Coevolution in Hybrid Genomes: Nuclear-Encoded Rubisco Small Subunits and Their Plastid-Targeting Translocons Accompanying Sequential Allopolyploidy Events in Triticum Li, Changping Wang, Xiaofei Wendel, Jonathan Xiao, Yaxian Sun, Xuhan Wang, Jinbin Yang, Xuan Sun, Yuchen Sha, Yan Lv, Ruili Yu, Yanan Ding, Baoxu Zhang, Zhibin Li, Ning Wang, Tianya Wendel, Jonathan Liu, Bao Gong, Lei
dc.contributor.department Ecology, Evolution and Organismal Biology 2021-02-25T13:28:20.000 2021-02-25T18:42:35Z 2021-02-25T18:42:35Z Wed Jan 01 00:00:00 UTC 2020 2020-12-01
dc.description.abstract <p>The <em>Triticum</em>/<em>Aegilops</em> complex includes hybrid species resulting from homoploid hybrid speciation and allopolyploid speciation. Sequential allotetra- and allohexaploidy events presumably result in two challenges for the hybrids, which involve 1) cytonuclear stoichiometric disruptions caused by combining two diverged nuclear genomes with the maternal inheritance of the cytoplasmic organellar donor; and 2) incompatibility of chimeric protein complexes with diverged subunits from nuclear and cytoplasmic genomes. Here, we describe coevolution of nuclear <em>rbcS</em> genes encoding the small subunits of Rubisco (ribulose 1,5-bisphosphate carboxylase/oxygenase) and nuclear genes encoding plastid translocons, which mediate recognition and translocation of nuclear-encoded proteins into plastids, in allopolyploid wheat species. We demonstrate that intergenomic paternal-to-maternal gene conversion specifically occurred in the genic region of the homoeologous <em>rbcS</em>3 gene from the D-genome progenitor of wheat (abbreviated as <em>rbcS</em>3D) such that it encodes a maternal-like or B-subgenome-like SSU3D transit peptide in allohexaploid wheat but not in allotetraploid wheat. Divergent and limited interaction between SSU3D and the D-subgenomic TOC90D translocon subunit is implicated to underpin SSU3D targeting into the chloroplast of hexaploid wheat. This implicates early selection favoring individuals harboring optimal maternal-like organellar SSU3D targeting in hexaploid wheat. These data represent a novel dimension of cytonuclear evolution mediated by organellar targeting and transportation of nuclear proteins.</p>
dc.description.comments <p>This article is published as Li, Changping, Xiaofei Wang, Yaxian Xiao, Xuhan Sun, Jinbin Wang, Xuan Yang, Yuchen Sun et al. "Co-evolution in hybrid genomes: nuclear-encoded rubisco small subunits and their plastid-targeting translocons accompanying sequential allopolyploidy events in Triticum." <em>Molecular Biology and Evolution</em> 37 (2020): 3409-3422. doi: <a href="">10.1093/molbev/msaa158</a>.</p>
dc.format.mimetype application/pdf
dc.identifier archive/
dc.identifier.articleid 1445
dc.identifier.contextkey 20478303
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath eeob_ag_pubs/442
dc.language.iso en
dc.source.bitstream archive/|||Sat Jan 15 00:18:31 UTC 2022
dc.source.bitstream archive/|||Wed Dec 09 22:14:54 UTC 2020
dc.source.uri 10.1093/molbev/msaa158
dc.subject.disciplines Ecology and Evolutionary Biology
dc.subject.disciplines Genetics and Genomics
dc.subject.disciplines Molecular Genetics
dc.subject.keywords hybrid species
dc.subject.keywords Triticum/Aegilops complex
dc.subject.keywords Rubisco
dc.subject.keywords cytonuclear coordination
dc.subject.keywords CECs
dc.subject.keywords translocon
dc.title Coevolution in Hybrid Genomes: Nuclear-Encoded Rubisco Small Subunits and Their Plastid-Targeting Translocons Accompanying Sequential Allopolyploidy Events in Triticum
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 6d2c458f-b99a-4af5-8869-8b7b2e304592
relation.isOrgUnitOfPublication 6fa4d3a0-d4c9-4940-945f-9e5923aed691
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