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Characterizing Genetic Diversity of Contemporary Pacific Chickens Using Mitochondrial DNA Analyses
BACKGROUND: Mitochondrial DNA (mtDNA) hypervariable region (HVR) sequences of prehistoric Polynesian chicken samples reflect dispersal of two haplogroups—D and E—by the settlers of the Pacific. The distribution of these chicken haplogroups has been used as an indicator of human movement. Recent anal...
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Formato: | Texto |
Lenguaje: | English |
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Public Library of Science
2011
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3033910/ https://www.ncbi.nlm.nih.gov/pubmed/21326866 http://dx.doi.org/10.1371/journal.pone.0016843 |
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author | Dancause, Kelsey Needham Vilar, Miguel G. Steffy, Rlene Lum, J. Koji |
author_facet | Dancause, Kelsey Needham Vilar, Miguel G. Steffy, Rlene Lum, J. Koji |
author_sort | Dancause, Kelsey Needham |
collection | PubMed |
description | BACKGROUND: Mitochondrial DNA (mtDNA) hypervariable region (HVR) sequences of prehistoric Polynesian chicken samples reflect dispersal of two haplogroups—D and E—by the settlers of the Pacific. The distribution of these chicken haplogroups has been used as an indicator of human movement. Recent analyses suggested similarities between prehistoric Pacific and South American chicken samples, perhaps reflecting prehistoric Polynesian introduction of the chicken into South America. These analyses have been heavily debated. The current distribution of the D and E lineages among contemporary chicken populations in the Western Pacific is unclear, but might ultimately help to inform debates about the movements of humans that carried them. OBJECTIVES: We sought to characterize contemporary mtDNA diversity among chickens in two of the earliest settled archipelagoes of Remote Oceania, the Marianas and Vanuatu. METHODS: We generated HVR sequences for 43 chickens from four islands in Vanuatu, and for 5 chickens from Guam in the Marianas. RESULTS: Forty samples from Vanuatu and three from Guam were assigned to haplogroup D, supporting this as a Pacific chicken haplogroup that persists in the Western Pacific. Two haplogroup E lineages were observed in Guam and two in Vanuatu. Of the E lineages in Vanuatu, one was identical to prehistoric Vanuatu and Polynesian samples and the other differed by one polymorphism. Contrary to our expectations, we observed few globally distributed domesticate lineages not associated with Pacific chicken dispersal. This might suggest less European introgression of chickens into Vanuatu than expected. If so, the E lineages might represent lineages maintained from ancient Pacific chicken introductions. The Vanuatu sample might thus provide an opportunity to distinguish between maintained ancestral Pacific chicken lineages and replacement by global domesticates through genomic analyses, which could resolve questions of contemporary haplogroup E chicken relationships and inform interpretations of debated sequences from archaeological samples. |
format | Text |
id | pubmed-3033910 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2011 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-30339102011-02-15 Characterizing Genetic Diversity of Contemporary Pacific Chickens Using Mitochondrial DNA Analyses Dancause, Kelsey Needham Vilar, Miguel G. Steffy, Rlene Lum, J. Koji PLoS One Research Article BACKGROUND: Mitochondrial DNA (mtDNA) hypervariable region (HVR) sequences of prehistoric Polynesian chicken samples reflect dispersal of two haplogroups—D and E—by the settlers of the Pacific. The distribution of these chicken haplogroups has been used as an indicator of human movement. Recent analyses suggested similarities between prehistoric Pacific and South American chicken samples, perhaps reflecting prehistoric Polynesian introduction of the chicken into South America. These analyses have been heavily debated. The current distribution of the D and E lineages among contemporary chicken populations in the Western Pacific is unclear, but might ultimately help to inform debates about the movements of humans that carried them. OBJECTIVES: We sought to characterize contemporary mtDNA diversity among chickens in two of the earliest settled archipelagoes of Remote Oceania, the Marianas and Vanuatu. METHODS: We generated HVR sequences for 43 chickens from four islands in Vanuatu, and for 5 chickens from Guam in the Marianas. RESULTS: Forty samples from Vanuatu and three from Guam were assigned to haplogroup D, supporting this as a Pacific chicken haplogroup that persists in the Western Pacific. Two haplogroup E lineages were observed in Guam and two in Vanuatu. Of the E lineages in Vanuatu, one was identical to prehistoric Vanuatu and Polynesian samples and the other differed by one polymorphism. Contrary to our expectations, we observed few globally distributed domesticate lineages not associated with Pacific chicken dispersal. This might suggest less European introgression of chickens into Vanuatu than expected. If so, the E lineages might represent lineages maintained from ancient Pacific chicken introductions. The Vanuatu sample might thus provide an opportunity to distinguish between maintained ancestral Pacific chicken lineages and replacement by global domesticates through genomic analyses, which could resolve questions of contemporary haplogroup E chicken relationships and inform interpretations of debated sequences from archaeological samples. Public Library of Science 2011-02-04 /pmc/articles/PMC3033910/ /pubmed/21326866 http://dx.doi.org/10.1371/journal.pone.0016843 Text en Dancause et al. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Dancause, Kelsey Needham Vilar, Miguel G. Steffy, Rlene Lum, J. Koji Characterizing Genetic Diversity of Contemporary Pacific Chickens Using Mitochondrial DNA Analyses |
title | Characterizing Genetic Diversity of Contemporary Pacific Chickens Using Mitochondrial DNA Analyses |
title_full | Characterizing Genetic Diversity of Contemporary Pacific Chickens Using Mitochondrial DNA Analyses |
title_fullStr | Characterizing Genetic Diversity of Contemporary Pacific Chickens Using Mitochondrial DNA Analyses |
title_full_unstemmed | Characterizing Genetic Diversity of Contemporary Pacific Chickens Using Mitochondrial DNA Analyses |
title_short | Characterizing Genetic Diversity of Contemporary Pacific Chickens Using Mitochondrial DNA Analyses |
title_sort | characterizing genetic diversity of contemporary pacific chickens using mitochondrial dna analyses |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3033910/ https://www.ncbi.nlm.nih.gov/pubmed/21326866 http://dx.doi.org/10.1371/journal.pone.0016843 |
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