A test for meiotic drive in hybrids between Australian and Timor zebra finches. Issue 23 (3rd November 2020)
- Record Type:
- Journal Article
- Title:
- A test for meiotic drive in hybrids between Australian and Timor zebra finches. Issue 23 (3rd November 2020)
- Main Title:
- A test for meiotic drive in hybrids between Australian and Timor zebra finches
- Authors:
- Knief, Ulrich
Forstmeier, Wolfgang
Pei, Yifan
Wolf, Jochen
Kempenaers, Bart - Abstract:
- Abstract: Meiotic drivers have been proposed as a potent evolutionary force underlying genetic and phenotypic variation, genome structure, and also speciation. Due to their strong selective advantage, they are expected to rapidly spread through a population despite potentially detrimental effects on organismal fitness. Once fixed, autosomal drivers are cryptic within populations and only become visible in between‐population crosses lacking the driver or corresponding suppressor. However, the assumed ubiquity of meiotic drivers has rarely been assessed in crosses between populations or species. Here we test for meiotic drive in hybrid embryos and offspring of Timor and Australian zebra finches—subspecies that have evolved in isolation for about two million years—using 38, 541 informative transmissions of 56 markers linked to either centromeres or distal chromosome ends. We did not find evidence for meiotic driver loci on specific chromosomes. However, we observed a weak overall transmission bias toward Timor alleles at centromeres in females (transmission probability of Australian alleles of 47%, nominal p = 6 × 10 –5 ). While this is in line with the centromere drive theory, it goes against the expectation that the subspecies with the larger effective population size (i.e., the Australian zebra finch) should have evolved the more potent meiotic drivers. We thus caution against interpreting our finding as definite evidence for centromeric drive. Yet, weak centromeric meioticAbstract: Meiotic drivers have been proposed as a potent evolutionary force underlying genetic and phenotypic variation, genome structure, and also speciation. Due to their strong selective advantage, they are expected to rapidly spread through a population despite potentially detrimental effects on organismal fitness. Once fixed, autosomal drivers are cryptic within populations and only become visible in between‐population crosses lacking the driver or corresponding suppressor. However, the assumed ubiquity of meiotic drivers has rarely been assessed in crosses between populations or species. Here we test for meiotic drive in hybrid embryos and offspring of Timor and Australian zebra finches—subspecies that have evolved in isolation for about two million years—using 38, 541 informative transmissions of 56 markers linked to either centromeres or distal chromosome ends. We did not find evidence for meiotic driver loci on specific chromosomes. However, we observed a weak overall transmission bias toward Timor alleles at centromeres in females (transmission probability of Australian alleles of 47%, nominal p = 6 × 10 –5 ). While this is in line with the centromere drive theory, it goes against the expectation that the subspecies with the larger effective population size (i.e., the Australian zebra finch) should have evolved the more potent meiotic drivers. We thus caution against interpreting our finding as definite evidence for centromeric drive. Yet, weak centromeric meiotic drivers may be more common than generally anticipated and we encourage further studies that are designed to detect also small effect meiotic drivers. Abstract : We test for meiotic drive in hybrid embryos and offspring of Timor and Australian zebra finches. We did not find evidence for meiotic driver loci on specific chromosomes but observed an overall transmission bias towards Timor alleles at centromeres in females. … (more)
- Is Part Of:
- Ecology and evolution. Volume 10:Issue 23(2020)
- Journal:
- Ecology and evolution
- Issue:
- Volume 10:Issue 23(2020)
- Issue Display:
- Volume 10, Issue 23 (2020)
- Year:
- 2020
- Volume:
- 10
- Issue:
- 23
- Issue Sort Value:
- 2020-0010-0023-0000
- Page Start:
- 13464
- Page End:
- 13475
- Publication Date:
- 2020-11-03
- Subjects:
- centromere drive -- cryptic drive -- meiotic drive -- telomere drive -- transmission distortion
Ecology -- Periodicals
Evolution -- Periodicals
577.05 - Journal URLs:
- http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)2045-7758 ↗
http://onlinelibrary.wiley.com/ ↗ - DOI:
- 10.1002/ece3.6951 ↗
- Languages:
- English
- ISSNs:
- 2045-7758
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 15055.xml