Vol. 6, Issue 3 (2018)
Path coefficient and correlation studies of yield and yield associated traits in diverse genotypes of bread wheat (Triticum aestivum L.)
Author(s): Pooja, Veena Chawla, Vikram Singh and Satender Yadav
Abstract: A study was conducted to examine relationship between important traits of bread wheat and their direct and indirect effects on grain yield. Forty diverse genotypes of bread wheat were studied for correlation and path coefficient analysis of some morpho-physiological traits in wheat at HAU Agricultural Research Farm during Rabi 2013-14. All the characteristics studied differed significantly from one another. Generally, the estimates of genotypic correlation coefficients were higher than the corresponding phenotypic correlation coefficients for all the character combinations. The correlation coefficients were estimated among all the traits studied at both genotypic and phenotypic levels. At phenotypic level, the results indicated that tillers per plant, biological yield and harvest index were positively associated with grain yield per plant. At genotypic level, tillers per plant, 1000-grain weight, harvest index and biological yield were found to be positively correlated while plant height and days to maturity were negatively correlated with grain yield per plant. Biological yield, harvest index, days to heading, number of tillers per plant and ear length had significant positive direct effects on grain yield. Harvest index exhibited high direct effect on grain yield and medium indirect effect via plant height, days to maturity and 1000-grain weight. No. of spikelets per ear had poor direct effect on grain yield but moderate indirect effect via ear length and days to 50 per cent heading. It can be concluded that more emphasis should be given on heading days and tillers per plant along with biological yield per plant and harvest index during selection for bread wheat improvement.