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Genotype ✕ Environment Interaction Bias to Parent‐Offspring Regression Heritability Estimates 1
Author(s) -
Casler M. D.
Publication year - 1982
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1982.0011183x002200030024x
Subject(s) - heritability , offspring , biology , regression , covariance , statistics , gene–environment interaction , regression analysis , analysis of covariance , genotype , genetics , mathematics , pregnancy , gene
Parent‐offspring regression is a commonly‐used technique for estimating narrow sense herltability of quantitative characters in crop species. However, regression of progeny means on parent values evaluated in the same or similar environments may lead to biased heritabillty estimates. This bias arises from genotype ✕ environment interaction and error covarlances between parents and progenies. This paper deals with the theoretical effects of these covariances on parent‐offspring regression heritability estimates and emphasizes some considerations necessary in estimating heritability. Covariance analysis is recommended as a method of obtaining more meaningful narrow sense heritabillty estimates than simple parent‐offspring regression for a set of parents and their offspring evaluated in a set of environments.