Haploid selection in "diploid" organisms

Immler, Simone (2019) Haploid selection in "diploid" organisms. Annual Review of Ecology, Evolution, and Systematics, 50. pp. 219-236. ISSN 1543-592X

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Evolutionary rates and strength of selection differ markedly between haploid and diploid genomes. Any genes expressed in a haploid state will be directly exposed to selection, whereas alleles in a diploid state may be partially or fully masked by a homologous allele. This difference may shape key evolutionary processes, including rates of adaptation and inbreeding depression, but also the evolution of sex chromosomes, heterochiasmy, and stable sex ratio biases. All diploid organisms carry haploid genomes, most notably the haploid genomes in gametes produced by every sexually reproducing eukaryote. Furthermore, haploid expression occurs in genes with monoallelic expression, in sex chromosomes, and in organelles, such as mitochondria and plastids. A comparison of evolutionary rates among these haploid genomes reveals striking parallels. Evidence suggests that haploid selection has the potential to shape evolution in predominantly diploid organisms, and taking advantage of the rapidly developing technologies, we are now in the position to quantify the importance of such selection on haploid genomes.

Item Type: Article
Uncontrolled Keywords: biphasic life cycle,gametic selection,imprinting,mitochondrial genome,ploidy,sex chromosomes,ecology, evolution, behavior and systematics,ecology ,/dk/atira/pure/subjectarea/asjc/1100/1105
Faculty \ School: Faculty of Science > School of Biological Sciences
UEA Research Groups: Faculty of Science > Research Groups > Organisms and the Environment
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Depositing User: LivePure Connector
Date Deposited: 11 Dec 2019 02:32
Last Modified: 14 May 2023 00:12
URI: https://ueaeprints.uea.ac.uk/id/eprint/73331
DOI: 10.1146/annurev-ecolsys-110218-024709

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