摘要：
蹄蓋蕨類屬於鱗毛蕨科，蹄蓋蕨亞科之植物，全世界約有七百種，廣泛分布於熱帶及溫帶地區；台灣約有五十種，分布範圍由平地至海拔3000公尺區域。蹄蓋蕨類屬間之親緣關係及屬階範圍界線，仍有許多不同爭議。本研究利用葉綠體中trnL-trnF spacer序列，藉由35個物種分析結果，探討蹄蓋蕨類屬間之親緣關係及推衍蹄蓋蕨類可能之演化地位。
藉由鄰接法與最大簡約法所構成之親緣關係樹，獲得相似的分群模式，結果顯示：蹄蓋蕨屬與貞蕨屬分為同一分支群，故推測貞蕨屬之親緣關係與蹄蓋蕨屬較為接近，而非雙蓋蕨屬；雙蓋蕨屬與過溝菜蕨屬形成另一個分支群，表示過溝菜蕨屬應隸屬於雙蓋蕨屬中；結果支持安蕨屬由蹄蓋蕨屬中獨立，與日本蹄蓋蕨屬於同一分支群；Deparia之分支群包含假蹄蓋蕨屬、亞蹄蓋蕨屬、假鱗毛蕨屬、假腸蕨屬、單葉雙蓋蕨及球子蕨屬。以上四個分支群構成蹄蓋蕨類植物主要之核心部分，且與岩蕨屬及金星蕨科具有相同起源。冷蕨屬及羽節蕨屬之親緣位階介於金星蕨科與鱗毛蕨科之間；而軸果蕨屬並非與蹄蓋蕨屬及雙蓋蕨屬的關係接近；腫足蕨屬與鱗毛蕨類同為一群，與蹄蓋蕨類之親緣關係較遠，故推測腫足蕨屬可能不屬於蹄蓋蕨類中。
基於以上證據可知，蹄蓋蕨類植物之親緣關係與金星蕨類十分接近，藉此推論，蹄蓋蕨類之分類位階應置於包含金星蕨科之廣義的岩蕨科中，並非先前所認為之鱗毛蕨科，而冷蕨屬與羽節蕨屬則為此岩蕨科最基部的分支，蹄蓋蕨類中主要之四個單起源群可能為岩蕨科中之一個單起源族或亞科。

Abstract：
Athyrioid ferns（Athyrioideae, Dryopteridaceae）consist of about 700 species with a distribution range from tropical to temperate zone in the world. In Taiwan, the subfamily includes 50 species commonly found from lowland to around 3000 meters in elevation. Phylogenetic relationships and the generic circumscription of athyrioid genera are confused and controversial. In this study, trnL-trnF spacer, which is a nucleotide sequence between genes in the chloroplast, was used to analyze and infer the phylogenetic relationships and evolutionary status of 35 species.
Phylogenetic trees produced by neighbor-joining and maximum-parsimony methods are similar in topology. Athyrium and Cornopteris form a clade, and this indicates Cornopteris is more closely related to Athyrium than to Diplazium. Anisogonium nests within Diplazium clade, and it implies these two genera congeneric. Anisocampium is distinct from Athyrium sensu stricto and forms a clade with Athyrium nipponicum. Deparia clade includes Athyriopsis, Lunathyrium, Dryoathyrium, Dictyodroma, Diplazium subsinuatum and Matteuccia. These four clades may be seen as the core part of athyrioid ferns. Woodsia and Thelypteridaceae cluster next to these four clades. Cystopteris and Gymnocarpium occupy a position between Thelypteridaceae and Dryopteridaceae. Rhachidosorus is neither closely related to Athyrium nor Diplazium. Hypodematium is distantly related to athyrioid ferns and forms a clade with Dryopteridaceae. Therefore, Hypodematium may be isolated from athyrioid ferns.
Based on the evidences mentioned above, athyrioid ferns are suggested to be closely related to Thelypteriaceae, and are probably members of Woodsiaceae（including Thelypteridaceae）instead of Dryopteridaceae. In addition, Cystopteris and Gymnocarpium are the most basal lineage of Woodsiaceae sensu lato. The core group of athyrioid ferns probably better treated as a monophyletic tribe or subfamily of Woodsiaceae at current stage.

目 錄


摘要………………………………………………………………….….Ⅰ
Abstract………………………………………………………………….Ⅱ
目錄…….……………………………………………………………….Ⅳ
圖表目次………………………………………………………………..Ⅴ
前言………………………………………………………………………1
前人研究…………………………………………………………………3
實驗材料及方法…………………………………………………………6
結果………………………………………………………………………9
討論……………………………………………………………………..10
引用文獻………………………………………………………………..18

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