The Ka /Ks and πa /πs Ratios under Different Models of Gametophytic and Sporophytic Selection.

ABSTRACT: Alternation of generations in plant life cycle provides a biological basis for natural selection occurring in either the gametophyte or the sporophyte phase or in both. Divergent biphasic selection could yield distinct evolutionary rates for phase-specific or pleiotropic genes. Here, we analyze models that deal with antagonistic and synergistic selection between alternative generations in terms of the ratio of nonsynonymous to synonymous divergence (Ka/Ks). Effects of biphasic selection are opposite under antagonistic selection but cumulative under synergistic selection for pleiotropic genes. Under the additive and comparable strengths of biphasic allelic selection, the absolute Ka/Ks for the gametophyte gene is equal to in outcrossing but smaller than, in a mixed mating system, that for t

SUBMITTER: Li LL 

PROVIDER: S-EPMC10443736 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature