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題名 | High Genetic Diversity and Low Genetic Differentiation in the Relict Tree Fern Sphaeropteris Brunoniana (Cyatheaceae) Revealed by Amplified Fragment Length Polymorphism (AFLP)=基於AFLP分子標記的白桫欏遺傳多樣性分析 |
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作者 | 王紫娟; 管開雲; Wang, Zi-juan; Guan, Kai-yun; |
期刊 | Botanical Studies |
出版日期 | 20110700 |
卷期 | 52:3 2011.07[民100.07] |
頁次 | 頁231-238 |
分類號 | 378.13 |
語文 | eng |
關鍵詞 | 保護策略; 遺傳分化; 遺傳多樣性; 白桫欏; AFLP; Conservation strategy; Genetic differentiation; Genetic diversity; Sphaeropteris brunoniana; |
中文摘要 | 本文利用AFLP分子標記,對採自中國和老撾的10個白桫欏居群共132個個體進行了PCR擴增,2對選擇性擴增引物共產生234條指紋清晰的可讀條帶,其中221條(94.4%)為多態性條帶。分析結果表明,白桫欏具有較高的遺傳多樣性 (Ht= 0.333, Hsp= 0.499)以及較低的居群間遺傳分化(Gst= 0.16, φST= 0.12 and (Hsp-Hpop)/Hsp= 0.16),這可能與它特殊的生活特性,進化歷史以及基因流有關。非加權平均法聚類分析(UPGMA)揭示這10個取樣居群可分為雲南以及海南- 老撾兩個不同的遺傳組,Mantel test顯示這與它們的地理距離有關;此外,這也可能與它們不同的種質來源有關。另外,根據研究的結果我們討論了該物種的保護策略。 |
英文摘要 | Amplified fragment length polymorphism (AFLP) was employed to analyze the population genetics of relict tree fern Sphaeropteris brunoniana. A total of 132 individuals from ten natural populations in China and Laos were collected for this study. Using two selective primers, 234 reliable bands were generated, of which 221 (94.4%) were polymorphic. Genetic analysis indicated an unexpectedly high level of genetic diversity in S. brunoniana (Ht= 0.333, Hsp= 0.499), but a low level of genetic differentiation among populations (Gst= 0.16, φST= 0.12 and (Hsp-Hpop)/Hsp= 0.16). This result may be due to its life traits, evolutionary history and gene flow. Two major genetic groups, one from Yunnan and the other from Hainan-Laos, were detected among the ten investigated populations. The Mantel test correlated this differentiation with geographic distance. However, the different population origins may also have an effect on this differentiation. Based on these findings, implications for conservation strategies of this species in China are discussed. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。