ارزيابي خصوصيات كمي و كيفي لاين هاي اصلاحي ، ارقام زراعي و بومي گندم نان باروش

An Evaluation of Quantitative and Qualitative Characteristics of Breeding Lines, Cultivars and Landrace Varieties of Bread Wheat Using Multivariate Statistical Analysis

A field experiment in augmented design with three controls was conducted to evaluate the quantitative and qualitative characteristics of 90 breeding lines, and 55 cultivars and landrace varieties of bread wheat (Triticum aestivum L.) using multivariate statistical methods. Twelve agronomic and morphologic characters such as yield and itʹs components, and 8 bread making quality traits including protein percent and SDS-sedimentation value were evaluated. Principal component analysis detected 7 components, which explained 77 percent of the total variation. The second component was related to qualitative characters such as SDS sedimentation value and protein percentage. Grain yield and yield components had a majar contribution to the 61h component. The results of correlation analysis indicated a direct relationship between maturity and bread making quality, as well as a negative relationship between grain yield and protein percent. The first and second canonical variables exhibited a direct and positive effect on protein quantity and quality. The first canonical variable of agronomic traits revealed a negative relationship between yield components. The second variable introduced a few traits related to yield. Stepwise regression analysis indicated grain yield, Zeleny sedimantation volume, water absorption percent and spike grain weight as effective traits to explain 87.26 percent of total protein yield variation. In cluster analysis, qualitative and quantitative traits were classified into 5 groups. Also cluster analysis for genotypes showed the high potential of landrace cultivars from the view point of grain yield components and breadmaking quality.