The Expansion Route of Ryegrasses (Lolium spp.) into Sandy Coasts in Japan
The Expansion Route of Ryegrasses (Lolium spp.) into Sandy Coasts in Japan
复制标题
黑麦草（黑麦草属）向日本沙滩的扩张路线
DOI：
--
复制
发表时间：
2017
影响因子：
1.1
通讯作者：
T. Tominaga
中科院分区：
文献类型：
--
作者：
Yumiko Higuchi;Yoshiko Shimono;T. Tominaga
虽然越来越多的调查已经取得了外来物种的进化，一旦引入，很少有研究确定这些引进物种的入侵途径。由于多次引进在入侵物种中很常见，因此在研究外来物种开始扩展其范围后的进化变化时，不考虑引进的谱系可能会产生误导。在日本，黑麦草（Lolium spp.）作为饲料作物和贸易谷物中的污染物引入，并已扩展到桑迪海岸。我们研究了扩展路线的人口建立沿着海岸的三个地理区域在日本通过比较形态和核微卫星和叶绿体DNA的变化，在两个栖息地，其中黑麦草首次介绍：农田和国际海港。叶绿体DNA单倍型没有显着不同的栖息地和地区，但沿海和海港人群表现出相似的微卫星遗传组成和形态特征。我们的研究结果表明，沿海人口起源于海港人口来自污染物。来自过去的选择性力量，包括驯化和归化，可能有助于引入的谱系在新的栖息地殖民。名称：多花黑麦草（Lolium multiflorum L.）硬花黑麦草Lolium rigidum Gaudin
Although an increasing number of investigations have been made into the evolution of alien species once introduced, few studies have identified the invasion routes of these introduced species. Because multiple introductions are common in invasive species, failing to take into account the introduced lineages can be misleading when studying evolutionary change in alien species after they begin to extend their ranges. In Japan, diverse lineages of ryegrasses (Lolium spp.) were introduced as forage crops and contaminants in trading grain and have expanded to sandy coasts. We studied the expansion route of populations established along the coasts of three geographic regions within Japan by comparing variations in morphology and nuclear microsatellite and chloroplast DNA in the two habitats where ryegrasses were first introduced: croplands and international seaports. Chloroplast DNA haplotypes did not differ significantly among habitats and regions, but the coastal and seaport populations displayed similar microsatellite genetic compositions and morphological characteristics. Our results revealed that coastal populations originated from seaport populations derived from contaminants. Selective forces from the past, including domestication and naturalization, may have assisted the introduced lineages in colonizing new habitats. Nomenclature: Italian ryegrass, Lolium multiflorum L.; rigid ryegrass, Lolium rigidum Gaudin.
DOI：
10.1073/pnas.84.24.9054
发表时间：
1987-12-01
影响因子：
11.1
作者：
WOLFE, KH;LI, WH;SHARP, PM
通讯作者：
SHARP, PM