| RRC ID |
56252
|
| 著者 |
Miki Y, Yoshida K, Mizuno N, Nasuda S, Sato K, Takumi S.
|
| タイトル |
Origin of wheat B-genome chromosomes inferred from RNA sequencing analysis of leaf transcripts from section Sitopsis species of Aegilops.
|
| ジャーナル |
DNA Res
|
| Abstract |
Dramatic changes occasionally occur in intergenic regions leading to genomic alterations during speciation and will consequently obscure the ancestral species that have contributed to the formation of allopolyploid organisms. The S genome of five species of section Sitopsis of genus Aegilops is considered to be an origin of B-genome in cultivated tetraploid and hexaploid wheat species, although its actual donor is still unclear. Here, we attempted to elucidate phylogenetic relationship among Sitopsis species by performing RNA sequencing of the coding regions of each chromosome. Thus, genome-wide polymorphisms were extensively analyzed in 19 accessions of the Sitopsis species in reference to the tetraploid and hexaploid wheat B genome sequences and consequently were efficiently anchored to the B-genome chromosomes. The results of our genome-wide exon sequencing and resultant phylogenetic analysis indicate that Ae. speltoides is likely to be the direct donor of all chromosomes of the wheat B genome. Our results also indicate that the genome differentiation during wheat allopolyploidization from S to B proceeds at different speeds over the chromosomes rather than at constant rate and recombination could be a factor determining the speed. This observation is potentially generalized to genome differentiation during plant allopolyploid evolution.
|
| 巻・号 |
26(2)
|
| ページ |
171-182
|
| 公開日 |
2019-4-1
|
| DOI |
10.1093/dnares/dsy047
|
| PII |
5304673
|
| PMID |
30715317
|
| PMC |
PMC6476730
|
| MeSH |
Aegilops / classification
Aegilops / genetics*
Chromosomes, Plant
Evolution, Molecular*
Exome Sequencing
Genome, Plant*
Genomics
Phylogeny*
Plant Leaves / genetics*
Polymorphism, Genetic
Sequence Analysis, RNA*
Triticum / genetics*
|
| IF |
4.0
|
| 引用数 |
9
|
| リソース情報 |
| コムギ |
KU-2208A
KU-14601
KU-14605
KU-12963a
KU-2236
KU-7716
KU-7848
KU-5784
KU-14613
KU-5752 |
