{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,3]],"date-time":"2026-09-03T07:15:58Z","timestamp":1788419758343,"version":"build-2803163510"},"reference-count":97,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,9,3]],"date-time":"2026-09-03T00:00:00Z","timestamp":1788393600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Plant Sci."],"abstract":"<jats:p>\n                    Resolving the evolutionary relationships and generic boundaries of\n                    <jats:italic>Citrus<\/jats:italic>\n                    sensu lato (s.l.) remains a major challenge in plant systematics, largely because complex reticulate evolution and insufficient sampling of wild lineages have obscured the recognition of independent evolutionary entities. Here, we describe\n                    <jats:italic>Hongdaicitrus<\/jats:italic>\n                    gen. nov. and\n                    <jats:italic>Hongdaicitrus xiangtoushanensis<\/jats:italic>\n                    sp. nov., a new genus and species within\n                    <jats:italic>Citrus<\/jats:italic>\n                    s.l., from Guangdong Province, southern China. The new genus is characterized by imbricate petals that remain semi-closed, campanulate to tubular, and incompletely expanded at anthesis; 19\u201320 stamens arranged in three whorls, with distinctly unequal filaments connate into five fascicles; a 5-loculed ovary, short terete style, and conical stigma; and absent or highly reduced juice vesicles. Pollen micromorphological observations further support its distinctiveness, showing four relatively shallow germination sulci and densely perforate to finely foveolate exine ornamentation with small and relatively uniform lumina. Phylogenomic analyses based on 83 plastid protein-coding sequences and 5, 873 single-copy nuclear genes consistently recovered\n                    <jats:italic>Hongdaicitrus<\/jats:italic>\n                    as a deeply divergent lineage sister to\n                    <jats:italic>Fortunella<\/jats:italic>\n                    and clearly separated from\n                    <jats:italic>Citrus<\/jats:italic>\n                    s.s. Genome-wide resequencing analyses further showed that\n                    <jats:italic>Hongdaicitrus<\/jats:italic>\n                    forms a distinct genetic cluster and is clearly differentiated from\n                    <jats:italic>Fortunella<\/jats:italic>\n                    ,\n                    <jats:italic>Citrus<\/jats:italic>\n                    s.s.,\n                    <jats:italic>Papeda<\/jats:italic>\n                    ,\n                    <jats:italic>Poncirus<\/jats:italic>\n                    , and other citrus relatives. Ecologically,\n                    <jats:italic>Hongdaicitrus<\/jats:italic>\n                    is endemic to rock crevices of exposed granite outcrops with extremely barren soils. Based on the IUCN Red List criteria,\n                    <jats:italic>Hongdaicitrus xiangtoushanensis<\/jats:italic>\n                    is provisionally assessed as Critically Endangered (CR). Our integrative evidence supports the recognition of\n                    <jats:italic>Hongdaicitrus<\/jats:italic>\n                    as a distinct genus, provides new insights into generic delimitation, systematics, and biogeographic diversification among\n                    <jats:italic>Citrus<\/jats:italic>\n                    s.l.