Prospects on the evolutionary mitogenomics of plants: A case study on the olive family (Oleaceae)

被引:49
作者
Van de Paer, Celine [1 ]
Bouchez, Olivier [2 ]
Besnard, Guillaume [1 ]
机构
[1] Univ Toulouse, CNRS, Lab Evolut & Diversite Biol, ENSFEA,IRD,UMR5174,EDB, Toulouse, France
[2] INRA, US 1426, GeT PlaGe, Castanet Tolosan, France
关键词
cytoplasmic male sterility; genome skimming; metagenomics; mitogenome; mtpt; Olea europaea; Oleinae; phylogeny; plastome; MITOCHONDRIAL GENOME; HORIZONTAL TRANSFER; LINKAGE DISEQUILIBRIUM; CHLOROPLAST DNA; PLASTID GENOME; SEQUENCE; NUCLEAR; GENES; INHERITANCE; GENUS;
D O I
10.1111/1755-0998.12742
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The mitogenome is rarely used to reconstruct the evolutionary history of plants, contrary to nuclear and plastid markers. Here, we evaluate the usefulness of mitochondrial DNA for molecular evolutionary studies in Oleaceae, in which cases of cytoplasmic male sterility (CMS) and of potentially contrasted organelle inheritance are known. We compare the diversity and the evolution of mitochondrial and chloroplast genomes by focusing on the olive complex and related genera. Using high-throughput techniques, we reconstructed complete mitogenomes (ca. 0.7Mb) and plastomes (ca. 156kb) for six olive accessions and one Chionanthus. A highly variable organization of mitogenomes was observed at the species level. In olive, two specific chimeric genes were identified in the mitogenome of lineage E3 and may be involved in CMS. Plastid-derived regions (mtpt) were observed in all reconstructed mitogenomes. Through phylogenetic reconstruction, we demonstrate that multiple integrations of mtpt regions have occurred in Oleaceae, but mtpt regions shared by all members of the olive complex derive from a common ancestor. We then assembled 52 conserved mitochondrial gene regions and complete plastomes of ten additional accessions belonging to tribes Oleeae, Fontanesieae and Forsythieae. Phylogenetic congruence between topologies based on mitochondrial regions and plastomes suggests a strong disequilibrium linkage between both organellar genomes. Finally, while phylogenetic reconstruction based on plastomes fails to resolve the evolutionary history of maternal olive lineages in the Mediterranean area, their phylogenetic relationships were successfully resolved with complete mitogenomes. Overall, our study demonstrates the great potential of using mitochondrial DNA in plant phylogeographic and metagenomic studies.
引用
收藏
页码:407 / 423
页数:17
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