Glischropus tylopus, the first known old-world bat with an X-autosome translocation

Volleth, Marianne; Yong, Hoi Sen

doi:10.1007/bf01951669

Cited by 4 publications

(5 citation statements)

References 16 publications

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“…2a). Such IHBs are also present in X chromosomes of G. tylophus (Volleth and Yong 1987) and Carollia brevicauda (Parish et al 2002). X-A translocations pose two problems in effective meiotic pairing (Dobigny et al 2004).…”

Section: X-autosome Translocationmentioning

confidence: 96%

“…Studies into the composition of such IHBs in X-A translocated chromosomes (e.g., Parish et al 2002, Dobigny et al 2004) revealed them to be composed largely of 5S and 28S rDNA clusters and highly-amplified telomeric repeats. The heterochromatic block separates the early-replicating autosomal and late-replicating gonosomal segments, preventing the transmission of the X-inactivation signal from the sex genes to those of the translocated autosome (Volleth and Yong 1987, Sharp et al 2002, Dobigny et al 2004). Further, fluorescent in situ hybridization studies using telomeric and ribosomal probes may confirm the presence of telomeric repeats and rDNA sequences within the IHB of the X chromosome in M. aurita.…”

Section: X-autosome Translocationmentioning

confidence: 98%

“…While X-autosome translocations are common in New World phyllostomid genera such as Artibeus, Carollia and Chaeroniscus (Hsu et al 1968;Tucker and Bickham 1989), only two cases have been reported in Old World species belonging to the Vespertilionidae. These include Glischropus tylophus (2n=30/31, Volleth and Yong 1987) from Malaysia and G. beatrix (2n=22/23, Volleth and Heller 2007) from central Africa. Hence, the X-A translocation in Myzopoda represents the third known occurrence in an Old World species.…”

Section: X-autosome Translocationmentioning

confidence: 98%

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Cross-species chromosome painting in bats from Madagascar: the contribution of Myzopodidae to revealing ancestral syntenies in Chiroptera

et al. 2010

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The chiropteran fauna of Madagascar comprises eight of the 19 recognized families of bats, including the endemic Myzopodidae. While recent systematic studies of Malagasy bats have contributed to our understanding of the morphological and genetic diversity of the island's fauna, little is known about their cytosystematics. Here we investigate karyotypic relationships among four species, representing four families of Chiroptera endemic to the Malagasy region using cross-species chromosome painting with painting probes of Myotis myotis: Myzopodidae (Myzopoda aurita, 2n = 26), Molossidae (Mormopterus jugularis, 2n = 48), Miniopteridae (Miniopterus griveaudi, 2n = 46), and Vespertilionidae (Myotis goudoti, 2n = 44). This study represents the first time a member of the family Myzopodidae has been investigated using chromosome painting. Painting probes of M. myotis were used to delimit 29, 24, 23, and 22 homologous chromosomal segments in the genomes of M. aurita, M. jugularis, M. griveaudi, and M. goudoti, respectively. Comparison of GTG-banded homologous chromosomes/chromosomal segments among the four species revealed the genome of M. aurita has been structured through 14 fusions of chromosomes and chromosomal segments of M. myotis chromosomes leading to a karyotype consisting solely of bi-armed chromosomes. In addition, chromosome painting revealed a novel X-autosome translocation in M. aurita. Comparison of our results with published chromosome maps provided further evidence for karyotypic conservatism within the genera Mormopterus, Miniopterus, and Myotis. Mapping of chromosomal rearrangements onto a molecular consensus phylogeny revealed ancestral syntenies shared between Myzopoda and other bat species of the infraorders Pteropodiformes and Vespertilioniformes. Our study provides further evidence for the involvement of Robertsonian (Rb) translocations and fusions/fissions in chromosomal evolution within Chiroptera.

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Section: X-autosome Translocationmentioning

confidence: 96%

Section: X-autosome Translocationmentioning

confidence: 98%

Section: X-autosome Translocationmentioning

confidence: 98%

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Cross-species chromosome painting in bats from Madagascar: the contribution of Myzopodidae to revealing ancestral syntenies in Chiroptera

et al. 2010

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“…Y 2 represents the non-fused autosome present only in males. In Chiroptera, this type of rearrangement was found in the vespertlionid Glischropus tylopus (Volleth and Yong, 1987;Volleth et al, 2001), and also in Phyllostomidae, where it is present in a large number of species of Stenodermatinae (e.g., Pieczar ka et al, 2013) and in the genus Carollia (e.g., Tucker and Bickham, 1986;Pieczarka et al, 2005). If not the X but the Y chromosome is fused with an autosome, the diploid chromosome number in females (2n) is higher than that of males (2n-1).…”

Section: Sex Chromosome Systemmentioning

confidence: 90%