نویسندگان
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Genetic and geographical variation in 600 Iranian local bread wheat lines were studied in Agricultural College at Karaj in 1998/99 cropping season. A systematic design and multivariate techniques were used. To study morpho-thecnological traits. Principal component analysis reduced 22 variables down to eight components with 80.5% proportional cumulative variance. Factor analysis using maximum likelihood estimation method with varimax rotation was performed on 21 variables and reduced them down to six common factors with 63.6% proportional cumulative variance which were economic yield production and partitioning (17.4%), dry matter production (15.2%), tillering (10.3%), productivity (8.2%), height-related factors (6.9%) and preheating phase length (5.6%). Common and specific variances of revealed that proportional common variances of grain yield, 100-kernel weight, No. of kernels/ Spike and No. of fertile tillers/ plant were 98%, 93%, 93% and 84%, respectively. According to the results, consideration of the 6-common factor model is very suitable and determinable for yield and yield components. With cluster analysis using UPGMA method and based on 65% within group similarity, locations were classified into six clusters. Cluster analysis using WARD method classified the 600 landraces into six clusters. One-way ANOV A on all traits was performed using clusters membership as subscript to prove 6-cluster model statistically. The results showed that these 6 clusters had significant differences (?= 0.001). Genetic variability did not follow the same pattern as geographical variability.
کلیدواژهها [English]
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