تجزيه به عامل ها و عليت در ژنوتيپ هاي مختلف برنج

Factor and Path Analysis in Different Rice Genotypes

To determine relationship between differnet traits with grain yield, 100 lines and cultivars were studied in a simple latice design. Twenty traits such as grain yield, yield components and some grain and plant morphologic characters were evaluated. Results showed that grain yield had positive and significant simple correlation with days to 50% flowering, number of panicle per plants, flag leaf width, total number of grain per plant, number of tillers per plant, and 100 grain weight. Factor analysis showed that 87 percent of total variations were determined by six independent factors. So that, they were nominated in four factors under the titles of morphology, grain size and shape, yield and yield components and grain filling. In yield and yield components, traits such as number of panicle perplants, plant weight, number of grain per panicle showed high correlation with each other. Using path analysis, it was demonstrated that the increase in grain yield is largely due to increase in plant weight.