\n                  <\/jats:p>","DOI":"10.3389\/fpls.2026.1905317","type":"journal-article","created":{"date-parts":[[2026,9,3]],"date-time":"2026-09-03T06:40:13Z","timestamp":1788417613000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Integrative morphological, palynological, and phylogenomic evidence supports the recognition of Hongdaicitrus as a new genus within Citrus sensu lato"],"prefix":"10.3389","volume":"17","author":[{"given":"Yarong","family":"Wang","sequence":"first","affiliation":[{"name":"State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Stress Biology, School of Life Sciences, Sun Yat-sen University","place":["Guangzhou, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ning","family":"Kang","sequence":"additional","affiliation":[{"name":"Guangdong Xiangtoushan National Nature Reserve Administration","place":["Huizhou, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhiyi","family":"Xie","sequence":"additional","affiliation":[{"name":"Guangdong Ecological and Environmental Monitoring Center","place":["Guangzhou, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Caiqin","family":"Liu","sequence":"additional","affiliation":[{"name":"Guangdong Xiangtoushan National Nature Reserve Administration","place":["Huizhou, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yue","family":"Zhang","sequence":"additional","affiliation":[{"name":"Guangdong Xiangtoushan National Nature Reserve Administration","place":["Huizhou, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wanyi","family":"Zhao","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Stress Biology, School of Life Sciences, Sun Yat-sen University","place":["Guangzhou, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qiang","family":"Fan","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Stress Biology, School of Life Sciences, Sun Yat-sen University","place":["Guangzhou, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wenbo","family":"Liao","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Stress Biology, School of Life Sciences, Sun Yat-sen University","place":["Guangzhou, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2026,9,3]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"233","DOI":"10.1016\/j.scienta.2004.01.003","article-title":"Phylogenetic relationships in the \u201ctrue citrus fruit trees\u201d revealed by PCR-RFLP analysis of cpDNA","volume":"102","author":"Abkenar","year":"2004","journal-title":"Sci. Hortic. (Amsterdam)."},{"key":"B2","doi-asserted-by":"publisher","DOI":"10.1016\/j.heliyon.2024.e39430","article-title":"Phylogenomic insights into Neotropical Magnolia relationships","volume":"10","author":"Aldaba N\u00fa\u00f1ez","year":"2024","journal-title":"Heliyon"},{"key":"B3","doi-asserted-by":"publisher","first-page":"166","DOI":"10.1134\/S1062360407030022","article-title":"Phenomenon of polyembryony. Genetic heterogeneity of seeds","volume":"38","author":"Batygina","year":"2007","journal-title":"Ontogenez"},{"key":"B4","doi-asserted-by":"publisher","first-page":"668","DOI":"10.3732\/ajb.0800341","article-title":"A molecular phylogeny of the orange subfamily (Rutaceae: Aurantioideae) using nine cpDNA sequences","volume":"96","author":"Bayer","year":"2009","journal-title":"Am. J. Bot."},{"key":"B5","doi-asserted-by":"publisher","first-page":"588","DOI":"10.1016\/j.oregeorev.2017.12.010","article-title":"The genesis of granite-related hydrothermal uranium deposits in the Xiazhuang and Zhuguang ore fields, North Guangdong Province, SE China: Insights from mineralogical, trace elements and U-Pb isotopes signatures of the U mineralisation","volume":"92","author":"Bonnetti","year":"2018","journal-title":"Ore Geol. Rev."},{"key":"B6","doi-asserted-by":"publisher","first-page":"1","DOI":"10.11646\/phytotaxa.540.1.1","article-title":"A revised phylogenetic classification of tribe Phyllantheae (Phyllanthaceae)","volume":"540","author":"Bouman","year":"2022","journal-title":"Phytotaxa"},{"key":"B7","doi-asserted-by":"publisher","first-page":"72","DOI":"10.1002\/tax.12424","article-title":"Molecular phylogenetics of Phyllanthus sensu lato (Phyllanthaceae): Towards coherent monophyletic taxa","volume":"70","author":"Bouman","year":"2021","journal-title":"Taxon."