بررسي تنوع ژنتيكي ارقام و لاين هاي برنج (Oryza sativa L) با استفاده از صفات كمي

Assessment of genetic diversity of rice varieties and lines (Oryza sativa L.) using quantative characters

In order to determine the genetic diversity of rice germplasms, 56 genotypes were planted in the experimental field of center of rice institute in Amol, Iran. In this experiment, 15 characters were evaluated. Statistical measurements including: variance analysis of each character, variety classification through cluster analysis and standard deviation were earned out. Binary correlation coefficients of characters and yield estimation for all characters were also carried out through step by step regression. Among evaluated characters, yield per surface unit (m2) had significant correlation with characters such as weight of one hundred seeds, length of seeds and property of length to width of seeds. Correlation of seed width with yield was also significant but negative. Regression equivalent of yield estimating regarding to role of other characters distinguished the value and importance of weight of one hundred seeds as appropriate norm for selection high yield varieties and lines. Variance analysis for characters showed that the difference between genotypes is significant. Cluster analysis using Ward method classified varieties into four groups and showed that there was desirable diversity among varieties.