Morphological and Physico-Chemical Diversity in Different Rice Cultivars by Factor and Cluster Analysis

Allahgholipour, Mehrzad; Farshadfar, Ezatollah; Rabiei, Babak

Morphological and Physico-Chemical Diversity in Different Rice Cultivars by Factor and Cluster Analysis

Document Type : Research Paper

Authors

¹ Research Assist. Prof., Rice Research Institute of Iran, Rasht

² Prof., Dept. of Agronomy and Plant Breeding, Faculty of Agriculture, Razi University

³ Prof., Dept. of Agronomy and Plant Breeding, Faculty of Agricultural Sciences, University of Guilan, Iran

Abstract

To study the structure of morphologic and physico-chemical traits and determining of the heterotic pattern of rice varieties, the ninety four selected rice varieties from the existing germplasm of Rice Research Institute of Iran were evaluated during the growing season for two consecutive years of 2011 and 2012 and 24 rice morphologic and physico-chemical characteristics were measured. Factor analysis for morphologic traits showed the first four independent factors explained 75.66 percent of total variance in all genotypes. The first factor with 24.5 percent of variance was included the yield and its components and was named as yield factor. The second, third and fourth factors with 19.025, 17.134 and 14.963 percent of variance were nominated as grain shape, phonology and filled grains factors, respectively. Factor analysis for physico-chemical traits also revealed the three independent factors explaining 36.3, 21.2 and 18.6 percent of variance in all cultivars, respectively, and were nominated as eating, cooking quality and milling rice recovery factors, respectively. All of the studied genotypes were classified in 9 different and heterotic groups using complete linkage method and Euclidean distance with a 92.6 percent of original grouped cases correctly classified. Results of this study can be utilized for selecting the suitable parents from different clusters to establish new varieties in rice breeding programs.

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