4.3 Article

Centromeric Satellite DNA in Flatfish (Order Pleuronectiformes) and Its Relation to Speciation Processes

期刊

JOURNAL OF HEREDITY
卷 108, 期 2, 页码 217-222

出版社

OXFORD UNIV PRESS INC
DOI: 10.1093/jhered/esw076

关键词

centromeric satellite DNA; flatfishes; molecular evolution; speciation

资金

  1. Spanish Ministry of Science and Innovation [AGL2009-11872]
  2. PLEUROGENE (GEN) project - Genome Canada-Genoma Espana joint programme
  3. Consolider-Ingenio AQUAGENOMICS Project [CSD2007-00002]

向作者/读者索取更多资源

Two new centromeric satellite DNAs in flatfish (Order Pleuronectiformes) have been characterized. The SacI-family from Hippoglossus hippoglossus, restricted to this species, had a monomeric size of 334 base pair (bp) and was located in most of the centromeres of its karyotype. The PvuII-family, with a monomeric size of 177 bp, was initially isolated from the genome of Solea senegalensis, and fluorescent in situ hybridization (FISH) localized the repeat to centromeres of most of the chromosomes. This family could only be amplified in 2 other species of the genus Solea (Solea solea and Solea lascaris). Molecular features and chromosomal location indicated a possible structural and/or functional role of these sequence repeats. The presence of species-specific satellite-DNA families in the centromeres and their possible role in the speciation processes in this group of fishes is discussed.

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