Extensive Chromosomal Reorganization in the Evolution of New World Muroid Rodents (Cricetidae, Sigmodontinae): Searching for Ancestral Phylogenetic Traits

PloS One
Adenilson Leão PereiraJ C Pieczarka

Abstract

Sigmodontinae rodents show great diversity and complexity in morphology and ecology. This diversity is accompanied by extensive chromosome variation challenging attempts to reconstruct their ancestral genome. The species Hylaeamys megacephalus--HME (Oryzomyini, 2n = 54), Necromys lasiurus--NLA (Akodontini, 2n = 34) and Akodon sp.--ASP (Akodontini, 2n = 10) have extreme diploid numbers that make it difficult to understand the rearrangements that are responsible for such differences. In this study we analyzed these changes using whole chromosome probes of HME in cross-species painting of NLA and ASP to construct chromosome homology maps that reveal the rearrangements between species. We include data from the literature for other Sigmodontinae previously studied with probes from HME and Mus musculus (MMU) probes. We also use the HME probes on MMU chromosomes for the comparative analysis of NLA with other species already mapped by MMU probes. Our results show that NLA and ASP have highly rearranged karyotypes when compared to HME. Eleven HME syntenic blocks are shared among the species studied here. Four syntenies may be ancestral to Akodontini (HME2/18, 3/25, 18/25 and 4/11/16) and eight to Sigmodontinae (HME26, 1/12, 6/21, 7/9, 5...Continue Reading

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Citations

Jul 21, 2017·PloS One·Stella Miranda MalcherCleusa Yoshiko Nagamachi
Jan 25, 2018·Comparative Cytogenetics·Camilla Bruno Di-NizoMaria José de J Silva
Oct 12, 2019·BMC Evolutionary Biology·Willam Oliveira da SilvaCleusa Yoshiko Nagamachi
Apr 5, 2020·International Journal of Molecular Sciences·Willam Oliveira da SilvaCleusa Yoshiko Nagamachi

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