Genetic Variability for Agronomy Traits in Bread Wheat Genotype Collection of Iran

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Abstract

One hundred and twelve local bread wheat genotypes available in the wheat collection of Cereal Research Department, Seed and Plant Improvement Institute (SPII) were evaluated in a non-replicated experiment in research farm of SPII, Karaj, Iran in 2009-2010 cropping season. The genotypes were compared with two bread wheat check cultivars Pishgam and Pishtaz. Each genotype was planted in two rows of one meter long. The checks were repeated between the rows of every 20 genotypes. Descriptive analysis of data showed presence of a vast genetic variability among the genotypes for the quantitative and qualitative traits. Stepwise regression analysis showed that seed number per spike and biological yield had positive and significant effects on yield and remained in the final model with adj.R2~70%. Cluster analysis using UPGMA method grouped the bread wheat genotypes in eight groups. Based on field evaluations and data analysis, 22 genotypes were selected for further evaluation in succeeding years.  

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