Analysis of meiotic chromosome structure and behavior in Robertsonian heterozygotes of Ellobius tancrei (Rodentia, Cricetidae): a case of monobrachial homology

Abstract. (SC) chains were revealed in semisterile intraspecific F1 hybrids of Ellobius tancrei Blasius, 1884 (2n = 49, NF=56 and 2n=50, NF=56), heterozygous for (Rb) translocations. Chains were formed by Rb submetacentrics with monobrachial homology. Chromosome synapsis in spermatocytes of these hy...

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Detalles Bibliográficos
Autores principales: Matveevsky, Sergey, Bakloushinskaya, Irina, Tambovtseva, Valentina, Romanenko, Svetlana, Kolomiets, Oxana
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Pensoft Publishers 2015
Materias:
Research Articles
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4698581/
https://www.ncbi.nlm.nih.gov/pubmed/26752380
http://dx.doi.org/10.3897/CompCytogen.v9i4.5674
Descripción
Sumario:Abstract. (SC) chains were revealed in semisterile intraspecific F1 hybrids of Ellobius tancrei Blasius, 1884 (2n = 49, NF=56 and 2n=50, NF=56), heterozygous for (Rb) translocations. Chains were formed by Rb submetacentrics with monobrachial homology. Chromosome synapsis in spermatocytes of these hybrids was disturbed, apparently because of the problematic release of the chromosomes from the SC chains. These hybrids suffer from low fertility, and our data support the opinion that this is because a formation of Rb metacentrics with monobrachial homology within different races of the same species might be an initial event for the divergence of chromosomal forms.

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