文章基本信息

标题：Extreme variation in patterns of tandem repeats in mitochondrial control region of yellow-browed tits (Sylviparus modestus, Paridae)
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作者：Xiaoyang Wang ; Nian Liu ; Hongli Zhang 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
DOI：10.1038/srep13227
出版社：Springer Nature
摘要：To investigate the evolutionary pattern and origins of tandem repeats in the mitochondrial control region of the yellow-browed tit ( Sylviparus modestus ), the control region and another four mitochondrial loci from fifteen individuals were analyzed. A 117-bp tandem repeat unit that repeated once, twice or three times in different individuals was found, and a rarely reported arrangement for this tandem repeats region that a 5′ imperfect copy at its downstream and a 3′ imperfect copy at its upstream was observed. The haplotype network, phylogenetic trees, and ancestral state reconstruction of the combined dataset of five loci suggested multiple origins of the same repeat number. The turnover model via slipped-strand mispairing was introduced to interpret the results, because mispairing occurred so frequently that multiple origins of certain repeat number were observed. Insertion via recombination should be a better explanation for the origin of this tandem repeat unit, considering characteristics of the combined sequence of the 3′ and 5′ imperfect copy, including identification of its homolog in other passerines and its predicted secondary structure.