Theoretical Comparison of the Methods of Heritability Estimation for a Threshold Trait on the Basis of Data from Nested Breeding System

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Four methods of heritability estimation of threshold trait, binomial method, arcsine transformation method, probit transformation method and Dempster and Lerner method were compared for the accuracy of estimation. We generated the threshold trait values using simulation assumed nested breeding system. Then we estimated the heritability from nested ANOVA by using each of four methods. Dempster and Lerner method was found to be the best among the four methods in terms of the accuracy and robustness. Binomial and arcsine transformation methods appeared to show the same output, which significantly resulted in underestimation. It was considered that the underestimation was lead from the dependence of mean and variance in the traits value transformed by the methods.
日本水産増殖学会の論文