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CHROMOSOMAL REARRANGEMENTS DO NOT SEEM TO AFFECT THE GENE FLOW IN HYBRID ZONES BETWEEN KARYOTYPIC RACES OF THE COMMON SHREW ( SOREX ARANEUS )
Author(s) -
Horn Agnès,
Basset Patrick,
Yannic Glenn,
Banaszek Agata,
Borodin Pavel M.,
Bulatova Nina S.,
Jadwiszczak Katarzyna,
Jones Ross M.,
Polyakov Andrei V.,
Ratkiewicz Miroslaw,
Searle Jeremy B.,
Shchipanov Nikolai A.,
Zima Jan,
Hausser Jacques
Publication year - 2012
Publication title -
evolution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.84
H-Index - 199
eISSN - 1558-5646
pISSN - 0014-3820
DOI - 10.1111/j.1558-5646.2011.01478.x
Subject(s) - biology , sorex , araneus , gene flow , genetics , hybrid zone , intraspecific competition , karyotype , shrew , gene , microsatellite , chromosome , evolutionary biology , genetic variation , zoology , allele
Chromosomal rearrangements are proposed to promote genetic differentiation between chromosomally differentiated taxa and therefore promote speciation. Due to their remarkable karyotypic polymorphism, the shrews of the Sorex araneus group were used to investigate the impact of chromosomal rearrangements on gene flow. Five intraspecific chromosomal hybrid zones characterized by different levels of karyotypic complexity were studied using 16 microsatellites markers. We observed low levels of genetic differentiation even in the hybrid zones with the highest karyotypic complexity. No evidence of restricted gene flow between differently rearranged chromosomes was observed. Contrary to what was observed at the interspecific level, the effect of chromosomal rearrangements on gene flow was undetectable within the S. araneus species.