Genetic parameters of some morphological and physiological traits in durum wheat genotypes (Triticum durum L.)

Abstract

In order to estimate the genetic parameters of some morphological and physiological traits indurum wheat, a simple lattice experimental was carried out by using 58 advanced lines and 6 landraces for two years during 2006 to 2008 at the Agriculture Research Station of Islamic Azad University, Tabriz Branch, Iran. In this investigation traits like plant height, stomatal resistance, stoma-density and stoma-dimension in under and over surface of flag leaf; flag leaf area, number of fertile tiller, number of grains/spike, 1000-grain weight, grain yield, biomass, and harvest index were measured. Combined analysis of data for two years showed that there were significant differences, for the traits among the genotypes under study at 1% probability level. Phenotypiccorrelation coefficients between traits revealed a significant and positive relationship of grain yield with traits such as number of fertile tiller, grains/spike, biomass and harvest index. Estimates of GCV (genetics coefficient variance) showed that, stoma-density and stoma-dimension in under and over surface of flag leaf; grains/spike and grain yields were high, as compares other traits. Also estimates of broad sense heritability showed that, traits such as plant height, stomatal resistance, stoma-density and stoma-dimension in under and over surface of flag leaf; and grains/spike were high, as compares other traits; but for traits like grain yields, biomass, harvest index and number of fertile tiller was moderate. Key words: Durum wheat, genetic variance, genetic coefficient variance, broad sense heritability.