Genetic variability studies in sunflower (Helianthus annuus L.)
1999
Teklewold, A. | Jayaramaiah, H. | Ramesh, S. | University of Agricultural Sciences, Bangalore (India). Project Co-ordinating Unit (Sunflower)).
Phenotypic and genotypic coefficients of variation (PCV and GCV), heritability in broad sense (h2) and genetic advance (GA) expressed as per cent of mean were determined for seed and oil yield and 14 other component traits in 144 sunflower genotypes. Analysis of variance revealed significant differences among the genotypes with rerspect to all the characters studied. Difference between PCV and GCV was narrow for all the characters except number of filled seeds, Harvest index, per cent autogamy and leaf area implying that phenotypic variability reliably estimate genotypic variability. Seed and oil yield exhibited high PCV, GCV, h2 and GA. Days to 50 per cent flowering and maturity, Seed setting per cent, grain filling period, per cent autogamy and oil content manifested low to moderate PCV and GCV with moderate to high h2.
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