Effect of partial selfing and polygenic selection on establishment in a new habitat

H. Sachdeva, Evolution 73 (2019) 1729–1745.

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Journal Article | Published | English
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Abstract
This paper analyzes how partial selfing in a large source population influences its ability to colonize a new habitat via the introduction of a few founder individuals. Founders experience inbreeding depression due to partially recessive deleterious alleles as well as maladaptation to the new environment due to selection on a large number of additive loci. I first introduce a simplified version of the Inbreeding History Model (Kelly, 2007) in order to characterize mutation‐selection balance in a large, partially selfing source population under selection involving multiple non‐identical loci. I then use individual‐based simulations to study the eco‐evolutionary dynamics of founders establishing in the new habitat under a model of hard selection. The study explores how selfing rate shapes establishment probabilities of founders via effects on both inbreeding depression and adaptability to the new environment, and also distinguishes the effects of selfing on the initial fitness of founders from its effects on the long‐term adaptive response of the populations they found. A high rate of (but not complete) selfing is found to aid establishment over a wide range of parameters, even in the absence of mate limitation. The sensitivity of the results to assumptions about the nature of polygenic selection are discussed.
Publishing Year
Date Published
2019-09-01
Journal Title
Evolution
Volume
73
Issue
9
Page
1729-1745
ISSN
eISSN
IST-REx-ID

Cite this

Sachdeva H. Effect of partial selfing and polygenic selection on establishment in a new habitat. Evolution. 2019;73(9):1729-1745. doi:10.1111/evo.13812
Sachdeva, H. (2019). Effect of partial selfing and polygenic selection on establishment in a new habitat. Evolution, 73(9), 1729–1745. https://doi.org/10.1111/evo.13812
Sachdeva, Himani. “Effect of Partial Selfing and Polygenic Selection on Establishment in a New Habitat.” Evolution 73, no. 9 (2019): 1729–45. https://doi.org/10.1111/evo.13812.
H. Sachdeva, “Effect of partial selfing and polygenic selection on establishment in a new habitat,” Evolution, vol. 73, no. 9, pp. 1729–1745, 2019.
Sachdeva H. 2019. Effect of partial selfing and polygenic selection on establishment in a new habitat. Evolution. 73(9), 1729–1745.
Sachdeva, Himani. “Effect of Partial Selfing and Polygenic Selection on Establishment in a New Habitat.” Evolution, vol. 73, no. 9, Wiley, 2019, pp. 1729–45, doi:10.1111/evo.13812.
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