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題名 | 臺灣地區外來種緬甸小鼠的族群遺傳結構與生物地理起源=Genetic Patterns and Biogeographic Origins of the Exotic Rodent (Rattus Exulans) in Taiwan |
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作者 | 儲瑞華; 曹又仁; 莊媛茹; 陳皇奇; 林曜松; 吳海音; | 書刊名 | 特有生物研究 |
卷期 | 9:1 2007.01[民96.01] |
頁次 | 頁1-11 |
分類號 | 389.87 |
關鍵詞 | 緬甸小鼠; 外來種; 粒線體DNA控制區域; Rattus exulans; SSCP; Exotic species; mtDNA control region; |
語文 | 中文(Chinese) |
中文摘要 | 本研究利用SSCP (single-strand conformation polymorphism) 技術,分析近年發現入侵台灣之外來種緬甸小鼠(Rattus exulans)粒線體DNA 單倍體基因型(haplotype) 的多型性,探尋其可能來源,並檢視各基因型在花蓮縣吉安鄉的分布狀況,以推論此外來種族群的擴散模式。在粒線體DNA控制區(mtDNAcontrolregion) 中,以SSCP共判別出4 種單倍體基因型(TypeI-IV) ,其中Type I 和II 占大多數,且分布最廣;Type III 和IV 則較少,皆僅見於單一捕捉點。經與NCBI 資料庫中的序列比對,發現Type I 與分布於泰國的序列相同,而Type IV 則與蘇拉維西的序列相近,推測入侵台灣的緬甸小鼠來自東南亞大陸及週邊島嶼區域,而由各基因型間的遺傳變異程度判斷,緬甸小鼠可能至少有2 次以上的入侵史。 |
英文摘要 | MitochondriaDNA(mtDNA)haplotypeswereidentifiedwithsingle-strandconformationpolymorphism (SSCP) for the exotic rodent (Rattus exulans) found in Jian Township, Hualien County, Taiwan. The objectives of this study were to examine distribution patterns of the haplotypes and to determine biogeographical origins of this exotic rat. We found four distinct SSCP haplotypes, Types I, II, III and IV, in a segment of 372 base-pairs in the mtDNA control region. Types I and II were dominant and occurred widely in the sampling area, while Types III and IV were restricted, each to a single sampling location. When the sequences of the four haplotypes obtained in this study were compared with the sequences of 32 R. exulans haplotypes available in NCBI, Type I was identical to the sequence from Thailand, Type IV differed to one sequence from Sulawesi by only one base pair. The results indicated thatthisspeciesofexoticratinHualienmightbeoriginatedfromtheSoutheastAsiamainlandandMalay Archipelago. The presence of four haplotypes suggested that there were at least two invasion events. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。