},{"key":"B8","doi-asserted-by":"publisher","first-page":"2015","DOI":"10.1093\/molbev\/msv082","article-title":"A phylogenetic analysis of 34 chloroplast genomes elucidates the relationships between wild and domestic species within the genus Citrus","volume":"32","author":"Carbonell-Caballero","year":"2015","journal-title":"Mol. Biol. Evol."},{"key":"B9","doi-asserted-by":"publisher","first-page":"540","DOI":"10.1093\/oxfordjournals.molbev.a026334","article-title":"Selection of conserved blocks from multiple alignments for their use in phylogenetic analysis","volume":"17","author":"Castresana","year":"2000","journal-title":"Mol. Biol. Evol."},{"key":"B10","doi-asserted-by":"publisher","first-page":"1","DOI":"10.3897\/phytokeys.125.34877","article-title":"The Callerya Group redefined and Tribe Wisterieae (Fabaceae) emended based on morphology and data from nuclear and chloroplast DNA sequences","volume":"125","author":"Compton","year":"2019","journal-title":"PhytoKeys"},{"key":"B11","doi-asserted-by":"publisher","first-page":"291","DOI":"10.1093\/molbev\/msz189","article-title":"ModelTest-NG: A new and scalable tool for the selection of DNA and protein evolutionary models","volume":"37","author":"Darriba","year":"2020","journal-title":"Mol. Biol. Evol."},{"key":"B12","doi-asserted-by":"publisher","first-page":"332","DOI":"10.1016\/j.tree.2009.01.009","article-title":"Gene tree discordance, phylogenetic inference and the multispecies coalescent","volume":"24","author":"Degnan","year":"2009","journal-title":"Trends Ecol. Evol."},{"key":"B13","volume-title":"Citrus Varieties in China","author":"Deng","year":"2008"},{"key":"B14","doi-asserted-by":"crossref","first-page":"283","DOI":"10.1007\/978-3-642-83962-7_18","article-title":"DNA protocols for plants BT - Molecular techniques in taxonomy","volume-title":"Molecular Techniques in Taxonomy","author":"Doyle","year":"1991"},{"key":"B15","doi-asserted-by":"publisher","first-page":"528","DOI":"10.1080\/11263500902722964","article-title":"Plant species delimitation: A comparison of morphological and molecular markers","volume":"143","author":"Duminil","year":"2009","journal-title":"Plant Biosyst."},{"key":"B16","doi-asserted-by":"publisher","first-page":"157","DOI":"10.1186\/s13059-015-0721-2","article-title":"OrthoFinder: Solving fundamental biases in whole genome comparisons dramatically improves orthogroup inference accuracy","volume":"16","author":"Emms","year":"2015","journal-title":"Genome Biol."},{"key":"B17","doi-asserted-by":"publisher","first-page":"238","DOI":"10.1186\/s13059-019-1832-y","article-title":"OrthoFinder: Phylogenetic orthology inference for comparative genomics","volume":"20","author":"Emms","year":"2019","journal-title":"Genome Biol."},{"key":"B18","doi-asserted-by":"publisher","first-page":"653","DOI":"10.1007\/s11105-018-1111-1","article-title":"Development of species-specific InDel markers in citrus","volume":"36","author":"Fang","year":"2018","journal-title":"Plant Mol. Biol. Rep."},{"key":"B19","doi-asserted-by":"crossref","DOI":"10.1007\/978-3-031-25775-9","volume-title":"The Citron Compendium: The Citron (Etrog) Citrus Medica L.: Science and Tradition","author":"Goldschmidt","year":"2023"},{"key":"B20","doi-asserted-by":"publisher","first-page":"1415","DOI":"10.1111\/jse.70002","article-title":"Biogeography, evolution, and ecology of oranges and their relatives (Rutaceae: Aurantioideae)","volume":"63","author":"Heads","year":"2025","journal-title":"J. Syst. Evol."},{"key":"B21","doi-asserted-by":"publisher","first-page":"1964","DOI":"10.1038\/s41588-023-01516-6","article-title":"Pangenome analysis provides insight into the evolution of the orange subfamily and a key gene for citric acid accumulation in citrus fruits","volume":"55","author":"Huang","year":"2023","journal-title":"Nat. Genet."},{"key":"B22","doi-asserted-by":"publisher","first-page":"69","DOI":"10.1038\/s41438-021-00505-2","article-title":"Genome of a citrus rootstock and global DNA demethylation caused by heterografting","volume":"8","author":"Huang","year":"2021","journal-title":"Hortic. Res."