Molecular Characterization of Species of the Subgenus Mus from Myanmar

Zaw, Khin Myat Myat; Thwe, Thidalay; Shimada, Tomofumi; Theint, San Maung Maung; Saing, Khin Maung; Bawm, Saw; Katakura, Ken; Suzuki, Hitoshi

doi:10.2108/zs180161

Cited by 5 publications

(9 citation statements)

References 31 publications

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“…These results suggest that human activities during the Holocene were involved in driving the sudden expansion of M. musculus in Myanmar (Fig. 4), as has been predicted previously (Myat Myat Zaw et al 2019). In our previous study, we showed that the CAS-1 lineage experienced two expansion events (Suzuki et al 2013;Kuwayama et al 2017), which occurred 7000-8000 years ago in India and around 4000 years ago in China.…”

Section: Discussionsupporting

confidence: 79%

“…For M. musculus, all haplotypes from Myanmar belonged to CAS-1, which is known to occupy Pakistan, India, and Southeast and East Asian countries including China (Suzuki et al 2013;Chingangbam et al 2015;Bibi et al 2017;Myat Myat Zaw et al 2019). In this study, Myanmar haplotypes, together with those of the neighboring area of easternmost India (Manipur), are shown to form a star-like cluster (Table 2, Fig.…”

Section: Discussionmentioning

confidence: 50%

“…The CAS-1 sublineage experienced a secondary expansion event in southern China that extended its range to Japan and southern Sakhalin (Suzuki et al 2013). In a previous study, the extent of genetic diversity in Cytb sequences was found to be relatively small in Myanmar (Suzuki et al 2013;Myat Myat Zaw et al 2019), indicating that recent structuring of the population had occurred due to the introduction of human agricultural systems in Southeast Asia including Myanmar. However, details of the evolutionary progress of M. musculus in Myanmar are not yet known.…”

Section: Introductionmentioning

confidence: 94%

“…In the Indo-Malayan region, the Arakan Mountain system on the border of India and Myanmar may act as a geographic barrier, dividing the region into two parts (Chingangbam et al 2015). Mountain ranges have been shown to act as borders between species or local intraspecies phylogroups in species of the genus Mus (Shimada et al 2007(Shimada et al , 2009(Shimada et al , 2010Myat Myat Zaw et al 2019). Widespread taxonomic groups are ideal systems for testing biogeographical hypotheses, as they provide an opportunity for examining how geographical barriers, as well as the processes of dispersal and colonization, affect diversification and determine biogeographical distribution patterns (e.g., Irschick et al 1997).…”

Section: Introductionmentioning

confidence: 99%

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Late Quaternary Environmental and Human Impacts on the Mitochondrial DNA Diversity of Four Commensal Rodents in Myanmar

et al. 2020

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We addressed the spatiotemporal characteristics of four commensal rodent species occurring in Myanmar in comparison with other areas of the Indo-Malayan region. We examined sequence variations of the mitochondrial cytochrome b gene (Cytb) in the Pacific rat (Rattus exulans), roof rat (Rattus rattus complex, RrC), lesser bandicoot rat (Bandicota bengalensis), and house mouse (Mus musculus) using the recently developed time-dependent evolutionary rates of mtDNA. The Cytb sequences of RrC from Myanmar were shown to belong to RrC Lineage II, and their level of genetic diversity was relatively high compared to those of the other three species. RrC was found to have experienced bottleneck and rapid expansion events at least twice in the late Pleistocene period in Myanmar and a nearby region. Accordingly, paleoclimatic environmental fluctuations were shown to be an important factor affecting rodents in the subtropics of the Indo-Malayan region. Our results show that human activities during the last 10,000 years of the Holocene period affected the population dynamics of the rodent species examined, including introducing them to Myanmar from neighboring countries. Further study of these four commensal rodents in other geographic areas of the Indo-Malayan region would allow us to better understand the factors that drove their evolution and their ecological trends.

