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Low mitochondrial v...
Low mitochondrial variability in birds may indicate Hill-Robertson effects on the W chromosome
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- Berlin, Sofia (författare)
- Uppsala universitet,Evolutionsbiologi
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Tomaras, D. (författare)
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Charlesworth, B. (författare)
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(creator_code:org_t)
- 2007-06-06
- 2007
- Engelska.
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Ingår i: Heredity. - : Springer Science and Business Media LLC. - 0018-067X .- 1365-2540. ; 99:4, s. 389-396
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https://www.nature.c...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Interference among loci subject to selection ( the Hill Robertson effect) may considerably reduce levels of adaptation and variability in genomic regions that lack recombination. Y- or W chromosomes are particularly vulnerable to such effects, since they represent large, non-recombining blocks of genetic material. In birds, the W chromosome and mitochondrial genomes are both maternally transmitted, and hence fail to recombine with each other, whereas in mammals the Y chromosome is paternally transmitted. We show here that mitochondrial DNA sequence diversity is reduced in non-ratite birds compared with mammals. After considering possible confounding factors, such as differences in generation times, mutation rates and demography, we conclude that Hill-Robertson effects associated with the W chromosome provide the most likely explanation for this difference.
Ämnesord
- NATURVETENSKAP -- Biologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences (hsv//eng)
Nyckelord
- W chromosomes
- mitochondria
- Hill-Robertson effects
- birds
- mammals
- Biology
- Biologi
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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