},{"key":"B23","doi-asserted-by":"publisher","first-page":"1054","DOI":"10.1002\/tax.584002","article-title":"Concept versus data in delimitation of plant genera","volume":"58","author":"Humphreys","year":"2009","journal-title":"Taxon."},{"key":"B24","first-page":"32","volume-title":"IUCN Red List Categories and Criteria: Version 3.1","year":"2012"},{"key":"B25","doi-asserted-by":"publisher","first-page":"243","DOI":"10.1270\/jsbbs.52.243","article-title":"The evaluation of genotype * environment interactions of citrus leaf morphology using image analysis and elliptic Fourier descriptors","volume":"52","author":"Iwata","year":"2002","journal-title":"Breed. Sci."},{"key":"B26","doi-asserted-by":"publisher","first-page":"23","DOI":"10.1186\/s43897-024-00098-z","article-title":"A high-quality haplotype genome of Michelia alba DC reveals differences in methylation patterns and flower characteristics","volume":"4","author":"Jiang","year":"2024","journal-title":"Mol. Hortic."},{"key":"B27","doi-asserted-by":"publisher","first-page":"241","DOI":"10.1186\/s13059-020-02154-5","article-title":"GetOrganelle: A fast and versatile toolkit for accurate de novo assembly of organelle genomes","volume":"21","author":"Jin","year":"2020","journal-title":"Genome Biol."},{"key":"B28","doi-asserted-by":"publisher","first-page":"3059","DOI":"10.1093\/nar\/gkf436","article-title":"MAFFT: A novel method for rapid multiple sequence alignment based on fast Fourier transform","volume":"30","author":"Katoh","year":"2002","journal-title":"Nucleic Acids Res."},{"key":"B29","doi-asserted-by":"publisher","first-page":"1425","DOI":"10.1105\/tpc.5.10.1425","article-title":"Apomixis: Embryo sacs and embryos formed without meiosis or fertilization in ovules","volume":"5","author":"Koltunow","year":"1993","journal-title":"Plant Cell"},{"key":"B30","doi-asserted-by":"publisher","first-page":"4453","DOI":"10.1093\/bioinformatics\/btz305","article-title":"RAxML-NG: A fast, scalable and user-friendly tool for maximum likelihood phylogenetic inference","volume":"35","author":"Kozlov","year":"2019","journal-title":"Bioinformatics"},{"key":"B31","doi-asserted-by":"publisher","first-page":"500","DOI":"10.1111\/boj.12047","article-title":"Phylogenetic position and revised classification of Acacia s.l. (Fabaceae: Mimosoideae) in Africa, including new combinations in Vachellia and Senegalia","volume":"172","author":"Kyalangalilwa","year":"2013","journal-title":"Bot. J. Linn. Soc"},{"key":"B32","unstructured":"Li\n              H.\n            \n          \n          Aligning sequence reads, clone sequences and assembly contigs with BWA-MEM\n          \n          2013"},{"key":"B33","doi-asserted-by":"publisher","first-page":"2078","DOI":"10.1093\/bioinformatics\/btp352","article-title":"The sequence alignment\/map format and SAMtools","volume":"25","author":"Li","year":"2009","journal-title":"Bioinformatics"},{"key":"B34","doi-asserted-by":"publisher","first-page":"98","DOI":"10.1016\/j.earscirev.2014.03.008","article-title":"Cretaceous tectonic evolution of South China: A preliminary synthesi","volume":"134","author":"Li","year":"2014","journal-title":"Earth-Sci. Rev."},{"key":"B35","doi-asserted-by":"publisher","DOI":"10.3390\/genes15040406","article-title":"Comparative analysis of chloroplast genomes for the genus Manglietia Blume (Magnoliaceae): Molecular structure and phylogenetic evolution","volume":"15","author":"Li","year":"2024","journal-title":"Genes (Basel)."