Grouping Different Rice Genotypes Using Factor and Cluster Analyses

Enough knowledge of genetic variation and germplasm classification is necessary to select suitable parents for breeding purposes. In this study, the data derived from measurements of important agronomic traits was used to classify several Iranian and foreign rice varieties and their crosses. Here, four local cultivars were crossed with five pure lines with IRRI source in a line × tester approach. In the next year, parents and their progenies arranged in randomized block design with three replications and planted at the research field of rice research institute of Iran. Some agronomical and morphological traits such as yield and its components were recorded. Analysis of variance showed significant differences between genotypes for all traits. The result of factor analysis based on principle component showed that three factors accounted %77.72 of total variance. These three factors were named as morphological characteristics, yield and its components and phenological factor. In yield and its components were some important traits such as grain yield, number of filled seed, number of empty seed and seed weight that correlation among these characteristics with grain yield was significant. Cluster analysis by UPGMA method divided genotypes to nine groups.