Evolutionary genetics of wheat mitochondrial genomes  

作　　者：Hui-Lin Hu Fan Zhang Pei Wang Fu-Hao Lu 

机构地区：[1]State Key Laboratory of Crop Stress Adaptation and Improvement,School of Life Sciences,Henan University,Kaifeng 475004,Henan,China [2]Henan Key Laboratory of Big Data Analysis and Processing,School of Computer and Information Engineering,Henan University,Kaifeng 475004,Henan,China [3]School of Mathematics and Statistics,Henan University,Kaifeng 475004,Henan,China

出　　处：《The Crop Journal》2023年第6期1774-1781,共8页作物学报（英文版）

基　　金：the 111 Project(D16014).

摘　　要：The Triticum-Aegilops complex provides ideal models for the study of polyploidization,and mitochondrial genomes(mtDNA)can be used to trace cytoplasmic inheritance and energy production following polyploidization.In this study,gapless mitochondrial genomes for 19 accessions of five Triticum or Aegilops species were assembled.Comparative genomics confirmed that the BB-genome progenitor donated mtDNA to tetraploid T.turgidum(genome formula AABB),and that this mtDNA was then passed on to the hexaploid T.aestivum(AABBDD).T urartu(AA)was the paternal parent of T.timopheevii(AAGG),and an earlier Ae.tauschii(DD)was the maternal parent of Ae.cylindrica(CCDD).Genic sequences were highly conserved within species,but frequent rearrangements and nuclear or chloroplast DNA insertions occurred during speciation.Four highly variable mitochondrial genes(atp6,cob,nad6,and nad9)were established as marker genes for Triticum and Aegilops species identification.The BB/GG-specific atp6 and cob genes,which were imported from the nuclear genome,could facilitate identification of their diploid progenitors.Genic haplotypes and repeat-sequence patterns indicated that BB was much closer to GG than to Ae.speltoides(SS).These findings provide novel insights into the polyploid evolution of the Triticum/Aegilops complex from the perspective of mtDNA,advancing understanding of energy supply and adaptation in wheat species。

关 键 词：WHEAT MITOCHONDRION MTDNA Comparative genomics POLYPLOIDIZATION 

分 类 号：S512.1[农业科学—作物学]