Recombination

Korol, Abraham B.; Rybnikov, Sviatoslav

doi:10.1016/b978-0-12-822562-2.00078-5

Cited by 1 publication

(2 citation statements)

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“…More generally, a better understanding of the evolution of recombination plasticity will contribute to answering the broader longstanding question of why recombination and sex exist at all and why they are so diverse across the extant phylogenetic groups. 6,88 The randomness of genetic variation -a keystone of the neo-Darwinian synthesis -does not imply that de novo variation is equally likely to increase or decrease fitness: in contrast, it implies much higher chances for novelties to be detrimental, given the long previous selection. 79 Even though recombination is a relatively "soft" source of genetic variation (e.g., compared with mutations 131,132 ), its evolutionary risks are still rather high.…”

Section: Discussionmentioning

confidence: 99%

“…Crossover interference, which quantifies the interaction (suppression/stimulation) between recombination events in neighboring genome regions, is another feature of the recombination system with potentially far-reaching evolutionary effects (reviewed in refs. 88,112,113). For example, the relaxation of positive interference was reported for young, rapidly evolving phyletic lineages (e.g., tigers), 114 probably reflecting a high contribution of directional selection in such groups (compared to more ancient groups where stabilizing selection may prevail).…”

Section: To What Extent Is the Evolution Of Recombination Plasticity ...mentioning

confidence: 98%

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Modeling the evolution of recombination plasticity: A prospective review

et al. 2023

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Meiotic recombination is one of the main sources of genetic variation, a fundamental factor in the evolutionary adaptation of sexual eukaryotes. Yet, the role of variation in recombination rate and other recombination features remains underexplored. In this review, we focus on the sensitivity of recombination rates to different extrinsic and intrinsic factors. We briefly present the empirical evidence for recombination plasticity in response to environmental perturbations and/or poor genetic background and discuss theoretical models developed to explain how such plasticity could have evolved and how it can affect important population characteristics. We highlight a gap between the evidence, which comes mostly from experiments with diploids, and theory, which typically assumes haploid selection. Finally, we formulate open questions whose solving would help to outline conditions favoring recombination plasticity. This will contribute to answering the long‐standing question of why sexual recombination exists despite its costs, since plastic recombination may be evolutionary advantageous even in selection regimes rejecting any non‐zero constant recombination.

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