Research Article 
Correlation among S1 and S2 Progenies of Sunflower for Seed Yield, its Components and
Resistance to Charcoal Rot (Macrophomina phaseolina) Disease
Talat Mahmood and Syed Sadaqat Mehdi
Asian Journal of Plant Sciences, 2003, 2(11), 844-849.
Abstract
Genotypic and phenotypic correlation coefficients in 150 each S1 and S2 progenies of sunflower derived from random mated sunflower UAF population were studied. The estimates of genetic correlation coefficients were found greater in value than the phenotypic correlation coefficients for all the indicated traits for both S1 and S2 progenies of sunflower. Among S1 progenies of sunflower, seed yield was found positively and significantly correlated with all the traits studied at both phenotypic and genetic levels except with oil content which was positive but non-significant, at genetic level. Oil yield also showed positive and significant correlation with all the traits both at phenotypic and genetic levels but oil content showed positive and significant correlation with days to flowering, days to maturity, internodal length and 100-achene weight at phenotypic level and with days to flowering, days to maturity and 100-achene weight at genetic level. Among S2 progenies of sunflower seed yield also showed almost similar results as of S1 progenies. Among S1 progenies, internal disease score was found positively but non significantly correlated with all the indicated traits at both phenotypic and genetic levels except head diameter which was found negatively correlated at phenotypic and genetic levels. Among S2 progenies, internal disease score showed positive and significant correlation with most of the traits showing that S2 progenies have more resistance to charcoal rot than S, progenies.
ASCI-ID: 7-490
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