Analysis of epistasis: A genetic model for triploid endosperm traits
三倍体胚乳性状遗传模型的上位性分析

A genetic model for triploid endosperm traits was proposed on the basis of diallel cross system to analyze additive by additive epistasis of direct effect (AA) and maternal effect (AmAm) along with direct additive effect, dominance effect, cytoplasm effect, as well as maternal additive and dominance effects. Monte Carlo simulations were conducted to test the estimation of genetic parameters and robust of this genetic model. Unbiased estimation of the variance components for single trait and covariance components between two traits can be obtained by using minimum norm quadratic unbiased estimation (MINQUE) method for both balanced design and unbalanced design without significant difference. A worked example was used to illuminate the application of analyzing additive by additive epistatic variation.