Genomes of Meniocus linifolius and Tetracme quadricornis reveal the ancestral karyotype and genomic features of core Brassicaceae  

作　　者：Jie Liu Shi-Zhao Zhou Yun-Long Liu Bin-Yan Zhao Dongmei Yu Mi-Cai Zhong Xiao-Dong Jiang Wei-Hua Cui Jiu-Xia Zhao Juan Qiu Liang-Min Liu Zhen-Hua Guo Hong-Tao Li Dun-Yan Tan Jin-Yong Hu De-Zhu Li 

机构地区：[1]CAS Key Laboratory for Plant Diversity and Biogeography of East Asia&Yunnan Key Laboratory of Crop Wild Relatives Omics,Kunming Institute of Botany,Chinese Academy of Sciences,Kunming 650201,China [2]Germplasm Bank of Wild Species&Yunnan Key Laboratory for Crop Wild Relatives Omics,Kunming Institute of Botany,Chinese Academy of Sciences,Kunming 650201,China [3]College of Life Sciences,Xinjiang Agricultural University,Ürümqi 830052,China [4]University of Chinese Academy of Sciences,Beijing 100049,China [5]These authors contributed equally to this article

出　　处：《Plant Communications》2024年第7期68-89,共22页植物通讯（英文）

基　　金：supported by the Priority Research Program of the Chinese Academy of Sciences(CAS)(Grant No.XDA0440000 and XDB31000000).

摘　　要：Brassicaceae represents an important plant family from both a scientific and economic perspective.However,genomic features related to the early diversification of this family have not been fully characterized,especially upon the uplift of the Tibetan Plateau,which was followed by increasing aridity in the Asian interior,intensifying monsoons in Eastern Asia,and significantly fluctuating daily temperatures.Here,we reveal the genomic architecture that accompanied early Brassicaceae diversification by analyzing two high-quality chromosome-level genomes for Meniocus linifolius(Arabodae;clade D)and Tetracme quadricornis(Hesperodae;clade E),together with genomes representing all major Brassicaceae clades and the basal Aethionemeae.We reconstructed an ancestral core Brassicaceae karyotype(CBK)containing 9 pseudochromosomes with 65 conserved syntenic genomic blocks and identified 9702 conserved genes in Brassicaceae.We detected pervasive conflicting phylogenomic signals accompanied by widespread ancient hybridization events,which correlate well with the early divergence of core Brassicaceae.We identified a successive Brassicaceae-specific expansion of the class I TREHALOSE-6-PHOSPHATE SYNTHASE 1(TPS1)gene family,which encodes enzymes with essential regulatory roles in flowering time and embryo development.The TPS1s were mainly randomly amplified,followed by expression divergence.Our results provide fresh insights into historical genomic features coupled with Brassicaceae evolution and offer a potential model for broad-scale studies of adaptive radiation under an ever-changing environment.

关 键 词：CRUCIFERAE genomic features ancient hybridization core Brassicaceae karyotype CBK TREHALOSE-6-PHOSPHATE SYNTHASE 1 genes TPS1s 

分 类 号：Q94[生物学—植物学]