},{"key":"B36","doi-asserted-by":"publisher","first-page":"131","DOI":"10.1038\/s41477-020-0597-3","article-title":"Evolution of self-compatibility by a mutant Sm-RNase in citrus","volume":"6","author":"Liang","year":"2020","journal-title":"Nat. Plants"},{"key":"B37","doi-asserted-by":"publisher","first-page":"1518","DOI":"10.1360\/SSV-2024-0164","article-title":"Theory of Cathaysian flora and the development of study on floristic phyto-geography in China (in Chinese)","volume":"54","author":"Liao","year":"2024","journal-title":"Sci. Sin. Vitae"},{"key":"B38","doi-asserted-by":"publisher","DOI":"10.1186\/1471-2164-13-715","article-title":"CpGAVAS, an integrated web server for the annotation, visualization, analysis, and GenBank submission of completely sequenced chloroplast genome sequences","volume":"13","author":"Liu","year":"2012","journal-title":"BMC Genomics"},{"key":"B39","doi-asserted-by":"publisher","first-page":"1503","DOI":"10.1016\/j.molp.2022.08.006","article-title":"Citrus Pan-Genome to Breeding Database (CPBD): A comprehensive genome database for citrus breeding","volume":"15","author":"Liu","year":"2022","journal-title":"Molecular Plant"},{"key":"B40","doi-asserted-by":"publisher","first-page":"754","DOI":"10.1038\/s41588-025-02122-4","article-title":"Origin and de novo domestication of sweet orange","volume":"57","author":"Liu","year":"2025","journal-title":"Nat. Genet."},{"key":"B41","doi-asserted-by":"publisher","first-page":"167","DOI":"10.7751\/telopea19971007","article-title":"A classification for edible Citrus (Rutaceae)","volume":"7","author":"Mabberley","year":"1997","journal-title":"Telopea"},{"key":"B42","doi-asserted-by":"publisher","first-page":"271","DOI":"10.7751\/telopea15954","article-title":"A classification for edible citrus: An update, with a note on Murraya (Rutaceae)","volume":"25","author":"Mabberley","year":"2022","journal-title":"Telopea"},{"key":"B43","doi-asserted-by":"publisher","first-page":"481","DOI":"10.3767\/000651904X484432","article-title":"Citrus (Rutaceae): A review of recent advances in etymology, systematics and medical applications","volume":"49","author":"Mabberley","year":"2004","journal-title":"Blumea J. Plant Taxon. Plant Geogr."},{"key":"B44","doi-asserted-by":"publisher","first-page":"1123","DOI":"10.1002\/tax.12807","article-title":"(2925) Proposal to conserve the name Citrus reticulata (Rutaceae) with a conserved type","volume":"71","author":"Mabberley","year":"2022","journal-title":"Taxon."},{"key":"B45","doi-asserted-by":"publisher","first-page":"523","DOI":"10.1093\/sysbio\/46.3.523","article-title":"Gene trees in species trees","volume":"46","author":"Maddison","year":"1997","journal-title":"Syst. Biol."},{"key":"B46","doi-asserted-by":"publisher","first-page":"584","DOI":"10.1111\/1755-0998.13265","article-title":"Dsuite - Fast D-statistics and related admixture evidence from VCF files","volume":"21","author":"Malinsky","year":"2021","journal-title":"Mol. Ecol. Resour."},{"key":"B47","doi-asserted-by":"publisher","first-page":"1297","DOI":"10.1101\/gr.107524.110","article-title":"The Genome Analysis Toolkit: a MapReduce framework for analyzing next-generation DNA sequencing data","author":"McKenna","year":"2010"},{"key":"B48","doi-asserted-by":"publisher","first-page":"2727","DOI":"10.1093\/molbev\/msaa106","article-title":"New methods to calculate concordance factors for phylogenomic datasets","volume":"37","author":"Minh","year":"2020","journal-title":"Mol. Biol. Evol."},{"key":"B49","doi-asserted-by":"crossref","DOI":"10.5772\/intechopen.1004745","volume-title":"Physiology of Citrus Flowering and Fruiting","author":"Mishra","year":"2024"},{"key":"B50","doi-asserted-by":"publisher","DOI":"10.1093\/bioinformatics\/btac741","article-title":"Updated site concordance factors minimize effects of homoplasy and taxon sampling","volume":"39","author":"Mo","year":"2023","journal-title":"Bioinformatics"},{"key":"B51","doi-asserted-by":"publisher","first-page":"22309","DOI":"10.1038\/s41598-024-73591-6","article-title":"Animal pollination contributes to more than half of citrus production","volume":"14","author":"Monasterolo","year":"2024","journal-title":"Sci. Rep."