Lambda-lookdown model with selection

Abstract

The goal of this paper is to study the lookdown model with selection in the case of a population containing two types of individuals, with a reproduction model which is dual to the $\Lambda$-coalescent. In particular we formulate the infinite population "$\Lambda$-lookdown model with selection". When the measure $\Lambda$ gives no mass to 0, we show that the proportion of one of the two types converges, as the population size $N$ tends to infinity, towards the solution of a stochastic differential equation driven by a Poisson point process. We show that one of the two types fixates in finite time if and only if the $\Lambda$-coalescent comes down from infinity. We give precise asymptotic results in the case of the Bolthausen-Sznitman coalescent. We also consider the general case of a combination of the Kingman and the $\Lambda$-lookdown model.

References in corpus (2)

• The fixation line in the $\Lambda$-coalescent
• The Lambda-Fleming-Viot process and a connection with Wright-Fisher diffusion

Cited by in corpus (4)

• The common ancestor type distribution of a $\Lambda$-Wright-Fisher process with selection and mutation
• General selection models: Bernstein duality and minimal ancestral structures
• Rescaling limits of the spatial Lambda-Fleming-Viot process with selection
• Dynamic sampling bias and overdispersion induced by skewed offspring distributions