Genetic Analysis of Yield Traits with Elite Maize Hybrid—Yuyu 22

Abstract In order to analysis genetic characteristics of yield, a population with 266 F2∶3 families from an elite hybrid, Yuyu 22, was constructed and a two2location field experiment was conducted in 20011 The results showed that among eight yield traits, row number, ear length, rate of kernel production and ear diameter had higher H21 Kernel weight per ear, kernels per row, ear length performed significant heterosis in F1 generation, but the heterosis of rate of kernel production and weight of 1002kernel were very weak in F2∶3 families1 Their heterosis was not significantly correlated with their heredity, but significantly correlated with CV1 Single2plant yield was significantly correlated with ear diameter, kernels per row, weight of 1002kernel, rate of kernel production and ear length1 As three yield components, row numbers, kernels per row and weight of 1002kernel were significantly and negatively correlated with each other1 There also was a significantly negative correlation between ear length and ear diameter1 Principle component analysis indicated that ear traits influencing single2 plant yield orderly were kernels per row, ear diameter, row number, ear length and weight of 1002kernel1 A key factor to obtain high yield for Yuyu 22 was the increase of kernels per row and ear diameter1