{"title":"Dryopteris×subdiffracta (Dryopteridaceae), a new natural hybrid fern from Guangxi, China.","authors":"Hong-Jin Wei, Zheng-Yu Zuo","doi":"10.3897/phytokeys.250.119803","DOIUrl":null,"url":null,"abstract":"<p><p>A new natural hybrid fern, Dryopteris×subdiffracta (Dryopteridaceae), is reported from Guangxi, China. Molecular phylogenetic analysis based on DNA sequences from the low-copy nuclear marker <i>Ak1</i> and plastid genome revealed respectively that <i>D.polita</i> and <i>D.diffracta</i> are parents of the new hybrid, with <i>D.polita</i> as the maternal parent. Cytometric analysis of the nuclear DNA content indicated that <i>D.×subdiffracta</i> might be a diploid hybrid. Morphologically, <i>D.×subdiffracta</i> shares a high degree of similarity with <i>D.×subreflexipinna</i> from Taiwan, especially in zigzag-shaped rachis and deflexed pinna stalks. However, <i>D.×subdiffracta</i> is distinguishable in the degree of lamina division and shapes of lamina and pinnulets. A comprehensive taxonomic description accompanied by line drawings are provided.</p>","PeriodicalId":20070,"journal":{"name":"PhytoKeys","volume":"250 ","pages":"7-19"},"PeriodicalIF":1.3000,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11669906/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"PhytoKeys","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.3897/phytokeys.250.119803","RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/1/1 0:00:00","PubModel":"eCollection","JCR":"Q3","JCRName":"PLANT SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
A new natural hybrid fern, Dryopteris×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.×subdiffracta might be a diploid hybrid. Morphologically, D.×subdiffracta shares a high degree of similarity with D.×subreflexipinna from Taiwan, especially in zigzag-shaped rachis and deflexed pinna stalks. However, D.×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.
期刊介绍：
PhytoKeys is a peer-reviewed, open-access, online and print, rapidly produced journal launched to support free exchange of ideas and information in systematic botany.
All papers published in PhytoKeys can be freely copied, downloaded, printed and distributed at no charge for the reader. Authors are thus encouraged to post the pdf files of published papers on their homepages or elsewhere to expedite distribution. There is no charge for color.
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