@conference {16443, title = {THE MOLECULAR COMPOSITION OF THE SEX CHROMOSOMES IN MICROTUS THOMASI: HOW DOES THE POLYMORPHIC X AND Y ORIGINATE?}, booktitle = {12TH INTERNATIONAL CONGRESS ON THE ZOOGEOGRAPHY AND ECOLOGY OF GREECE AND ADJACENT REGIONS}, year = {2012}, month = {18 {\textendash} 22 June}, publisher = {HELLENIC ZOOLOGICAL SOCIETY}, organization = {HELLENIC ZOOLOGICAL SOCIETY}, address = {Athens}, keywords = {DNA, karyotype, Microtus thomasi, molecular composition, polymorphism, Rodentia, sex chromosomes, καρυότυπος, μοριακή σύσταση, πολυμορφισμός, τρωκτικά, φυλετικά χρωμοσώματα}, author = {Rovatsos, M. Th. and Marchal, J. A. and Romero-Fern{\'a}ndez, I. and Cano-Linares, M. and Giagia-Athanasopoulou, E. B. and Sanchez, A.} } @article {2538, title = {A new pericentromeric repeated DNA sequence in Microtus thomasi}, journal = {Cytogenetic and Genome Research}, volume = {124}, number = {1}, year = {2009}, month = {2009}, pages = {27-36}, abstract = {

Several karyotypic forms have been previously described in populations of the vole species Microtus thomasi from Greece. In particular, the karyomorphs Microtus thomasi \‘thomasi\’ and \‘atticus\’ differ in X chromosome morphology, being acrocentric and subtelocentric, respectively. Furthermore, remarkable heterochromatin content variability has been described in sex chromosomes of both karyomorphs. Genomic DNA digestion with AluI allowed us to clone an 884 bp long repeated DNA sequence (Mth-Alu900) from the karyomorph M. thomasi \‘atticus\’. This repeated DNA is AT rich and seems to be organized mainly as a dimer of the 884-bp unit, which presents three simple repeats (CAAAT, CAGAT and CAGAC) that constitute 80\% of the total unit length. This repeated DNA is exclusive to M. thomasi, since it is absent from the genome of other studied Arvicolinae species. The chromosomal location of Mth-Alu900 was analyzed on M. thomasi \‘thomasi\’ and M. thomasi \‘atticus\’ karyomorphs, with different sex chromosome constitution. It was mainly located on the pericentromeric heterochromatin of most autosomes and X chromosomes on both karyomorphs. Results are also discussed in relation to karyotypic and sex chromosome variations in M. thomasi. To our knowledge, Mth-Alu900 constitutes a new \– the third discovered so far \– pericentromeric repeated DNA sequence described in Microtus species.

}, keywords = {DNA, pericentromeric, repeated, sequence, αλληλουχία, επαναλαμβανόμενη, περικεντρομερική}, isbn = {1424-8581}, url = {https://www.researchgate.net/publication/24283515_A_new_pericentromeric_repeated_DNA_sequence_in_Microtus_thomasi}, author = {Acosta, M. and Marchal, J. and Mitsainas, G. and Rovatsos, M. and Fernandez-Espartero, C. and Giagia-Athanasopoulou, E. and Sanchez, A.} }