},{"key":"B52","volume-title":"An Illustrated Guide to Pollen Analysis","author":"Moore","year":"1978"},{"key":"B53","doi-asserted-by":"publisher","first-page":"1201","DOI":"10.1002\/tax.12887","article-title":"The challenges of classifying big genera such as Ipomoea","volume":"72","author":"Mu\u00f1oz-Rodr\u00edguez","year":"2023","journal-title":"Taxon."},{"key":"B54","doi-asserted-by":"publisher","first-page":"131","DOI":"10.1016\/j.plantsci.2011.08.002","article-title":"Characterization of genomic sequence showing strong association with polyembryony among diverse citrus species and cultivars, and its synteny with Vitis and Populus","volume":"183","author":"Nakano","year":"2012","journal-title":"Plant Sci."},{"key":"B55","first-page":"57","volume-title":"Chapter 4 - Citrus Taxonomy","author":"Ollitrault","year":"2020"},{"key":"B56","doi-asserted-by":"publisher","first-page":"263","DOI":"10.1080\/17550874.2016.1211192","article-title":"Soil depth shapes plant functional diversity in granite outcrops vegetation of Southwestern Australia","volume":"9","author":"Ottaviani","year":"2016","journal-title":"Plant Ecol. Divers."},{"key":"B57","first-page":"8","article-title":"Perspectives on plant competition - plant collection rate should be positively correlated with plant population size","volume":"38","author":"Pavlovic","year":"1992","journal-title":"Plant Sci. Bull."},{"key":"B58","doi-asserted-by":"publisher","first-page":"1215","DOI":"10.1111\/tpj.14993","article-title":"A chromosome\u2010scale reference genome of trifoliate orange (Poncirus trifoliata) provides insights into disease resistance, cold tolerance and genome evolution in citrus","volume":"104","author":"Peng","year":"2020","journal-title":"Plant J."},{"key":"B59","doi-asserted-by":"publisher","first-page":"291","DOI":"10.1093\/aob\/mcr322","article-title":"Exploring rock fissures: does a specialized root morphology explain endemism on granite outcrops","volume":"110","author":"Poot","year":"2012","journal-title":"Ann. Bot."},{"key":"B60","unstructured":"Plants of the world online. Facilitated by the royal botanic gardens, kew\n          \n          2026"},{"key":"B61","doi-asserted-by":"publisher","first-page":"559","DOI":"10.1086\/519795","article-title":"PLINK: a tool set for whole-genome association and population-based linkage analyses","volume":"81","author":"Purcell","year":"2007","journal-title":"Am. J. Hum. Genet."},{"key":"B62","doi-asserted-by":"publisher","first-page":"286","DOI":"10.1016\/j.ympev.2018.10.033","article-title":"Multi-allele species reconstruction using ASTRAL","volume":"130","author":"Rabiee","year":"2019","journal-title":"Mol. Phylogenet. Evol."},{"key":"B63","doi-asserted-by":"publisher","first-page":"913","DOI":"10.1007\/s13280-012-0284-3","article-title":"Wild plant species with extremely small populations require conservation and reintroduction in China","volume":"41","author":"Ren","year":"2012","journal-title":"AMBIO"},{"key":"B64","doi-asserted-by":"publisher","first-page":"539","DOI":"10.1093\/sysbio\/sys029","article-title":"MrBayes 3.2: efficient Bayesian phylogenetic inference and model choice across a large model space","volume":"61","author":"Ronquist","year":"2012","journal-title":"Syst. Biol."},{"key":"B65","doi-asserted-by":"publisher","first-page":"1654","DOI":"10.1093\/molbev\/msw079","article-title":"Fast coalescent-based computation of local branch support from quartet frequencies","volume":"33","author":"Sayyari","year":"2016","journal-title":"Mol. Biol. Evol."},{"key":"B66","doi-asserted-by":"publisher","DOI":"10.1093\/database\/baaa062","article-title":"NCBI taxonomy: a comprehensive update on curation, resources and tools","volume":"2020","author":"Schoch","year":"2020","journal-title":"Database"},{"key":"B67","doi-asserted-by":"publisher","first-page":"369","DOI":"10.2307\/2484763","article-title":"On the history and origin of citrus","volume":"102","author":"Scora","year":"1975","journal-title":"Bull. Torrey Bot. Club"},{"key":"B68","doi-asserted-by":"publisher","DOI":"10.1016\/j.earscirev.2021.103596","article-title":"Neoproterozoic plate tectonic process and Phanerozoic geodynamic evolution of the South China Block","volume":"216","author":"Shu","year":"2021","journal-title":"Earth-Sci. Rev."