Complete mitochondrial genome of a sun bear from Malaysia and its position in the phylogeny of Ursidae

Lai, Wai Ling; Ratnayeke, Shyamala; Austin, Christopher M.; Rahman, Sadequr; Ayub, Qasim; Kulaimi, Noor Azleen Mohd; Kuppusamy, Sagathevan; Chew, Jactty

doi:10.2192/ursus-d-20-00032.1

Cited by 2 publications

(12 citation statements)

References 32 publications

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“…Consistent with the mitogenome phylogeny, both clades, Mainland and Sunda, are apparent in the MJ network, whereby the Mainland clade was enlarged by Thailand samples T7, T8, T9, T10 and T14 (from Lai et al 2021).…”

Section: Shorter Mtdna Sequencessupporting

confidence: 60%

“…We also considered the 34 mitogenome sequences in the context of a recent phylogenetic study on shorter mtDNA sequences of sun bears from Thailand (it is unknown if these samples originated from North or South of the Isthmus of Kra), Peninsular Malaysia and Borneo (Lai et al 2021) and constructed a median-joining (MJ) network from this combined dataset ( N = 116 sequences; alignment length 1,466 bp; Figure 3).…”

Section: Resultsmentioning

confidence: 99%

“…The number of mutations separating connected haplotypes is indicated by the number of dashes along the connecting line. Black labels indicate the two major mtDNA clades; grey labels indicate lineages previously reported by Lai et al (2021). Colouring of haplotypes is according to geographic origin (if known), following inset map (bottom left).…”

Section: Resultsmentioning

confidence: 99%

“…MW316324 - MW316405; Lai et al 2021). This combined dataset of shorter sequences consisted of 116 mtDNA sequences: 32 from this study, 82 from Lai et al (2021), one from Yu et al (2007), and one from Krause et al (2008) (Suppl. Table S4).…”

Section: Methodsmentioning

confidence: 99%

“…To date, studies of H. malayanus using molecular markers have been limited in geographic scope (Onuma et al 2006; Kunde et al 2020; Lai et al 2021) and we thus lack knowledge about the distribution of intraspecific genetic diversity across this species’ range. To address this shortcoming, we sequenced mitochondrial genomes from samples across a large portion of the sun bear distribution, utilizing both archival material from natural history museums as well as non-invasively collected material (saliva).…”

Section: Introductionmentioning

confidence: 99%

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First mitogenome phylogeny of the sun bear Helarctos malayanus reveals a deep split between Indochinese and Sundaic lineages

Kunde

Barlow

Klittich

et al. 2022

Preprint

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The sun bear Helarctos malayanus is one of the most endangered ursids, and to date classification of sun bear populations has been based almost exclusively on geographic distribution and morphology. The very few molecular studies focusing on this species were limited in geographic scope. Using archival and non-invasively collected sample material, we have added a substantial number of complete or near-complete mitochondrial genome sequences from sun bears of several range countries of the species’ distribution. We here report 32 new mitogenome sequences representing sun bears from Cambodia, Thailand, Peninsular Malaysia, Sumatra and Borneo. Reconstruction of phylogenetic relationships revealed two matrilines that diverged ∼290 thousand years ago: one restricted to portions of mainland Indochina (China, Cambodia, Thailand; “Mainland clade”), and one comprising bears from Borneo, Sumatra, Peninsular Malaysia but also Thailand (“Sunda clade”). Generally recent coalescence times in the mitochondrial phylogeny suggest that recent or historical demographic processes have resulted in a loss of mtDNA variation. Additionally, analysis of our data in conjunction with shorter mtDNA sequences revealed that the Bornean sun bear, classified as a distinct subspecies (H. m. euryspilus), does not harbour a distinctive matriline. Further molecular studies of H. malayanus are needed, which should ideally include data from nuclear loci.

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Section: Shorter Mtdna Sequencessupporting

confidence: 60%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

First mitogenome phylogeny of the sun bear Helarctos malayanus reveals a deep split between Indochinese and Sundaic lineages

Kunde

Barlow

Klittich

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

First mitogenome phylogeny of the sun bear Helarctos malayanus reveals a deep split between Indochinese and Sundaic lineages

Kunde

Barlow

Klittich

et al. 2023

Ecology and Evolution

View full text Add to dashboard Cite

The sun bear Helarctos malayanus is one of the most endangered ursids, and to date classification of sun bear populations has been based almost exclusively on geographic distribution and morphology. The very few molecular studies focussing on this species were limited in geographic scope. Using archival and non-invasively collected sample material, we have added a substantial number of complete or near-complete mitochondrial genome sequences from sun bears of several range countries of the species' distribution. We here report 32 new mitogenome sequences representing sun bears from Cambodia, Thailand, Peninsular Malaysia, Sumatra, and Borneo.Reconstruction of phylogenetic relationships revealed two matrilines that diverged ~295 thousand years ago: one restricted to portions of mainland Indochina (China, Cambodia, Thailand; "Mainland clade"), and one comprising bears from Borneo, Sumatra, Peninsular Malaysia but also Thailand ("Sunda clade"). Generally recent coalescence times in the mitochondrial phylogeny suggest that recent or historical demographic processes have resulted in a loss of mtDNA variation. Additionally, analysis of our data in conjunction with shorter mtDNA sequences revealed that the Bornean sun bear, classified as a distinct subspecies (H. m. euryspilus), does not harbor a distinctive matriline. Further molecular studies of H. malayanus are needed, which should ideally include data from nuclear loci.

show abstract

Complete mitochondrial genome of a sun bear from Malaysia and its position in the phylogeny of Ursidae

Cited by 2 publications

References 32 publications

First mitogenome phylogeny of the sun bear Helarctos malayanus reveals a deep split between Indochinese and Sundaic lineages

First mitogenome phylogeny of the sun bear Helarctos malayanus reveals a deep split between Indochinese and Sundaic lineages

First mitogenome phylogeny of the sun bear Helarctos malayanus reveals a deep split between Indochinese and Sundaic lineages

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