Dryopteris x subdiffracta (Dryopteridaceae), a new natural hybrid fern from Guangxi, China

被引：0

作者：

Wei, Hong-Jin ^{[1
]}

Zuo, Zheng-Yu ^{[2
]}

机构：

[1] Eastern China Conservat Ctr Wild Endangered Plant, Shanghai Chenshan Bot Garden, Shanghai 201602, Peoples R China

[2] Chinese Acad Sci, Germplasm Bank Wild Species, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China

来源：

PHYTOKEYS | 2024年 / 250期

关键词：

Dryopteris sect. Acrorumohra; hybridization; molecular phylogeny; nuclear gene AK1; plastome; COMPLEX DRYOPTERIDACEAE; HYBRIDIZATION;

D O I：

10.3897/phytokeys.250.119803

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

A new natural hybrid fern, Dryopteris x subdiffracta (Dryopteridaceae), is reported from Guangxi, China. Molecular phylogenetic analysis based on DNA sequences from the low-copy nuclear marker Ak1 and plastid genome revealed respectively that D. polita and D. diffracta are parents of the new hybrid, with D. polita as the maternal parent. Cytometric analysis of the nuclear DNA content indicated that D. x subdiffracta might be a diploid hybrid. Morphologically, D. x subdiffracta shares a high degree of similarity with D. x subreflexipinna from Taiwan, especially in zigzag-shaped rachis and deflexed pinna stalks. However, D. x subdiffracta is distinguishable in the degree of lamina division and shapes of lamina and pinnulets. A comprehensive taxonomic description accompanied by line drawings are provided.

引用

页码：7 / 19

页数：13

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