CHENG, Feng, Terezie MANDÁKOVÁ, Jian WU, Qi XIE, Martin LYSÁK and Xiaowu WANG. Deciphering the Diploid Ancestral Genome of the Mesohexaploid Brassica rapa. Plant Cell. AMER SOC PLANT BIOLOGISTS, vol. 25, No 5, p. 1541-1554. ISSN 1040-4651. doi:10.1105/tpc.113.110486. 2013.
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Basic information
Original name Deciphering the Diploid Ancestral Genome of the Mesohexaploid Brassica rapa
Authors CHENG, Feng (156 China), Terezie MANDÁKOVÁ (203 Czech Republic, belonging to the institution), Jian WU (156 China), Qi XIE (156 China), Martin LYSÁK (203 Czech Republic, guarantor, belonging to the institution) and Xiaowu WANG (156 China).
Edition Plant Cell, AMER SOC PLANT BIOLOGISTS, 2013, 1040-4651.
Other information
Original language English
Type of outcome Article in a journal
Field of Study Genetics and molecular biology
Country of publisher United States of America
Confidentiality degree is not subject to a state or trade secret
WWW URL
Impact factor Impact factor: 9.575
RIV identification code RIV/00216224:14740/13:00066451
Organization unit Central European Institute of Technology
Doi http://dx.doi.org/10.1105/tpc.113.110486
UT WoS 000321035800009
Keywords in English CHROMOSOME-NUMBER REDUCTION; ARABIDOPSIS-THALIANA; SPECIES BRASSICACEAE; KARYOTYPE EVOLUTION; RAPHANUS-SATIVUS; SEQUENCE; PHYLOGENY; MAP; BLOCKS; RECONSTRUCTION
Tags ok, rivok
Tags International impact, Reviewed
Changed by Changed by: prof. Mgr. Martin Lysák, Ph.D., DSc., učo 204166. Changed: 25/1/2017 12:54.
Abstract
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.
Links
ED1.1.00/02.0068, research and development projectName: CEITEC - central european institute of technology
GBP501/12/G090, research and development projectName: Evoluce a funkce komplexních genomů rostlin
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