Karyotypic relationships in Asiatic asses (kulan and kiang) as defined using horse chromosome arm-specific and region-specific probes
Jazyk angličtina Země Nizozemsko Médium print
Typ dokumentu srovnávací studie, časopisecké články, práce podpořená grantem
- MeSH
- DNA sondy chemie MeSH
- druhová specificita MeSH
- Equidae genetika MeSH
- hybridizace in situ fluorescenční MeSH
- karyotypizace MeSH
- koně genetika MeSH
- malování chromozomů MeSH
- mapování chromozomů MeSH
- metafáze MeSH
- pruhování chromozomů MeSH
- savčí chromozomy genetika ultrastruktura MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- srovnávací studie MeSH
- Názvy látek
- DNA sondy MeSH
Cross-species chromosome painting has been applied to most of the species making up the numerically small family Equidae. However, comparative mapping data were still lacking in Asiatic asses kulan (Equus hemionus kulan) and kiang (E. kiang). The set of horse arm-specific probes generated by laser microdissection was hybridized onto kulan (E. hemionus kulan) and kiang (E. kiang) chromosomes in order to establish a genome-wide chromosomal correspondence between these Asiatic asses and the horse. Moreover, region-specific probes were generated to determine fusion configuration and orientation of conserved syntenic blocks. The kulan karyotype (2n = 54) was ascertained to be almost identical to the previously investigated karyotype of onager E. h. onager (2n = 56). The only difference is in fusion/fission of chromosomes homologous to horse 2q/3q, which are involved in chromosome number polymorphism in many Equidae species. E. kiang karyotype differs from the karyotype of E. hemionus by two additional fusions 8q/15 and 7/25. Chromosomes equivalent to 2q and 3q are not fused in kiang individuals with 2n = 52. Several discrepancies in centromere positions among kulan, kiang and horse chromosomes have been described. Most of the chromosome fusions in Asiatic asses are of centromere-centromere type. Comparative chromosome painting in kiang completed the efforts to establish chromosomal homologies in all representatives of the family Equidae. Application of region-specific probes allows refinement comparative maps of Asiatic asses.
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Subchromosomal karyotype evolution in Equidae
