摘要
Although it is an uncommon distribution in seed plants, many bryophytes occur around the Pacific Rim of north-western North America and eastern Asia. This work focuses on a clade of peatmosses (Sphagnum) that is distributed around the Pacific Rim region, with some individual species found across the total range. The goals were to infer divergent phylogenetic relationships among haploid species in the clade, assess parentage of allopolyploid taxa, and evaluate alternative hypotheses about inter- and intraspecific geographical range evolution. Multiple data sets and analyses resolved an ‘Alaska’ clade, distributed across western North America, eastern China and Japan, and an ‘Asia’ clade that includes western Chinese, Thai, Korean, eastern Chinese and Japanese lineages. Allopolyploids have arisen at least four times in the Pacific Rim clade of Sphagnum subgen. Subsecunda; it appears that all allopolyploid origins involved closely related haploid parental taxa. Biogeographical inferences were impacted by topological uncertainty and especially by the biogeographical model utilized to reconstruct ancestral areas. Most analyses converge on the conclusion that the ancestor to this clade of Pacific Rim Sphagnum species was widespread from Alaska south to eastern Asia, but a northern origin for the Alaska subclade was supported by one of the two biogeographical models we employed, under which it was robust to phylogenetic uncertainty. .overlined { text-decoration: overline; } .struck { text-decoration:line-through; } .underlined { text-decoration:underline; } .doubleUnderlined { text-decoration:underline;border-bottom:1px solid #000; } View Full Article with Supporting Information (HTML) Enhanced Article (HTML) Get PDF (472K)Get PDF (472K) More content like thisFind more content: like this articleFind more content written by: A. Jonathan Shaw Blanka Shaw Matthew G. Johnson Nicolas Devos Hans K. Stenøien Kjell I. Flatberg Benjamin E. Carter All Authors
摘要译文
虽然这是在种子植物一种罕见的分布，围绕西北部北美和亚洲东部的太平洋沿岸地区发生的许多苔藓植物这项工作的重点是围绕环太平洋地区分布peatmosses（泥炭藓）的一个分支，与整个总范围发现了一些个别品种该目标是推断进化枝单倍体物种间的分歧亲缘关系，评估异源多倍体类群出身，和评估有关间和种内的地理范围evolutionMultiple数据集替代的假设和分析解决的鈥楢LASKA鈥分支，横跨北美西部分布，中国东部和日本，包括中国西部，泰国，韩国，中国东部和日本血统的鈥楢SIA鈥分支异源多倍体已经出现在泥炭藓subgenSubsecunda的太平洋沿岸地区分支至少四次;似乎所有的异源多倍体的起源参与密切相关的单倍体亲本类群生物地理的推论是由拓扑不确定性，特别是用于重建祠堂地区生物地理模型的影响大多数分析收敛的结论是祖先给这个分支太平洋沿岸泥炭藓物种是从阿拉斯加南部普遍向亚洲东部，但对于阿拉斯加subclade北方起源是由我们采用两种生物地理的车型之一，其下是坚固的系统发育不确定性支撑上划线{文字修饰：上划线; }竤卡车{文字装饰：线通过; }竨nderlined {文本装饰：下划线; }竏oubleUnderlined {文本装饰：下划线;下边框：1px的固体＃000;查看全文与支持信息（HTML）增强文章（HTML）获取PDF（472K）获取PDF（472K），如thisFind更多内容更多内容：类似这样的articleFind更多的内容写的：一乔纳森·肖布兰卡肖马修GJohnson尼古拉斯·狄维士汉斯KSten酶IEN谢尔IFlatberg本杰明ECarter所有的著者
A. Jonathan Shaw[1,*]; Blanka Shaw[1]; Matthew G. Johnson[1,† Nicolas Devos[1]; Hans K. Stenøien[2]; Kjell I. Flatberg[2] and Benjamin E. Carter[1];. Phylogenetic structure and biogeography of the Pacific Rim clade of Sphagnum subgen. Subsecunda: haploid and allodiploid taxa[J]. Biological Journal of the Linnean Society, 2015,116(2): 295-311