Genetic and Heterosis Analyses using Hayman's Six‐Generation Model for Grain Yield and Yield Components in Maize

• DOI: 10.2135/cropsci2014.08.0542
• Publication Date: 2015-03-13T20:06:16Z
• Authors: H.M. Chen; Y.D. Zhang; F.Y. Jiang; Y.X. Huang; W.H. Yao; X.H. Chen; M.S. Kang; X.M. Fan
• Keywords: Overdominance; Trait; Dominance (genetics); genetic model

ABSTRACT This study aimed to (i) estimate additive ( a ), dominance d aa , ad and dd genetic variances effects; (ii) investigate the differences for five or effects among crosses between maize Zea mays L.) line from Suwan‐1 heterotic group inbred lines other groups; (iii) develop theory explain results Hayman's model low‐, mid‐, high‐parent heterosis. was used evaluate in six‐generation sets cross with groups. The magnitude of variance consistent all grain yield (GY) ear length (EL) but different diameter (ED), row number per (RE), kernel (KR), 100‐kernel weight (KW). were similar EL groups, indicating that could be differentiate Reid non‐Reid We postulated ‘linked coexpressed genes’ (LCG) why might when common is crossed serve as an improved explaining LCG explains what dominance–overdominance theories can models do not. For example, it cannot perform like hybrid F 2 population quantitative trait has normal distribution.