برآورد پارامترهاي ژنتيكي در ذرت بر اساس تجزيه گرافيكي تلاقي هاي دي آ لل

An Estimate of Genetic Parameters in Maize, Based on Graphic Analysis of Diallel Crosses

Acomplete diallel setof five maize inbred lines along with theirparental fines were investigated to estimate genetic parameters of grain yield and yield components as well as gene distribution between parents, using a randomized complete blockdesign of four replications at Seed andPlant Improvement Ilistitute(Karaj) in 2003. Results indicated (hal, ear diameter, number of kernels per car row and number ofʹkernels per earwerecontrolled byover-dominance. while number of kernel rows per ear and kernel width exhibfted partial dominance. Kernel width was controlled by recessive alleles, while number of kernels perear, number of kernel rows perear, number of kemels per ear row as well as ear diameter were controlled by dominant alleles. Line MOl7 and 973 possessed maximum recessive genes for ear diameter, kernel width and number of kernels perear, while for number of kernels perrow and number of kernel rows, line B73 andMOl7 possessed the maximum recessive genes, respectively. For number of kernels per earrow, number of kernels per earand keruel width, inbred line K74/1 carried the maximum number of the dominant genes.