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Mimosoid legume plastome evolution: IR expansion, tandem repeat expansions, and accelerated rate of evolution in clpP Public Deposited

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  • The Leguminosae has emerged as a model for studying angiosperm plastome evolution because of its striking diversity of structural rearrangements and sequence variation. However, most of what is known about legume plastomes comes from few genera representing a subset of lineages in subfamily Papilionoideae. We investigate plastome evolution in subfamily Mimosoideae based on two newly sequenced plastomes (Inga and Leucaena) and two recently published plastomes (Acacia and Prosopis), and discuss the results in the context of other legume and rosid plastid genomes. Mimosoid plastomes have a typical angiosperm gene content and general organization as well as a generally slow rate of protein coding gene evolution, but they are the largest known among legumes. The increased length results from tandem repeat expansions and an unusual 13 kb IR-SSC boundary shift in Acacia and Inga. Mimosoid plastomes harbor additional interesting features, including loss of clpP intron1 in Inga, accelerated rates of evolution in clpP for Acacia and Inga, and dN/dS ratios consistent with neutral and positive selection for several genes. These new plastomes and results provide important resources for legume comparative genomics, plant breeding, and plastid genetic engineering, while shedding further light on the complexity of plastome evolution in legumes and angiosperms.
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  • Dugas, D. V., Hernandez, D., Koenen, E. J., Schwarz, E., Straub, S., Hughes, C. E., ... & Hajrah, N. H. (2015). Mimosoid legume plastome evolution: IR expansion, tandem repeat expansions, and accelerated rate of evolution in clpP. Scientific Reports, 5. doi:10.1038/srep16958
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  • This research was supported by the NSF Plant Genome Research Panel (grant 1238731, CDB), Swiss National Science Foundation (grant 31003A_135522, CEH), and Vice President for Educational Affairs Prof Dr Abdulrahman O. Alyoubi at King Abdulaziz University (KAU) Jeddah, Saudi Arabia (RKJ, JSMS, NHH, NSA, ALAM).
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  • description.provenance : Submitted by Patricia Black (patricia.black@oregonstate.edu) on 2015-12-15T17:39:24Z No. of bitstreams: 3 license_rdf: 1370 bytes, checksum: cd1af5ab51bcc7a5280cf305303530e9 (MD5) Straub ShannonPlantBioMimosoidLegumePlastome.pdf: 1604717 bytes, checksum: 9f16c4188978b8e92ddb7aab57407c6d (MD5) Straub ShannonPlantBioMimosoidLegumePlastomeSupFigure1.pdf: 412167 bytes, checksum: 906d36c6e96630e7df2c304fa5d96eeb (MD5)
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  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2015-12-15T17:40:14Z (GMT) No. of bitstreams: 3 license_rdf: 1370 bytes, checksum: cd1af5ab51bcc7a5280cf305303530e9 (MD5) Straub ShannonPlantBioMimosoidLegumePlastome.pdf: 1604717 bytes, checksum: 9f16c4188978b8e92ddb7aab57407c6d (MD5) Straub ShannonPlantBioMimosoidLegumePlastomeSupFigure1.pdf: 412167 bytes, checksum: 906d36c6e96630e7df2c304fa5d96eeb (MD5)

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