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Asian Journal of Plant Sciences

Year: 2003 | Volume: 2 | Issue: 11 | Page No.: 834-840
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Authors

Talat Mahmood

Syed Sadaqat Mehdi

Keywords

Research Article

Evaluation of S1 and S2 Progenies of Sunflower (Helianthus annuus L.) For Seed Yield, its Components and Resistance to Charcoal Rot (Macrophomina phaseolina)

Talat Mahmood and Syed Sadaqat Mehdi
Mean squares from analysis of variance revealed significant differences among S1 and S2 progenies evaluated for seed yield, its components and resistance to charcoal rot disease. Mean, range and coefficient of variation indicated that S1 and S2 progenies of "UAF" random mated sunflower population contained larger amounts of variability for all traits. The estimates of genotypic variance were smaller than their corresponding phenotypic variances, revealing presence of environmental components. The genotypic variances among S1 and S2 progenies were significant for all the traits evaluated by testing with their respective standard error. The estimates of environmental variances for indicated traits among S1 and S2 progenies remained low in value compared to their respective genotypic and phenotypic variances. The estimates of broad-sense heritability for all the traits evaluated were comparatively greater among S2 progenies. However, the heritability of all plant traits when tested with their respective standard error when found to be significant for both S1 and S2 progenies.
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