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題名 | 應用粒線體16S rDNA探討臺灣地區中國梨木蝨之遺傳變異=Genetic Variation of Cacopsylla Chinensis (Hemiptera: Psyllidae) in Taiwan Based on Mitochondrial 16S rDNA Sequence |
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作者 | 利軒仲; 楊曼妙; 葉文斌; 李法聖; Lee, Hsien-chung; Yang, Man-miao; Yeh, Wen-bin; Li, Fasheng; |
期刊 | 臺灣昆蟲 |
出版日期 | 20070600 |
卷期 | 27:2 2007.06[民96.06] |
頁次 | 頁157-168 |
分類號 | 387.797 |
語文 | chi |
關鍵詞 | 中國梨木蝨; 16S核醣體去氧核醣核酸; 入侵種; 遺傳變異; Cacopsylla chinensis; 16S rDNA; Introduced species; Genetic variation; |
中文摘要 | 中國梨木蝨(Cacopsylla chinensis (Yang and Li)),是新近入侵台灣的害蟲,首先於2002年在台灣中部梨園發現並不斷擴散至其他區域,此種木蝨危害嚴重且體色變異極大,具有淡色型與深色型。危害梨樹的木蝨種類繁多,但不同種間外部形態僅具微小差異,而同種內常具有冬夏二型,不易區分;本文應用粒線體16S核醣體去氧核醣核酸(165rDNA)的DNA序列進行分析,探討台灣地區中國梨木蝨的分子變異及其分化情形。木蝨標本來源包括取樣自台灣不同地區的14個中國梨木蝨族群與2個中國大陸族群,另包含台灣3個黔梨木蝨族群,與2種近緣屬之外群。結果顯示黔梨木蝨(C. qianli)與中國梨木蝨(C. chinensis),均分別為單源群,二者之序列平均差異為9.7%。而台灣地區之中國梨木蝨可再分為兩群,群閒差異達2.5%,其中一群包括多數台灣地區族群,中國大陸的中國梨木蝨個體;但台中東勢、和平及新竹尖石部分個體則另成一群。此一現象可能源自於台灣地區的中國梨木蝨有多次入侵的情形,由鄰近不同地區的木蝨族群侵入台灣而致,而此兩支系是否為不同種仍有待進一步釐清。 |
英文摘要 | Variably colored pear psyllids, which caused serious damage to pears, have been found in pear orchards in central Taiwan since 2002 and have continued to disperse to other areas. Identification based on adult morphological characters confirmed that the pest is Cacopsylla chinensis (Yang and Li), which is a newly invasive species. The slight morphological variations among species and the seasonal dimorphism within species usually lead to difficulties in identification of many pear psyllids. Herein, we used the sequence of the 16S rDNA region to analyze the genetic variation of C. chinensis. Specimens analyzed included C. chinensis from 14 Taiwanese and two China populations, C. qianli from three populations, and two other Psylla species. Phylogenetic results clearly separated C. qianli from C. chinensis with a divergence of 9.7%. Specimens morphologically recognized as C. chinensis were divided into two sister groups with 2.5% sequence divergence. One group included most of the Taiwanese specimens, and the C. chinensis from China was well situated among them. The other group included several specimens from Dongshi and Heping of Taichung County, and Jianshi of Hsinchu County, Taiwan. The presence of two well-separated C. chinensis lineages suggests that different founder events from neighboring areas might exist in the introduced C. chinensis, and the elucidating species status of the two C. chinensis lineages requires further clarification. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。