Rapid turnover of the W chromosome in geographical populations of wild silkmoths, Samia cyntia ssp

0391910 - BC 2014 RIV NL eng J - Journal Article
Yoshido, A. - Šíchová, Jindra - Kubíčková, S. - Marec, František - Sahara, K.
Rapid turnover of the W chromosome in geographical populations of wild silkmoths, Samia cyntia ssp.
Chromosome Research. Roč. 21, č. 2 (2013), s. 149-164. ISSN 0967-3849. E-ISSN 1573-6849
R&D Projects: GA AV ČR IAA600960925
Grant - others:Ministerstvo zemědělství(CZ) MZE 0002716202; Grant Agency of the Univeristy of South Bohemia(CZ) GAJU 137/2010/P; Japan Society for the Promotion of Science(JP) 19-1114; Japan Society for the Promotion of Science(JP) 23380030; Japan Society for the Promotion of Science(JP) 21-7147
Institutional support: RVO:60077344
Keywords : fluorescence in situ hybridisation * heterochromatin * insects
Subject RIV: EB - Genetics ; Molecular Biology
Impact factor: 2.688, year: 2013
http://link.springer.com/content/pdf/10.1007%2Fs10577-013-9344-1.pdf

Geographical populations of Samia cynthia ssp. differ in chromosome numbers and show derived sex chromosome systems including Z0/ZZ in S. cynthia ricini (2n=27/28), neo-Wneo-Z/neo-Zneo-Z in S. cynthia walkeri (2n=26/26) and neo-WZ1Z2/Z1Z1Z2Z2 in S. cynthia subsp. indet. (2n=25/26). We examined S. cynthia pryeri with an ancestral-like karyotype of 2n=28/28 and a WZ/ZZ sex chromosome system. The S. cynthia pryeri W chromosome was composed of a highly heterochromatic body and of a euchromatin-like tail. CGH and FISH with W chromosome painting probes revealed that the highly heterochromatic part lacks homology in the genomes of other subspecies, whereas the euchromatin-like part corresponds to a heterochromatic part of the neo-W chromosomes in S. cynthia walkeri and S. cynthia subsp. indet. Our findings suggest that the curious WZ system of S. cynthia pryeri may represent an ancestral state of the Samia species complex but do not exclude an alternative hypothesis of its derived origin.
Permanent Link: http://hdl.handle.net/11104/0222001