Biogeographic, climatic, morphological, cytological and molecular data reveal a new diploid species from China in the genus Xanthocyparis (Cupressaceae)

IF 3 2区 生物学 Q2 EVOLUTIONARY BIOLOGY
Taxon Pub Date : 2024-09-13 DOI:10.1002/tax.13246
Yu‐Liang Jiang, Jia‐Liang Li, Richard Ian Milne, Khang Sinh Nguyen, Zhi‐Tong Han, Yu‐Song Huang, Wei‐Bin Xu, Yan Liu, Kang‐Shan Mao
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引用次数: 0

Abstract

The genus Xanthocyparis was described in 2002 for a new conifer species X. vietnamensis from northern Vietnam, which became well‐known for its rarity. Recently, natural diploid populations were found in a small area of northern Guangxi, China, whereas material from Vietnam plus newly discovered populations from southern Guangxi were determined to be tetraploids. We integrated evidence from multiple data sources to perform a taxonomic evaluation of the two ploidy levels present in Xanthocyparis. Morphometric analyses detected statistically significant differences in cone and leaf characters, whereas microsatellite and transcriptome analyses revealed clear genetic divergence between diploid and tetraploid material. Furthermore, analysis of bioclimatic variables confirmed divergence in ecological niches. Gene trees from homologous sequences indicate that tetraploid material might have arisen via allopolyploidy from the extant diploid material and a third, possibly extinct lineage. Therefore, we recognize and describe a new diploid species from northern Guangxi China: Xanthocyparis guangxiensis.
生物地理学、气候学、形态学、细胞学和分子数据揭示了中国黄柏属的一个二倍体新种
越南北部的针叶树新种越南黄柏(Xanthocyparis)于 2002 年被描述为黄柏属(Xanthocyparis),因其稀有性而闻名。最近,在中国广西北部的一个小区域发现了天然二倍体种群,而来自越南的材料加上广西南部新发现的种群被确定为四倍体。我们整合了来自多个数据源的证据,对Xanthocyparis中存在的两种倍性水平进行了分类评估。形态计量学分析发现了锥体和叶片特征的显著统计学差异,而微卫星和转录组分析则揭示了二倍体和四倍体材料之间明显的遗传差异。此外,生物气候变量分析证实了生态位的差异。同源序列的基因树表明,四倍体材料可能是通过异源多倍体从现存的二倍体材料和第三个可能已经灭绝的品系中产生的。因此,我们确认并描述了中国广西北部的一个二倍体新物种:Xanthocyparis guangxiensis。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Taxon
Taxon 生物-进化生物学
CiteScore
4.70
自引率
8.80%
发文量
177
审稿时长
6-12 weeks
期刊介绍: TAXON is the bi-monthly journal of the International Association for Plant Taxonomy and is devoted to systematic and evolutionary biology with emphasis on plants and fungi. It is published bimonthly by the International Bureau for Plant Taxonomy and Nomenclature, c/o Institute of Botany, Slovak Academy of Sciences, Dúbravská cesta 9, SK-845 23 Bratislava, SLOVAKIA. Details of page charges are given in the Guidelines for authors. Papers will be reviewed by at least two specialists.
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