Chromosome fusions shaped karyotype evolution and evolutionary relationships in the model family Brassicaceae
文献类型： 外文期刊
作者： Jiang, Xinyao 1 ; Hu, Quanjun 1 ; Mei, Dong 1 ; Li, Xiaonan 1 ; Xiang, Ling 1 ; Al-Shehbaz, Ihsan A. 3 ; Song, Xiaoming 4 ; Liu, Jianquan 1 ; Lysak, Martin A. 6 ; Sun, Pengchuan 1 ;
作者机构： 1.Sichuan Univ, Key Lab Bioresources & Ecoenvironm, Chengdu 610065, Peoples R China
2.Sichuan Univ, Coll Life Sci, Sichuan Zoige Alpine Wetland Ecosyst Natl Observat, Chengdu, Peoples R China
3.Missouri Bot Garden, St Louis, MO USA
4.North China Univ Sci & Technol, Sch Life Sci, Tangshan, Hebei, Peoples R China
5.Lanzhou Univ, Coll Ecol, State Key Lab Herbage Improvement & Grassland Agro, Lanzhou, Peoples R China
6.Masaryk Univ, CEITEC Cent European Inst Technol, Brno, Czech Republic
7.Masaryk Univ, Fac Sci, Dept Expt Bot, Brno, Czech Republic
8.Chinese Acad Trop Agr Sci, Natl Key Lab Trop Crop Breeding, Trop Crops Genet Resources Inst, Haikou, Peoples R China
期刊名称：NATURE COMMUNICATIONS （ 影响因子：15.7； 五年影响因子：17.2 ）
ISSN：
年卷期： 2025 年 16 卷 1 期
页码：
收录情况： SCI
摘要： The ancestral crucifer karyotype and 22 conserved genomic blocks (CGBs) facilitate phylogenomic analyses in the Brassicaceae. Chromosomal rearrangements reshuffled CGBs of ancestral chromosomes during karyotype evolution. Here, we identify eight protochromosomes representing the common ancestral karyotype (ACBK) of the two Brassicoideae supertribes: Camelinodae (Lineage I) and Brassicodae (Lineage II). The characterization of multiple cascading fusion events allows us to infer evolutionary relationships based on these events. In the Camelinodae, the ACBK first evolved into the AKI genome, which remained conserved in the Cardamineae, whereas it was altered to tAKI by a reciprocal translocation that preceded the diversification of most Camelinodae tribes. The identified fusion breakpoints largely overlap with CGB boundaries, suggesting that CGBs are mainly disrupted by chromosome fusions. Our results demonstrate the stable inheritance of chromosome fusions and their importance for reconstructing evolutionary relationships. The chromosomal breakpoint approach provides a basis for ancestral state reconstruction based on chromosome-level genome assemblies.
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