Path Coefficient Analysis for Water Use Efficiency, Evapo-transpiration Efficiency and Some Yield Related Traits in Wheat

Abstract

Correlation and path-coefficient were computed on 10 bread wheat genotypes for plant height, flag leaf area, grains per spike, 100-grain weight, total dry matter of above ground material, total water used, evapo-transpiration efficiency, harvest index, water use efficiency and grain yield per plant. Highly significant differences were observed among the varieties/advanced lines for all the traits except water use efficiency, which was only significant. Grain yield was positively and significantly correlated with total dry matter, evapo-transpiration efficiency, harvest index and water use efficiency but non-significantly with plant height, flag leaf area, grains per spike, 100-grain weight and total water used. Maximum and positive direct effect (1.2956) was produced by water use efficiency and followed by total dry matter (1.286). While minimum negative direct effect was produced by 100-grain weight (-0.7902). Plant height, flag leaf area, 100-grain weight, total water used, evapo-transpiration efficiency and water use efficiency produced maximum positive indirect effects of 0.5313, 0.3390, 0.6495, 0.6985, 0.7382 and 0.4079 on grain yield through total dry matter, respectively. The traits having positive direct effects on grain yield, considered to be a suitable selection criteria for evolving high yielding genotypes. While in case of negative direct effects on grain yield, indirect selection criteria could be practiced through traits with positive indirect effects.

Field screening of diverse wheat germplasm for determining their adaptability to semi-arid climatic conditions

“…Genotypic, phenotypic and grain yield correlations are frequently used to select superior genotypes [36,37]. Genetic variability and interrelationships between agronomic characteristics in wheat genotypes have shown that grain yield is significantly correlated with all characteristics except plant height [38][39][40].…”

Correlation and Regression Analysis for Yield Traits in Wheat (<i>Triticum aestivum</i> L.) Genotypes

“…[7]- [12] reported positive correlation of grain yield with a number of grains per spike, plant height and 1000 grain weight. However [12] [13] conducted such studies and concluded that yield components like tillers per plant, grains per spike and 1000 grain weight are main contributors to grain yield in wheat. Keeping in view the present situation, this research is designed to meet the objectives to estimate the correlation between yield components and seed yield in wheat and to work out regression of grain yield on its components.…”