PATH COEFFICIENT AND CORRELATION STUDIES OF YIELD AND YIELD ASSOCIATED TRAITS IN CANDIDATE BREAD WHEAT (TRITICUM AESTIVUM L.) LINES
Keywords:
correlation, morphological traits, path coefficient, yield components, wheat genotypesAbstract
Yield and yield contributing traits were studied in candidate bread wheat lines in order to find out the genetic contribution of different characters towards grain yield at NIFA, Peshawar, Pakistan during 2001-02. All the characteristics studied differed significantly from one another. Days to heading showed negative and significant correlation with harvest index and grain yield was not found with the biological yield. Days to maturity were negatively correlated at both genotypic and phenotypic levels with biological yield, harvest index and grain yield and the level of negative genotypic correlation was significant with harvest index and grain yield. Plant height showed negative genotypic and phenotypic correlation with harvest index and grain yield. Biological yield had positive significant genotypic and phenotypic correlation with harvest index and grain yield. Harvest index had positive and highly significant genotypic and phenotypic correlation with grain yield. Positive direct effect of days to heading, days to maturity and biological yield with grain yield were observed. Harvest index showed positive and highest direct effect on grain yield. Genotypic and phenotypic correlation coefficients revealed that important characters influencing grain yield (kg/ha) are harvest index and biological yield. Path analysis showed the importance in order of harvest index, biological yield, plant height, days to maturity and days to heading in grain yield.
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