Phylogenetic relationships and species delimitation among the taxa with propagula in Pseudotaxipbyllum （Plagiotheciaceae, Bryophyta）  

作　　者：Xiao-Qin Li Qin Zuo Min Li Si He Yu Jia You-Fang Wang 

机构地区：[1]School of Life Sciences, East China Normal University, Shanghai 200241,China [2]Shenzhen Key Laboratory of Southern Subtropical Plant Diversity, Fairylake Botanical Garden, Shenzhen and Chinese Academy of Sciences,Shenzhen 518004, China [3]College of Life Science, Hebei Normal University, Shijiazhuang 050024, China [4]Missouri Botanical Garden, St. Louis MO 63110, USA [5]lnstitute of Botany, The Chinese Academy of Sciences, Beijing 100093, China

出　　处：《Journal of Systematics and Evolution》2015年第2期179-190,共12页植物分类学报（英文版）

基　　金：This research was funded by the National Natural Science Foundation of China （Grant Nos. 31270255 and 31300172）. Thanks are extended to the curators of BM, CANB, DUKE, FH, HSNU, KYO, L, MO, NICH, NY, PC, PE, S, SHNU, SHM, TNS, and ZJFC for the loan of specimens （including type specimens and samples for molecular study）. We are indebted to Dr. Hong- qing Li, Ms. Mei-Liang Yang, Ms. Ping Gui, and Mr. qian Zhang for technical support of the molecular work.

摘　　要：The current circumscription of the eight closely related morphospecies with propagula in Pseudotaxiphyllum Z. Iwats. is extremely unsatisfactory because of the ill-defined delimitation of the species concepts. In order to determine the systematic positions of these closely related species, a phylogenetic reconstruction was carried out based on molecular analyses of two genomic compartments （chloroplast ndhB, rp116, trnG, tmL-F, and nuclear ribosomal interna[ transcribed spacer （nrlTS）） together with a haplotype network analysis and species delimitation assessments by thorough morphological studies. The results of the present study show that P. elegans （Brid.） Z. Iwats. was closely related to P. laetevirens （Dixon ＆ Luisier ex F. Koppe ＆ DCill） Heden^is and both species together with P. maebarae （Sakurai） Z. Iwats. were resolved as monophyletic clades. Pseudotaxiphfllum arqui^olium （Bosch ＆ Sande Lac.） Z. Iwats., P. densum （Cardot） Z. Iwats., P. fauriei （Cardot） Z. Iwats., the Asian populations of P. distichaceum （Mitt.） Z. Iwats. and P. pohliaecarpum （Sull. ＆ Lesq.） Z. Iwats. are morphologically identical. At least three cryptic lineages with undifferentiated morphological or geographical pattern were inferred from this species complex. We propose that the above-mentioned morphospecies be synonymized under P. distichaceum, and the American ＇P. distichaceum＇ be replaced by a new name, P. subfalcatum （Austin） X. Q. Li, Q. Zuo ＆ Y. F. Wang, stat. nov. Pseudotaxiphyllum obtusifolium Z. Iwats. ＆ B. C. Tan was treated as P. distichaceum （Mitt.） Z. Iwats. var. obtusifolium （Z. Iwats. ＆ B. C. Tan） X. q. Li, Q. Zuo ＆ Y. F. Wang, stat. nov.The current circumscription of the eight closely related morphospecies with propagula in Pseudotaxiphyllum Z. Iwats. is extremely unsatisfactory because of the ill-defined delimitation of the species concepts. In order to determine the systematic positions of these closely related species, a phylogenetic reconstruction was carried out based on molecular analyses of two genomic compartments （chloroplast ndhB, rp116, trnG, tmL-F, and nuclear ribosomal interna[ transcribed spacer （nrlTS）） together with a haplotype network analysis and species delimitation assessments by thorough morphological studies. The results of the present study show that P. elegans （Brid.） Z. Iwats. was closely related to P. laetevirens （Dixon ＆ Luisier ex F. Koppe ＆ DCill） Heden^is and both species together with P. maebarae （Sakurai） Z. Iwats. were resolved as monophyletic clades. Pseudotaxiphfllum arqui^olium （Bosch ＆ Sande Lac.） Z. Iwats., P. densum （Cardot） Z. Iwats., P. fauriei （Cardot） Z. Iwats., the Asian populations of P. distichaceum （Mitt.） Z. Iwats. and P. pohliaecarpum （Sull. ＆ Lesq.） Z. Iwats. are morphologically identical. At least three cryptic lineages with undifferentiated morphological or geographical pattern were inferred from this species complex. We propose that the above-mentioned morphospecies be synonymized under P. distichaceum, and the American ＇P. distichaceum＇ be replaced by a new name, P. subfalcatum （Austin） X. Q. Li, Q. Zuo ＆ Y. F. Wang, stat. nov. Pseudotaxiphyllum obtusifolium Z. Iwats. ＆ B. C. Tan was treated as P. distichaceum （Mitt.） Z. Iwats. var. obtusifolium （Z. Iwats. ＆ B. C. Tan） X. q. Li, Q. Zuo ＆ Y. F. Wang, stat. nov.

关 键 词：cryptic speciation molecular phylogeny MOSS P （AB） P （RD） propagula. 

分 类 号：Q16[生物学—普通生物学] S828.2[农业科学—畜牧学]