},{"key":"B69","doi-asserted-by":"publisher","first-page":"W609","DOI":"10.1093\/nar\/gkl315","article-title":"Suyama M, Torrents D, Bork P. PAL2NAL: robust conversion of protein sequence alignments into the corresponding codon alignments. Nucleic Acids Res 34: W609-W612","volume":"34","author":"Suyama","year":"2006","journal-title":"Nucleic Acids Res."},{"key":"B70","volume-title":"The Botany of Citrus and its Wild Relatives of the Orange Subfamily (Family Rutaceae, Subfamily Aurantioideae)","author":"Swingle","year":"1943"},{"key":"B71","volume-title":"The Botany of Citrus and Wild Relatives","author":"Swingle","year":"1967"},{"key":"B72","first-page":"190","article-title":"The botany of citrus and its wild relatives","volume-title":"The Citrus Industry","author":"Swingle","year":"1967"},{"key":"B73","volume-title":"The Genus Citrus","author":"Talon","year":"2020"},{"key":"B74","volume-title":"Species Problem in Citrus: A Critical Study of Wild and Cultivated Unites of Citrus, Based Upon Field Studies in Their Native Homes (Revisio Aurantiacearum Ix)","author":"Tanaka","year":"1954"},{"key":"B75","volume-title":"Species Problem in Citrus (Revisio Aurantiacearum Ix)","author":"Tanaka","year":"1954"},{"key":"B76","first-page":"139","article-title":"Misunderstanding with regards citrus classification and nomenclature","volume":"21","author":"Tanaka","year":"1969","journal-title":"Bull. Univ. Osaka Prefect. Ser. B."},{"key":"B77","unstructured":"Thiers\n              B. M.\n            \n          \n          New York Botanical Garden\u2019s Virtual Herbarium\n          Index Herbariorum: a global directory of public herbaria and associated staff\n          \n          2026"},{"key":"B78","doi-asserted-by":"publisher","DOI":"10.3390\/horticulturae9070793","article-title":"Exploring the phylogenetic relationship among citrus through leaf shape traits: a morphological study on citrus leaves","volume":"9","author":"Traband","year":"2023","journal-title":"Horticulturae"},{"key":"B79","doi-asserted-by":"publisher","first-page":"1147","DOI":"10.1093\/sysbio\/syac011","article-title":"Ghost lineages highly influence the interpretation of introgression tests","volume":"71","author":"Tricou","year":"2022","journal-title":"Syst. Biol."},{"key":"B80","doi-asserted-by":"publisher","first-page":"1024","DOI":"10.1016\/j.molp.2018.06.001","article-title":"Genome of wild mandarin and domestication history of mandarin","volume":"11","author":"Wang","year":"2018","journal-title":"Mol. Plant"},{"key":"B81","doi-asserted-by":"publisher","DOI":"10.1093\/nsr\/nwac114","article-title":"Structural variation and parallel evolution of apomixis in citrus during domestication and diversification","volume":"9","author":"Wang","year":"2022","journal-title":"Natl. Sci. Rev."},{"key":"B82","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pgen.1010811","article-title":"Genomic conservation of crop wild relatives: a case study of citrus","volume":"19","author":"Wang","year":"2023","journal-title":"PLoS Genet."},{"key":"B83","doi-asserted-by":"publisher","DOI":"10.3389\/fpls.2022.867659","article-title":"Fortunella venosa (Champ. ex Benth.) C. C. Huang and F. hindsii (Champ. ex Benth.) Swingle as independent species: evidence from morphology and molecular systematics and taxonomic revision of Fortunella (Rutaceae)","volume":"13","author":"Wang","year":"2022","journal-title":"Front. Plant Sci."},{"key":"B84","doi-asserted-by":"publisher","first-page":"765","DOI":"10.1038\/ng.3839","article-title":"Genomic analyses of primitive, wild and cultivated citrus provide insights into asexual reproduction","volume":"49","author":"Wang","year":"2017","journal-title":"Nat. Genet."