Singular effect of linkage on long-term genetic gain in Fisher's infinitesimal model.

ABSTRACT: During the founding of the field of quantitative genetics, Fisher formulated in 1918 his "infinitesimal model" that provided a novel mathematical framework to describe the Mendelian transmission of quantitative traits. If the infinitely many genes in that model are assumed to segregate independently during reproduction, corresponding to having no linkage, directional selection asymptotically leads to a constant genetic gain at each generation. In reality, genes are subject to strong linkage because they lie on chromosomes and thus segregate in a correlated way. Various approximations have been used in the past to study that more realistic case of the infinitesimal model with the expectation that the asymptotic gain per generation is modestly decreased. To treat this system even in the stro

SUBMITTER: Tourrette E 

PROVIDER: S-EPMC11316219 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature