Ancestral polymorphisms and sex-biased migration shaped the demographic history of brown bears and polar bears.

Recent studies have reported discordant gene trees in the evolution of brown bears and polar bears. Genealogical histories are different among independent nuclear loci and between biparentally inherited autosomal DNA (aDNA) and matrilineal mitochondrial DNA (mtDNA). Based on multi-locus genomic sequ...

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Autores principales:	Shigeki Nakagome, Shuhei Mano, Masami Hasegawa
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8c3ac6af25db4999aa1789dec3ef82e3
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spelling	oai:doaj.org-article:8c3ac6af25db4999aa1789dec3ef82e32021-11-18T08:46:54ZAncestral polymorphisms and sex-biased migration shaped the demographic history of brown bears and polar bears.1932-620310.1371/journal.pone.0078813https://doaj.org/article/8c3ac6af25db4999aa1789dec3ef82e32013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24236053/?tool=EBIhttps://doaj.org/toc/1932-6203Recent studies have reported discordant gene trees in the evolution of brown bears and polar bears. Genealogical histories are different among independent nuclear loci and between biparentally inherited autosomal DNA (aDNA) and matrilineal mitochondrial DNA (mtDNA). Based on multi-locus genomic sequences from aDNA and mtDNA, we inferred the population demography of brown and polar bears and found that brown bears have 6 times (aDNA) or more than 14 times (mtDNA) larger population sizes than polar bears and that polar bear lineage is derived from within brown bear diversity. In brown bears, the effective population size ratio of mtDNA to aDNA was at least 0.62, which deviated from the expected value of 0.25, suggesting matriarchal population due to female philopatry and male-biased migration. These results emphasize that ancestral polymorphisms and sex-biased migration may have contributed to conflicting branching patterns in brown and polar bears across aDNA genes and mtDNA.Shigeki NakagomeShuhei ManoMasami HasegawaPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 11, p e78813 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Shigeki Nakagome Shuhei Mano Masami Hasegawa Ancestral polymorphisms and sex-biased migration shaped the demographic history of brown bears and polar bears.
description	Recent studies have reported discordant gene trees in the evolution of brown bears and polar bears. Genealogical histories are different among independent nuclear loci and between biparentally inherited autosomal DNA (aDNA) and matrilineal mitochondrial DNA (mtDNA). Based on multi-locus genomic sequences from aDNA and mtDNA, we inferred the population demography of brown and polar bears and found that brown bears have 6 times (aDNA) or more than 14 times (mtDNA) larger population sizes than polar bears and that polar bear lineage is derived from within brown bear diversity. In brown bears, the effective population size ratio of mtDNA to aDNA was at least 0.62, which deviated from the expected value of 0.25, suggesting matriarchal population due to female philopatry and male-biased migration. These results emphasize that ancestral polymorphisms and sex-biased migration may have contributed to conflicting branching patterns in brown and polar bears across aDNA genes and mtDNA.
format	article
author	Shigeki Nakagome Shuhei Mano Masami Hasegawa
author_facet	Shigeki Nakagome Shuhei Mano Masami Hasegawa
author_sort	Shigeki Nakagome
title	Ancestral polymorphisms and sex-biased migration shaped the demographic history of brown bears and polar bears.
title_short	Ancestral polymorphisms and sex-biased migration shaped the demographic history of brown bears and polar bears.
title_full	Ancestral polymorphisms and sex-biased migration shaped the demographic history of brown bears and polar bears.
title_fullStr	Ancestral polymorphisms and sex-biased migration shaped the demographic history of brown bears and polar bears.
title_full_unstemmed	Ancestral polymorphisms and sex-biased migration shaped the demographic history of brown bears and polar bears.
title_sort	ancestral polymorphisms and sex-biased migration shaped the demographic history of brown bears and polar bears.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/8c3ac6af25db4999aa1789dec3ef82e3
work_keys_str_mv	AT shigekinakagome ancestralpolymorphismsandsexbiasedmigrationshapedthedemographichistoryofbrownbearsandpolarbears AT shuheimano ancestralpolymorphismsandsexbiasedmigrationshapedthedemographichistoryofbrownbearsandpolarbears AT masamihasegawa ancestralpolymorphismsandsexbiasedmigrationshapedthedemographichistoryofbrownbearsandpolarbears
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Ancestral polymorphisms and sex-biased migration shaped the demographic history of brown bears and polar bears.

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