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Estimation of heritability by parent-offspring regression

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Summary

The implications of bias due to previous inbreeding of parents and genotype x environmental interaction on narrow sense heritability (h2) estimates by parent-offspring regression are enumerated. To remove the bias caused by genotype x environment interaction, an analysis of covariance model could be used. In special cases, where phenotypic expression is a result of two organisms interacting, such as in symbiotic N2 fixation, an analysis of covariance model with a test of heterogeneity of slopes is recommended. When host genotype x strain interactions are significant, separate heritability estimates for each strain are suggested to take advantage of genotype x strain interaction, which may be a major factor contributing to the expression of N2 fixation traits.

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Communicated by A.L.Kahler

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Fernandez, G.C.J., Miller, J.C. Estimation of heritability by parent-offspring regression. Theoret. Appl. Genetics 70, 650–654 (1985). https://doi.org/10.1007/BF00252291

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