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A well-supported nuclear phylogeny of Poaceae and implications for the evolution of C4 photosynthesis

Molecular Plant 2022年第4期15卷 755-777页

作者： Weichen Huang Lin Zhang JTravis Columbus Yi Hu Yiyong Zhao Lin Tang Zhenhua Guo Wenli Chen michael mckain Madelaine Bartlett Chien-Hsun Huang De-Zhu Li Song Ge Hong Ma Department of Biology 510 Mueller LaboratoryHuck Institutes of the Life SciencesThe Pennsylvania State UniversityUniversity ParkState CollegePA 16802USA Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering and State Key Laboratory of Genetic Engineering Institute of Biodiversity Sciences and Institute of Plant BiologySchool of Life SciencesFudan University2005 Songhu RoadShanghai 200438China Rancho Santa Ana Botanic Garden and Claremont Graduate University 1500 North College AvenueClaremontCA 91711USA College of Life Sciences Zhejiang UniversityHangzhouZhejiang 310058China Plant Germplasm and Genomics Center Germplasm Bank of Wild SpeciesKunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201 China State Key Laboratory of Systematic and Evolutionary Botany Institute of BotanyChinese Academy of SciencesBeijing 100093China Department of Biological Sciences University of Alabama411 Mary Harmon Bryant HallTuscaloosaAL 35487USA Biology Department University of Massachusetts Amherst611 North Pleasant Street221 Morrill 3AmherstMA 01003 USA

Poaceae(the grasses)includes rice,maize,wheat,and other crops,and is the most economically important angiosperm *** is also one of the largest plant families,consisting of over 11000 species with a global distribution that contributes to diverse *** species are classified into 12 subfamilies,with generally strong phylogenetic support for their ***,many relationships within subfamilies,among tribes and/or subtribes,remain *** better resolve the Poaceae phylogeny,we generated 342 transcriptomic and seven genomic datasets;these were combined with other genomic and transcriptomic datasets to provide sequences for 357 Poaceae species in 231 genera,representing 45 tribes and all 12 *** 1200 low-copy nuclear genes were retrieved from these datasets,with several subsets obtained using additional criteria,and used for coalescent analyses to reconstruct a Poaceae *** results strongly support the monophyly of 11 subfamilies;however,the subfamily Puelioideae was separated into two non-sister clades,one for each of the two previously defined tribes,supporting a hypothesis that places each tribe in a separate *** clock analyses estimated the crown age of Poaceae to be101 million years *** character reconstruction of C3/C4 photosynthesis supports the hypothesis of multiple independent origins of C4 *** origins are further supported by phylogenetic analysis of the ppc gene family that encodes the phosphoenolpyruvate carboxylase,which suggests that members of three paralogous subclades(ppc-aL1a,ppc-aL1b,and ppcB2)were recruited as functional C4 ppc *** study provides valuable resources and a robust phylogenetic framework for evolutionary analyses of the grass family.

关键词： Gramineae transcriptome nuclear phylogeny molecular clock C4 photosynthesis ppc gene evolution

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