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標題: | 台灣藪鳥族群遺傳結構 Population genetic structure of Steere’s liocichla (Liocochla steerii) in Taiwan |
作者: | Yi-Wen Peng 彭鉯雯 |
指導教授: | 袁孝維(Hsiao-Wei Yuan) |
關鍵字: | 避難所效應,距離阻隔,微隨體DNA,山脈阻隔,族群遺傳結構,性別差異播遷,鳴唱聲變異,藪鳥, glacial refugium,isolation by distance,microsatellite,mountain range,population genetic structure,sex-biased dispersal,song variation, |
出版年 : | 2006 |
學位: | 碩士 |
摘要: | 藪鳥 (Liocichla steerii),廣泛分佈於海拔約500-3000公尺山區,主要棲息於森林內部到邊緣的底層灌叢間,屬台灣特有種生物。前人研究發現藪鳥公鳥在族群間有明顯的鳴唱聲地理變異而母鳥則無,因此本研究欲探討藪鳥在族群間的遺傳變異情形,進而討論造成族群間遺傳變異的因素以及其與鳴唱聲地理變異之關係。本研究使用六組微隨體基因作為基因標記以研究台灣十五個族群間的藪鳥基因差異程度。結果顯示台灣中西部有四個族群(梅峰、北東眼山、望鄉、南溪林道)呈現基因差異顯著與其他分散在台灣各地的族群有所不同,推測造成此原因是由於台灣山脈阻隔造成族群間基因交流受阻所致。進一步探討台灣中部樣區呈現顯著基因差異與其它樣區的情形,推測是由於冰河時期的避難所效應所造成;而在非冰河時期時,藪鳥族群沿著山勢向高海拔區域擴散。另外,族群間基因差異與地理距離阻隔效應並沒有顯著相關。台灣藪鳥公母鳥間沒有存在性別差異播遷,造成公母鳥間鳴唱之地理變異不同,可能是由於公母鳥在幼鳥時學習鳴唱聲機制不同所致。 Steere’s liocichla (Liocichla steerii) is an endemic avian species of Taiwan, which is widely distributed in forest edge habitat and secondary growth from 500-3000m. Tsai’s research (2005) indicated that the male Steere’s liocichla songs showed geographic differences among populations, while the female answer calls did not. I investigated the population genetic structure of Steere’s liocichla from 15 populations in Taiwan and the correlation between song variance and population genetic structure of Steere’s liocichla. By using six microsatellite loci, the results showed that there were four populations (Meifeng, Beidongyanshan, Wangxiang and Nanxi) which were located in central-west Taiwan had significant pairwise genetic distances from most other study sites. Mountain ranges played a major role as geographic barriers for Steere’s liocichla dispersing among populations. Focus on the pairwise genetic distances in central Taiwan, the results may be due to glacial refugia in central Taiwan during glacial period. After the glacial period, Steere’s liocichla dispersed to highland areas. There were not significant relationships between genetic distances (FST) and geographic distances among populations. There was no significant sex-biased dispersal between sexes. Although there were different geographic song variation between sexes, these may caused by different ability of song learning of male and female fledgling. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/33134 |
全文授權: | 有償授權 |
顯示於系所單位: | 森林環境暨資源學系 |
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