Cooper A, Cooper R A
National Zoological Park, Smithsonian Institution, Washington, DC 20008, USA.
Proc Biol Sci. 1995 Sep 22;261(1362):293-302. doi: 10.1098/rspb.1995.0150.
Mitochondrial DNA (mtDNA) 12S sequences from the two New Zealand ratite orders, the kiwi and moa, indicate that each group represents a separate colonization event. However, the amount of mtDNA genetic diversity observed within each of the New Zealand groups is similar, and limited, which is not consistent with the ratite phylogenetic tree. We examine the Cenozoic (65-0 million years ago) geological history of New Zealand for possible causes and summarize evidence for land area and climatic changes. A genetic bottleneck is hypothesized and tested, by using molecular data from a second mitochondrial locus (ND6) and a further taxon, the New Zealand acanthisittid wrens. The data support the existence of a widespread genetic bottleneck during the mid-Cenozoic in New Zealand and demonstrate the benefits of synthesizing traditional research with new molecular techniques.
来自新西兰两种平胸鸟类（几维鸟和恐鸟）的线粒体DNA（mtDNA）12S序列表明，每个群体代表一次独立的定殖事件。然而，在新西兰的每个群体中观察到的mtDNA遗传多样性数量相似且有限，这与平胸鸟类系统发育树不一致。我们研究了新西兰新生代（6500万年前至0年前）的地质历史以寻找可能的原因，并总结了陆地面积和气候变化的证据。通过使用来自第二个线粒体基因座（ND6）的分子数据以及另一个分类群——新西兰刺鹩，对遗传瓶颈进行了假设和检验。数据支持了新西兰在新生代中期存在广泛遗传瓶颈的观点，并证明了将传统研究与新分子技术相结合的益处。
