Evaluation of yield and yield components in some of promising wheat lines

ABSTRACT: In order to assess the genetic diversity and interrelationship of traits in some of promising wheat lines and determine the traits effective on grain yield, fifteen wheat lines together one wheat cultivar were evaluated based on agro-morphological characters. The field experiment were carried out in 2009-2010 on the Research Station located at Shirvan Chardavol, Ilam. Analysis of variance showed significant difference between all traits except grain filling period and number of grains per spike. Among all traits, higher genetic coefficient variation and phenotypic coefficient variation were observed for gain yield, number of spike and 1000-grain weight. Correlation analysis showed the 1000-grain weight, plant height and number of spike had positive and significantly relationship with grain yield. In regression analysis (stepwise method), 1000 grain weight, plant height and number of spike remained in the final model (R2? 0.73). Cluster analysis based on squared Euclidean distance and ward’s method, categorized the lines into three groups. The information on diversity and relationships among the agro-morphological traits will be helpful to breeders in constructing their breeding populations or lines and implementing selection strategies.