Deciphering the Diploid Ancestral Genome of the Mesohexaploid Brassica rapa

doi:10.1105/tpc.113.110486

CORC > 中国农业科学院 > 蔬菜花卉研究所

	Deciphering the Diploid Ancestral Genome of the Mesohexaploid Brassica rapa
	Cheng, Feng 1; Mandakova, Terezie 2,3; Wu, Jian 1; Xie, Qi 4; Lysak, Martin A.2,3; Wang, Xiaowu 1
刊名	PLANT CELL
	2013
卷号	25 期号:5 页码:1541-1554
ISSN号	1040-4651
DOI	10.1105/tpc.113.110486
通讯作者	Cheng, Feng
英文摘要	The genus Brassica includes several important agricultural and horticultural crops. Their current genome structures were shaped by whole-genome triplication followed by extensive diploidization. The availability of several crucifer genome sequences, especially that of Chinese cabbage (Brassica rapa), enables study of the evolution of the mesohexaploid Brassica genomes from their diploid progenitors. We reconstructed three ancestral subgenomes of B. rapa (n = 10) by comparing its whole-genome sequence to ancestral and extant Brassicaceae genomes. All three B. rapa paleogenomes apparently consisted of seven chromosomes, similar to the ancestral translocation Proto-Calepineae Karyotype (tPCK; n = 7), which is the evolutionarily younger variant of the Proto-Calepineae Karyotype (n = 7). Based on comparative analysis of genome sequences or linkage maps of Brassica oleracea, Brassica nigra, radish (Raphanus sativus), and other closely related species, we propose a two-step merging of three tPCK-like genomes to form the hexaploid ancestor of the tribe Brassiceae with 42 chromosomes. Subsequent diversification of the Brassiceae was marked by extensive genome reshuffling and chromosome number reduction mediated by translocation events and followed by loss and/or inactivation of centromeres. Furthermore, via interspecies genome comparison, we refined intervals for seven of the genomic blocks of the Ancestral Crucifer Karyotype (n = 8), thus revising the key reference genome for evolutionary genomics of crucifers.
学科主题	Biochemistry & Molecular Biology ; Plant Sciences ; Cell Biology ; BIOCHEMISTRY & MOLECULAR BIOLOGY ; CELL BIOLOGY ; PLANT SCIENCES
语种	英语
出版者	AMER SOC PLANT BIOLOGISTS
WOS记录号	WOS:000321035800009
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/101894]
专题	蔬菜花卉研究所
作者单位	1.Chinese Acad Agr Sci, Inst Vegetables & Flowers, Beijing 100081, Peoples R China 2.Masaryk Univ, Cent European Inst Technol CEITEC, CZ-62500 Brno, Czech Republic 3.Masaryk Univ, Fac Sci, CZ-62500 Brno, Czech Republic 4.Chinese Acad Sci, Inst Genet & Dev Biol, Natl Ctr Plant Gene Res Beijing, State Key Lab Plant Genom, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Cheng, Feng,Mandakova, Terezie,Wu, Jian,et al. Deciphering the Diploid Ancestral Genome of the Mesohexaploid Brassica rapa[J]. PLANT CELL,2013,25(5):1541-1554.
APA	Cheng, Feng,Mandakova, Terezie,Wu, Jian,Xie, Qi,Lysak, Martin A.,&Wang, Xiaowu.(2013).Deciphering the Diploid Ancestral Genome of the Mesohexaploid Brassica rapa.PLANT CELL,25(5),1541-1554.
MLA	Cheng, Feng,et al."Deciphering the Diploid Ancestral Genome of the Mesohexaploid Brassica rapa".PLANT CELL 25.5(2013):1541-1554.