Bridging Near and Remote Oceania: mtDNA and NRY Variation in the Solomon Islands
Bridging Near and Remote Oceania: mtDNA and NRY Variation in the Solomon Islands
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DOI：
10.1093/molbev/msr186
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发表时间：
2012-02-01
影响因子：
10.7
通讯作者：
Stoneking, Mark
中科院分区：
文献类型：
--
作者：
Delfin, Frederick;Myles, Sean;Stoneking, Mark
虽然遗传学研究极大地促进了我们对近大洋洲和远大洋洲殖民化的理解，但仍然存在重要的差距。其中一个差距是所罗门群岛，该群岛位于布干维尔和瓦努阿图之间，因此连接了近大洋洲和远大洋洲，包括讲南岛语和讲巴布亚语的群体。在这里，我们描述了模式的线粒体DNA（mtDNA）和非重组Y染色体（NRY）的变化，在所罗门群岛，包括11个南岛语的群体，3个巴布亚语的群体，和4个波利尼西亚离群值（通过从波利尼西亚移民回来）的18个人口超过700个人。我们在古老的NRY paragroups以及M2-M353中发现了古代（前拉皮塔）所罗门殖民的证据，M2-M353可能出现在所罗门，类似于9,200年前，是那里最常见的NRY单倍群。说南岛语的群体和说巴布亚语的群体之间没有一致的遗传差异，这表明它们之间存在广泛的遗传接触。位于遥远大洋洲的圣克鲁斯，显示出不寻常的低频率的线粒体DNA和NRY单倍型群最近的亚洲祖先。这显然与基于考古学和语言学证据的早期（类似于3，200年前）的预期相矛盾，来自俾斯麦群岛的拉皮塔人直接殖民于圣克鲁斯，通过“蛙跳式”迁移超过所罗门群岛的其他地区。波利尼西亚离群值显示戏剧性的岛屿特定的创始人事件涉及各种NRY单倍群。我们还发现，NRY，但不是mtDNA，遗传距离与所罗门群岛群体之间的地理距离，历史证明领域的文化互动与所罗门群岛群体的最近的遗传结构，如mtDNA HV 1序列和Y-STR单倍型多样性所揭示的。我们的研究结果填补了大洋洲人类遗传学研究的一个重要空白，有助于了解该地区的殖民和遗传历史。
Although genetic studies have contributed greatly to our understanding of the colonization of Near and Remote Oceania, important gaps still exist. One such gap is the Solomon Islands, which extend between Bougainville and Vanuatu, thereby bridging Near and Remote Oceania, and include both Austronesian-speaking and Papuan-speaking groups. Here, we describe patterns of mitochondrial DNA (mtDNA) and nonrecombining Y chromosome (NRY) variation in over 700 individuals from 18 populations in the Solomons, including 11 Austronesian-speaking groups, 3 Papuan-speaking groups, and 4 Polynesian Outliers (descended via back migration from Polynesia). We find evidence for ancient (pre-Lapita) colonization of the Solomons in old NRY paragroups as well as from M2-M353, which probably arose in the Solomons similar to 9,200 years ago and is the most frequent NRY haplogroup there. There are no consistent genetic differences between Austronesian-speaking and Papuan-speaking groups, suggesting extensive genetic contact between them. Santa Cruz, which is located in Remote Oceania, shows unusually low frequencies of mtDNA and NRY haplogroups of recent Asian ancestry. This is in apparent contradiction with expectations based on archaeological and linguistic evidence for an early (similar to 3,200 years ago), direct colonization of Santa Cruz by Lapita people from the Bismarck Archipelago, via a migration that "leapfrogged" over the rest of the Solomons. Polynesian Outliers show dramatic island-specific founder events involving various NRY haplogroups. We also find that NRY, but not mtDNA, genetic distance is correlated with the geographic distance between Solomons groups and that historically attested spheres of cultural interaction are associated with the recent genetic structure of Solomons groups, as revealed by mtDNA HV1 sequence and Y-STR haplotype diversity. Our results fill an important lacuna in human genetic studies of Oceania and aid in understanding the colonization and genetic history of this region.