Combining ability for yield attributing traits in wheat (Triticum aestivum L.)

Abstract

A study on genetic correlation and inter-relationship of seed yield and associated characters under irrigated conditions was carried out by using forty eight diverse sunflower genotypes. The correlation studies indicated that genotypic correlation coefficients were higher than phenotypic correlation coefficients for most of the traits. The trait seed yield per plant exhibited highly significant and positive correlation with days to 50 percent flowering, days to maturity, number of leaves per plant, stem girth, head diameter, 100 seed weight, seeds per head, filled seeds per head and harvest index at genotypic and phenotypic levels. On the contrary, it expressed negative and highly significant genotypic and phenotypic association with oil content with seed yield per plant. Path coefficient analysis revealed that head diameter, plant height, days to 50 percent flowering and seeds per head exhibited high and positive direct effects on seed yield per plant, whereas, days to maturity and oil content showed moderate to low positive direct effects.