Low chloroplast diversity despite phylogenetically divergent haplotypes in Japanese populations of Ailanthus altissima (Simaroubaceae)
Low chloroplast diversity despite phylogenetically divergent haplotypes in Japanese populations of Ailanthus altissima (Simaroubaceae)
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DOI：
10.1139/cjb-2012-0159
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发表时间：
2013-03-01
期刊：
影响因子：
1.1
通讯作者：
Ide, Yuji
中科院分区：
文献类型：
--
作者：
Kurokochi, Hiroyuki;Saito, Yoko;Ide, Yuji
臭椿Ailanthus altissima（Mill.）在过去的100年里，在日本，它的分布范围得到了广泛的扩展。我们调查了A. altissima在日本的扩展和引进的人口是否在日本的各个地区是不同的。对A.高树（n = 449）从64个非土著日本人口和4个土著中国人口抽样。鉴定出6种单倍型。在日本人群中检测到3种单倍型（H1、H2和H3），而在中国人群中检测到4种单倍型（H3、H4、H5和H6）。大多数A.在日本的altissima树要么H1要么H3，这两个单倍型在遗传上并不相似。分子变异分析表明，居群间存在一定的遗传分化。此外，未检测到显著的距离隔离。22个日本人群体每个群体内包含两种单倍型，而其他42个日本人群体仅由一种单倍型组成。这些结果表明日本种群的A.高跷可能是从数量有限的种子引进而来，但它们随后在各个地区广泛传播。
Ailanthus altissima (Mill.) Swingle (Simaroubaceae) has succeeded in expanding its distribution widely over the past 100 years in Japan. We investigated which maternal lines of A. altissima are expanding in Japan and whether the introduced populations are different in various regions of Japan. Chloroplast DNA polymorphisms were analyzed on A. altissima trees (n = 449) sampled from 64 nonindigenous Japanese populations and four indigenous Chinese populations. Six haplotypes were identified. Three haplotypes (H1, H2, and H3) were observed in Japan, whereas four (H3, H4, H5, and H6) were detected in Chinese populations. Most A. altissima trees in Japan harbor either H1 or H3, and these two haplotypes were not genetically similar. Analysis of molecular variation showed some genetic differentiation among populations. In addition, significant isolation by distance was not detected. Twenty-two Japanese populations contained two haplotypes within each population, whereas the other 42 Japanese populations were composed of only one haplotype. These results indicate that Japanese populations of A. altissima may have derived from a limited number of seed introductions, but they were then widely spread in various regions.