},{"key":"B85","volume-title":"Pollen Flora of Seed Plants","author":"Wei","year":"2003"},{"key":"B86","doi-asserted-by":"publisher","first-page":"656","DOI":"10.1038\/nbt.2906","article-title":"Sequencing of diverse mandarin, pummelo and orange genomes reveals complex history of admixture during citrus domestication","volume":"32","author":"Wu","year":"2014","journal-title":"Nat. Biotechnol."},{"key":"B87","doi-asserted-by":"publisher","first-page":"4377","DOI":"10.1038\/s41467-021-24653-0","article-title":"Diversification of mandarin citrus by hybrid speciation and apomixis","volume":"12","author":"Wu","year":"2021","journal-title":"Nat. Commun."},{"key":"B88","doi-asserted-by":"publisher","first-page":"311","DOI":"10.1038\/nature25447","article-title":"Genomics of the origin and evolution of citrus","volume":"554","author":"Wu","year":"2018","journal-title":"Nature"},{"key":"B89","doi-asserted-by":"publisher","DOI":"10.3390\/genes16010097","article-title":"Identification and functional analysis of candidate genes influencing citrus leaf size through transcriptome and coexpression network approaches","volume":"16","author":"Wu","year":"2025","journal-title":"Genes (Basel)."},{"key":"B90","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.2320674121","article-title":"Hidden hotspots of amphibian biodiversity in China","volume":"121","author":"Xu","year":"2024","journal-title":"Proc. Natl. Acad. Sci."},{"key":"B91","doi-asserted-by":"publisher","DOI":"10.1016\/j.biocon.2020.108535","article-title":"China\u2019s conservation program on plant species with extremely small populations (PSESP): progress and perspectives","volume":"244","author":"Yang","year":"2020","journal-title":"Biol. Conserv."},{"key":"B92","doi-asserted-by":"publisher","first-page":"153","DOI":"10.1186\/s12859-018-2129-y","article-title":"ASTRAL-III: polynomial time species tree reconstruction from partially resolved gene trees","volume":"19","author":"Zhang","year":"2018","journal-title":"BMC Bioinf."},{"key":"B93","first-page":"11","article-title":"Rutaceae","volume-title":"Flora of China","author":"Zhang","year":"2008"},{"key":"B94","first-page":"335","article-title":"Phylogenetic relationships among Fortunella and its relatives as revealed by SSR markers","volume":"23","author":"Zhang","year":"2006","journal-title":"J. Fruit Sci."},{"key":"B95","volume-title":"Fruit Trees in China. Citrus Volume","author":"Zhou","year":"2009"},{"key":"B96","doi-asserted-by":"publisher","DOI":"10.15302\/J-FASE-2021436","article-title":"New insights into the phylogeny and speciation of kumquat (Fortunella spp.) based on chloroplast SNP, nuclear SSR and whole-genome sequencing","volume":"9","author":"Zhu","year":"2022","journal-title":"Front. Agric. Sci. Eng."},{"key":"B97","doi-asserted-by":"publisher","first-page":"2199","DOI":"10.1111\/pbi.13132","article-title":"Genome sequencing and CRISPR\/Cas9 gene editing of an early flowering Mini-Citrus (Fortunella hindsii)","volume":"17","author":"Zhu","year":"2019","journal-title":"Plant Biotechnol. J."}],"container-title":["Frontiers in Plant Science"],"original-title":[],"link":[{"URL":"https:\/\/www.frontiersin.org\/articles\/10.3389\/fpls.2026.1905317\/full","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,9,3]],"date-time":"2026-09-03T06:40:17Z","timestamp":1788417617000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.frontiersin.org\/articles\/10.3389\/fpls.2026.1905317\/full"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,9,3]]},"references-count":97,"alternative-id":["10.3389\/fpls.2026.1905317"],"URL":"https:\/\/doi.org\/10.3389\/fpls.2026.1905317","relation":{},"ISSN":["1664-462X"],"issn-type":[{"value":"1664-462X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,9,3]]},"article-number":"1905317"}}