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| 1 | A framework infrageneric classification of Carex (Cyperaceae) and its organizing principles显示文摘Phylogenetic studies of Carex L.(Cyperaceae)have consistently demonstrated that most subgenera and sections are para-or polyphyletic.Yet,taxonomists continue to use subgenera and sections in Carex classification.Why?The Global Carex Group(GCG)here takes the position that the historical and continued use of subgenera and sections serves to(i)organize our understanding of lineages in Carex,(ii)create an identification mechanism to break the~2000 species of Carex into manageable groups and stimulate its study,and(iii)provide a framework to recognize morphologically diagnosable lineages within Carex.Unfortunately,the current understanding of phylogenetic relationships in Carex is not yet sufficient for a global reclassification of the genus within a Linnean infrageneric(sectional)framework.Rather than leaving Carex classification in its current state,which is misleading and confusing,we here take the intermediate steps of implementing the recently revised subgeneric classification and using a combination of informally named clades and formally named sections to reflect the current state of our knowledge.This hybrid classification framework is presented in an order corresponding to a linear arrangement of the clades on a ladderized phylogeny,largely based on the recent phylogenies published by the GCG.It organizes Carex into six subgenera,which are,in turn,subdivided into 62 formally named Linnean sections plus 49 informal groups.This framework will serve as a roadmap for research on Carex phylogeny,enabling further development of a complete reclassification by presenting relevant morphological and geographical information on clades where possible and standardizing the use of formal sectional names. | Eric H.Roalson Pedro Jiménez-Mejías Andrew L.Hipp Carmen Benítez-Benítez Leo P.Bruederle Kyong-Sook Chung Marcial Escudero Bruce A.Ford Kerry Ford Sebastian Gebauer Berit Gehrke Marlene Hahn Muhammad Qasim Hayat Mathias H.Hoffmann Xiao-Feng Jin Sangtae Kim Isabel Larridon Étienne Léveillé-Bourret Yi-Fei Lu Modesto Luceño Enrique Maguilla Jose IgnacioMárquez-Corro Santiago Martín-Bravo Tomomi Masaki Mónica Míguez Robert F.C.Naczi Anton A.Reznicek Daniel Spalink Julian R.Starr Uzma Tamara Villaverde Marcia J.Waterway Karen L.Wilson and Shu-Ren Zhang | 2021 | Journal of Systematics and Evolution2021，59，4： | 3 |
| 2 | Macroevolutionary insights into sedges (Carex: Cyperaceae): The effects of rapid chromosome number evolution on lineage diversification显示文摘Changes in holocentric chromosome number due to fission and fusion have direct and immediate effects on genome structure and recombination rates.These,in turn,may influence ecology and evolutionary trajectories profoundly.Sedges of the genus Carex(Cyperaceae)comprise ca.2000 species with holocentric chromosomes.The genus exhibits a phenomenal range in the chromosome number(2n=10−132)with almost not polyploidy.In this study,we integrated the most comprehensive cytogenetic and phylogenetic data for sedges with associated climatic and morphological data to investigate the hypothesis that high recombination rates are selected when evolutionary innovation is required,using chromosome number evolution as a proxy for recombination rate.We evaluated Ornstein-Uhlenbeck models to infer shifts in chromosome number equilibrium and selective regime.We also tested the relationship between chromosome number and diversification rates.Our analyses demonstrate significant correlations between morphology and climatic niche and chromosome number in Carex.Nevertheless,the amount of chromosomal variation that we are able to explain is very small.We recognized a large number of shifts in mean chromosome number,but a significantly lower number in climatic niche and morphology.We also detected a peak in diversification rates near intermediate recombination rates.In combination,these analyses point toward the importance of chromosome evolution to the evolutionary history of Carex.Our work suggests that the effect of chromosome evolution on recombination rates,not just on reproductive isolation,may be central to the evolutionary history of sedges. | José I.Márquez-Corro Santiago Martín-Bravo Pedro Jiménez-Mejías Andrew L.Hipp Daniel Spalink Robert F.C.Naczi Eric H.Roalson Modesto Luceño Marcial Escudero | 2021 | Journal of Systematics and Evolution2021，59，4： | 1 |
| 3 | A new classification of Cyperaceae (Poales) supported by phylogenomic data显示文摘Cyperaceae(sedges)are the third largest monocot family and are of considerable economic and ecological importance.Sedges represent an ideal model family to study evolutionary biology due to their species richness,global distribution,large discrepancies in lineage diversity,broad range of ecological preferences,and adaptations including multiple origins of C4 photosynthesis and holocentric chromosomes.Goetghebeur′s seminal work on Cyperaceae published in 1998 provided the most recent complete classification at tribal and generic level,based on a morphological study of Cyperaceae inflorescence,spikelet,flower,and embryo characters,plus anatomical and other information.Since then,several family-level molecular phylogenetic studies using Sanger sequence data have been published.Here,more than 20 years after the last comprehensive classification of the family,we present the first family-wide phylogenomic study of Cyperaceae based on targeted sequencing using the Angiosperms353 probe kit sampling 311 accessions.In addition,62 accessions available from GenBank were mined for overlapping reads and included in the phylogenomic analyses.Informed by this backbone phylogeny,a new classification for the family at the tribal,subtribal,and generic levels is proposed.The majority of previously recognized suprageneric groups are supported,and for the first time,we establish support for tribe Cryptangieae as a clade including the genus Koyamaea.We provide a taxonomic treatment including identification keys and diagnoses for the 2 subfamilies,24 tribes,and 10 subtribes,and basic information on the 95 genera.The classification includes five new subtribes in tribe Schoeneae:Anthelepidinae,Caustiinae,Gymnoschoeninae,Lepidospermatinae,and Oreobolinae. | Isabel Larridon Alexandre R.Zuntini Étienne Léveillé-Bourret Russell L.Barrett Julian R.Starr AMuthama Muasya Tamara Villaverde Kenneth Bauters Grace E.Brewer Jeremy J.Bruhl Suzana M.Costa Tammy L.Elliott Niroshini Epitawalage Marcial Escudero Isabel Fairlie Paul Goetghebeur Andrew LHipp Pedro Jiménez-Mejías Izai ABSabino Kikuchi Modesto Luceño JoséIgnacio Márquez-Corro Santiago Martín-Bravo Olivier Maurin Lisa Pokorny Eric HRoalson Ilias Semmouri David A.Simpson Daniel Spalink WWayt Thomas Karen L.Wilson Martin Xanthos Félix Forest William J.Baker | 2021 | Journal of Systematics and Evolution2021，59，4： | 1 |
| 4 | Detidingshipboard ADCP data in eastern boundary current显示文摘 | HERIBERTO J V JOSE G-V MODESTO O 2010 | 2010 | Journalof Atmospheric and Oceanic Technology2010，28，： | 1 |
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