The fate of W chromosomes in hybrids between wild silkmoths, Samia cynthia ssp.: no role in sex determination and reproduction

0458935 - BC 2017 RIV GB eng J - Journal Article
Yoshido, Atsuo - Marec, František - Sahara, K.
The fate of W chromosomes in hybrids between wild silkmoths, Samia cynthia ssp.: no role in sex determination and reproduction.
Heredity. Roč. 116, č. 5 (2016), s. 424-433. ISSN 0018-067X. E-ISSN 1365-2540
R&D Projects: GA ČR(CZ) GA14-22765S
EU Projects: European Commission(XE) 316304 - MODBIOLIN
Institutional support: RVO:60077344
Keywords : hybrids * sex chromosomes * sex determination
Subject RIV: EB - Genetics ; Molecular Biology
Impact factor: 3.961, year: 2016
https://www.nature.com/articles/hdy2015110.pdf

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. We performed crosses between subspecies of wild silkmoths Samia cynthia 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. FISH 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. 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.


Permanent Link: http://hdl.handle.net/11104/0259148