A note on the estimation of the effective number of additive and dominant loci contributing to quantitative variation. | Zendy

Louis Ollivier | Zendy; Luc Janss | Zendy

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A note on the estimation of the effective number of additive and dominant loci contributing to quantitative variation.

Author(s) -

Louis Ollivier,

Luc Janss

Publication year - 1993

Publication title -

genetics.

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.792

H-Index - 246

ISSN - 3049-7094

DOI - 10.1093/genetics/135.3.907

Subject(s) - outbreeding depression , biology , variation (astronomy) , statistics , estimation , inbred strain , genetics , quantitative genetics , mathematics , genetic variation , population , inbreeding , gene , sociology , physics , demography , management , astrophysics , economics

A method of estimating the number of loci contributing to quantitative variation has been proposed by S. Wright in 1921. The method makes use of the means of inbred lines and the variances of their F1, F2 and backcrosses. The method has been extended to crosses between outbreeding populations by R. Lande in 1981. Additive gene action is one of the major assumptions required for obtaining valid estimates. It is shown here that this assumption may be relaxed. One can estimate both a total number of effective loci and a number of dominant loci (the latter only when the parents are inbred) by comparing the variances of the F1, F2 and backcrosses. Numerical illustrations are given, based on crossbreeding data.

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