Author: Lu, Pengxin

Source: Canadian Journal of Forest Research, Volume 38, Number 11, November 2008 , pp. 2917-2921(5)

Publisher: NRC Research Press

Abstract:

This note verifies the applicability of an approach derived from Adams et al. (W.T. Adams, T.L. White, G.R.Hodge, and G.L. Powell. 1994. Silvae Genet. 43: 357-366) that used the ratio of unbiased to biased heritability estimates (denoted by R_h) to approximate type-B genetic correlation (r_B) estimates. Both theoretical evidence and empirical evidence suggest that the estimate of the ratio of unbiased to biased heritability is often a good approximation of the estimate of type-B genetic correlation under the assumption of homogeneous heritability among sites. Given the large sampling errors and often unstable estimates of r_B, the approach concerned may provide an alternative to existing methods for estimating type-B genetic correlation.

L'objectif de cette étude consistait à vérifier la validité d'une approche découlant d'Adams et al. (W.T. Adams, T.L. White, G.R. Hodge et G.L. Powell. 1994. Silvae Genet. 43 : 357-366) qui a eu recours au rapport des estimations d'héritabilité biaisée et non biaisée (désigné par R_h) pour obtenir une estimation approximative de la corrélation génétique de type B (r_B). Les preuves théoriques et empiriques suggèrent que le rapport des estimations d'héritabilité biaisée et non biaisée représente souvent une bonne approximation de l'estimation de la corrélation génétique de type B en assumant que l'héritabilité est homogène d'un site à l'autre. Étant donné les grandes erreurs d'échantillonnage et les estimations souvent instables de r_B, l'approche étudiée ici peut fournir une alternative aux méthodes existantes pour estimer la corrélation génétique de type B.

Document Type: Research article

Publication date: 2008-11-01

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