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Section: Discussionsupporting

confidence: 79%

Section: Discussionmentioning

confidence: 50%

Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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Late Quaternary Environmental and Human Impacts on the Mitochondrial DNA Diversity of Four Commensal Rodents in Myanmar

et al. 2020

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“…If we assume that these two distinct mtDNA lineages represent the populations of Thailand and Myanmar, the western edge of the current B. savilei population in Myanmar may be an ancient residence, dating back to around 0.64 Mya. Similar phylogenetic traits can be seen in other murine rodents in Myanmar; these occur as the endemic species Mus lepidoides (Shimada et al 2010) and Mus nitidulus (Shimada et al 2007;Myat Myat Zaw et al 2019), and as a distinct population lineage, Mus caroli (d = ca. 0.02, Shimada et al 2007;Myat Myat Zaw et al 2019).…”

Section: Population Dynamics Of Bandicota Speciesmentioning

confidence: 58%

Species and genetic diversity of Bandicota (Murinae, Rodentia) from Myanmar based on mitochondrial and nuclear gene sequences

et al. 2020

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Bandicoot rats (genus Bandicota), widely known as rodent pests, are abundant and widespread throughout the continental part of the Indo-Malayan Realm. However, their evolutionary history is not yet well understood. The molecular phylogenetic relationships of the three bandicoot rat species, Bandicota bengalensis, B. indica, and B. savilei, were assessed based on the gene sequences of specimens collected from Myanmar, where all three species occur, along with database sequences. Early divergence of B. savilei (1.5-1.7 million years ago) was inferred from the mitochondrial cytochrome b (Cytb) gene, and the nuclear interphoto-receptor retinoid binding protein (Irbp), and melanocortin 1 receptor (Mc1r) gene sequences. The Cytb lineage of B. bengalensis from Sri Lanka was distinct from the monophyletic lineage of the continental lineages of B. bengalensis and B. indica. This can be explained by the preservation of ancient mitochondrial DNA (mtDNA) in the insular population owing to female philopatry and male dispersal, given that no substantial intraspecies geographic subdivision was observed in the nuclear markers. The paraphyletic relationship of B. bengalensis with B. indica may be explained by introgression of the mtDNA from B. bengalensis to B. indica, but further investigation is required to confirm this. B. bengalensis Cytb sequences from a wide area of Myanmar had limited nucleotide diversity (π = 0.00079), implying that the genetic diversity of B. bengalensis in Myanmar was acquired through Holocene human activities.

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Morphological and Molecular Recharacterization of the Rodent Genus Mus from Nepal Based on Museum Specimens

2021

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The taxonomy and phylogeny of the subgenus Mus, the Eurasian lineage of the genus Mus, remain unresolved, even for the house mouse (Mus musculus). While the subgenus is diverse in Asia, few studies cover both its morphology and molecular phylogeny. We re-examined 70 specimens identified as M.cervicolor that were collected from central Nepal in 1968 and 1975 and are currently deposited in the Hokkaido University Natural History Museum. To compare morphological features, we examined skull geometric morphometrics and body coloration, and performed a phylogenetic analysis of the mitochondrial cytochrome b gene sequences of representative specimens. The specimens were most likely either M. booduga or M. musculus. The best morphological characteristics for distinguishing the two species were the nasal length ratio, which was high and low, respectively. Mus booduga was found to inhabit altitudes lower than 1000 m and have light ventral fur, while M. musculus inhabited various altitudes up to 3000 m and had variable fur color depending on the altitude. We also discuss the taxonomic status of the fawn-colored mouse M. cervicolor.

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Molecular Characterization of Species of the Subgenus Mus from Myanmar

Cited by 5 publications

References 31 publications

Late Quaternary Environmental and Human Impacts on the Mitochondrial DNA Diversity of Four Commensal Rodents in Myanmar

Late Quaternary Environmental and Human Impacts on the Mitochondrial DNA Diversity of Four Commensal Rodents in Myanmar

Species and genetic diversity of Bandicota (Murinae, Rodentia) from Myanmar based on mitochondrial and nuclear gene sequences

Morphological and Molecular Recharacterization of the Rodent Genus Mus from Nepal Based on Museum Specimens

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