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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2016.1
- 수록면
- 107 - 122 (16page)
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The genus Brassica is an important resource for major agricultural products such as oils, vegetable and fodder. The Brassiceae tribe-specific whole-genome triplication that occurred ~15.9 million years ago influenced the speciation and morphological diversification that has been exploited in agriculture, making Brassica an excellent model system for studying polyploidization- mediated evolution. Genome sequencing and comparative genome analysis have revealed conserved structures and uncovered the genome evolution of Brassica species. While chromosome shuffling and asymmetric subgenome gene retention are widely reported in Brassica species, limited information is available about the dynamics of repetitive elements (REs), which are central to epigenetic mechanisms and thus play a pivotal role in plant genome adaptation and evolution. The assembled reference genome sequences of B. rapa (AA) and B. oleracea (CC), and their derived allotetraploid, B. napus (AACC), cover 58%, 86%, and 75% of their respective estimated genome sizes. The remaining non-assembled genome portions vary between these three genome sequences, and the major components remain hidden in each genome. Here, we review the dynamics of the major Brassica repeats that have played roles in speciation of the AA, CC, and AACC genomes. We show that 10 major Brassica repeats appear to occupy more than 50% of each respective unassembled genome sequence, yet represent less than 1% of assembled reference genome sequences. We have estimated their genome proportions using whole-genome Illumina reads and cytogenetic analyses in an attempt to understand the role of these repeats in genome evolution.
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참고문헌 (90)
참고문헌 신청
Alix K / 2008 / The CACTA transposon Bot1 played a major role in Brassica genome divergence and gene proliferation / Plant J 56:1030~1044
Arias T / 2014 / Diversification times among Brassica (Brassicaceae)crops suggest hybrid formation after 20 million years of divergence / Am. J. Bot 101:86~91
Barker MS / 2009 / Paleopolyploidy in the Brassicales: analyses of the Cleome transcriptome elucidate the history of genome duplications in Arabidopsis and other Brassicales / Genome Biol. Evol 1:391~399
Bell CD / 2010 / The age and diversification of the angiosperms re-revisited / AM. J. Bot 97:1296~1303
Bennetzen JL / 2014 / The contributions of transposable elements to the structure, function, and evolution of plant genomes / Annu. Rev. Plant Biol 65:505~530
Arias T / 2014 / Diversification times among Brassica (Brassicaceae)crops suggest hybrid formation after 20 million years of divergence / Am. J. Bot 101:86~91
Barker MS / 2009 / Paleopolyploidy in the Brassicales: analyses of the Cleome transcriptome elucidate the history of genome duplications in Arabidopsis and other Brassicales / Genome Biol. Evol 1:391~399
Bell CD / 2010 / The age and diversification of the angiosperms re-revisited / AM. J. Bot 97:1296~1303
Bennetzen JL / 2014 / The contributions of transposable elements to the structure, function, and evolution of plant genomes / Annu. Rev. Plant Biol 65:505~530
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