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The fate of W chromosomes in hybrids between wild silkmoths, Samia cynthia ssp.: no role in sex determination and reproduction
A. Yoshido, F. Marec, K. Sahara,
Jazyk angličtina Země Anglie, Velká Británie
Typ dokumentu časopisecké články, práce podpořená grantem
NLK
Free Medical Journals
od 2011
PubMed Central
od 2011 do Před 1 rokem
Europe PubMed Central
od 2011 do Před 1 rokem
ProQuest Central
od 2000-01-01 do Před 1 rokem
Open Access Digital Library
od 1947-01-01
Health & Medicine (ProQuest)
od 2000-01-01 do Před 1 rokem
Public Health Database (ProQuest)
od 2000-01-01 do 2017-12-31
PubMed
26758188
DOI
10.1038/hdy.2015.110
Knihovny.cz E-zdroje
- MeSH
- genetické markery MeSH
- hybridizace genetická * MeSH
- hybridizace in situ fluorescenční MeSH
- křížení genetické MeSH
- můry genetika MeSH
- pohlavní chromozomy * MeSH
- procesy určující pohlaví * MeSH
- rozmnožování genetika MeSH
- zvířata MeSH
- Check Tag
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
Moths and butterflies (Lepidoptera) have sex chromosome systems with female heterogamety (WZ/ZZ or derived variants). The maternally inherited W chromosome is known to determine female sex in the silkworm, Bombyx mori. However, little is known about the role of W chromosome in other lepidopteran species. Here we describe two forms of the W chromosome, W and neo-W, that are transmitted to both sexes in offspring of hybrids from reciprocal crosses between subspecies of wild silkmoths, Samia cynthia. We performed crosses between S. c. pryeri (2n=28, WZ/ZZ) and S. c. walkeri (2n=26, neo-Wneo-Z/neo-Zneo-Z) and examined fitness and sex chromosome constitution in their hybrids. The F1 hybrids of both reciprocal crosses had reduced fertility. Fluorescence in situ hybridization revealed not only the expected sex chromosome constitutions in the backcross and F2 hybrids of both sexes but also females without the W (or neo-W) chromosome and males carrying the W (or neo-W) chromosome. Furthermore, crosses between the F2 hybrids revealed no association between the presence or absence of W (or neo-W) chromosome and variations in the hatchability of their eggs. Our results clearly suggest that the W (or neo-W) chromosome of S. cynthia ssp. plays no role in sex determination and reproduction, and thus does not contribute to the formation of reproductive barriers between different subspecies.
Citace poskytuje Crossref.org
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