protein content in all the seasons, while for other characters, heritability varied with the season. The genetic advance was consistently high for seed yield in all the three seasons. In general, the characters with higher genetic advance exhibited higher genetic variability suggesting the possibility of crop improvement through effective selection pressure
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