摘要
碎米蕨类(cheilanthoid)由于其形态上普遍存在的趋同进化现象,是分类最为困难的类群之一。金毛裸蕨属(Paragymnopteris)虽然仅有5种,但被不同学者分置于若干不同属内,分类地位一直存有争议。该研究基于7个叶绿体基因片段串联数据集、叶绿体基因组及核糖体DNA数据集,探究了金毛裸蕨属与其他碎米蕨类群之间的系统发育关系。结果表明:金毛裸蕨属、旱蕨属(Pellaea)、Astrolepis 3个属具有很近的亲缘关系并共同构成了旱蕨群(pellaeoid group)。金毛裸蕨属的5个物种在系统发育树上形成了2个分支,各自与旱蕨属的成员聚在一起并得到了强烈的支持。基于这一结果,建议对旱蕨属范围重新定义,并将金毛裸蕨属并入旱蕨属中。
The taxonomy of Cheilanthoid ferns is difficult due to morphological convergence, and there areonly five species in Paragymnopteris, the taxonomy of this genus is still controversial with its members assignedto several different genera by different scholars. In this paper, the phylogenetic relationships between Paragymnopteris and other cheilanthoid ferns based on the datasets of seven tandem chloroplast gene segments,the chloroplast genome, and the ribosomal DNA were investigated, respectively. The results showed that thesethree genera formed a well-supported monophyletic clade and constituted the pellaeoid group. The five speciesof Paragymnopteris formed two clades and each clustered with members of Pellaea. Based on the above results,this study suggested that the Pellaea should be redefined and incorporated with the Paragymnopteris into thesame genus.
作者
殷玥
杨文利
胡虹雨
张钢民
YIN Yue;YANG Weni;HU Hongyu;ZHANG Gangmin(College of Ecology and Nature Conservation,Beijing Forestry University,Beijing 100083;College of Landscape Architecture and Tourism,Hebei Agricultural University,Baoding 071000)
出处
《植物研究》
CAS
CSCD
北大核心
2024年第4期491-501,共11页
Bulletin of Botanical Research
基金
国家自然科学基金项目(31270253、31770221)。
