Smith Paul T
Department of Biology, California State University, Bakersfield, CA 93311, USA.
J Insect Sci. 2005 Dec 22;5:41. doi: 10.1093/jis/5.1.41.
The glassy-winged sharpshooter, Homalodisca coagulata (Homoptera: Cicadellidae), is a highly polyphagous insect species that is distributed throughout most of the southern regions of the United States. In the last 10 years, H. coagualta has become established in California and represents a significant threat to the state's 35 billion dollar wine and table grape industries. DNA sequencing analysis was used to characterize a portion of the mitochondrial cytochrome oxidase I gene from a single population of the smoke tree sharpshooter, Homalodisca liturata, in California and from 20 natural populations of H. coagulata distributed in Tahiti, California, Texas, Louisiana, Mississippi, Alabama, and Florida. The results indicate that H. liturata and H. coagulata are genetically distinct, suggesting that they do not hybridize. Populations of H. coagulata are geographically structured into two groups of haplotypes; a group of populations from east of the Mississippi River including Louisiana, Mississippi, Alabama and Florida and a group comprised of populations west of the Mississippi River from Texas and California, and from Tahiti. There was no genetic structure among haplotypes within the eastern and western groups, respectively. The data also indicates that H. coagulata in California most likely originated from a source in Texas and not from any of the populations east of the Mississippi River.
玻璃翅叶蝉，葡萄斑叶蝉（同翅目：叶蝉科），是一种多食性昆虫物种，分布于美国南部大部分地区。在过去10年里，葡萄斑叶蝉已在加利福尼亚州定殖，对该州价值350亿美元的葡萄酒和鲜食葡萄产业构成重大威胁。利用DNA测序分析对来自加利福尼亚州的烟树斑叶蝉单一种群以及分布于塔希提岛、加利福尼亚州、得克萨斯州、路易斯安那州、密西西比州、亚拉巴马州和佛罗里达州的20个葡萄斑叶蝉自然种群的线粒体细胞色素氧化酶I基因的一部分进行了特征分析。结果表明，烟树斑叶蝉和葡萄斑叶蝉在基因上是不同的，这表明它们不会杂交。葡萄斑叶蝉种群在地理上被划分为两组单倍型；一组是来自密西西比河以东的种群，包括路易斯安那州、密西西比州、亚拉巴马州和佛罗里达州，另一组由来自得克萨斯州、加利福尼亚州以及塔希提岛的密西西比河以西的种群组成。在东部和西部组内的单倍型之间分别没有遗传结构。数据还表明，加利福尼亚州的葡萄斑叶蝉很可能起源于得克萨斯州的一个种群，而不是密西西比河以东的任何种群。
