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The genome of the mesopolyploid crop species Brassica rapa.

来源: 发布时间:07-06 作者: 点击量:
Xiaowu Wang., Hanzhong Wang, Jun Wang, Rifei Sun, Jian Wu, Shengyi Liu, Yinqi Bai., Mun, J.H., Bancroft, I., Feng Cheng, Sanwen Huang, Xixiang Li, Hua, W., Freeling, M., Pires, J.C., Paterson, A.H., Chalhoub, B., Wang, B., Hayward, A., Sharpe, A.G., Park, B.S., Weisshaar, B., Liu, B., Li, B., Tong, C., Song, C., Duran, C., Peng, C., Geng, C., Koh, C., Lin, C., Edwards, D., Mu, D., Shen, D., Soumpourou, E., Li, F., Fraser, F., Conant, G., Lassalle, G., King, G.J., Bonnema, G., Tang, H., Belcram, H., Zhou, H., Hirakawa, H., Abe, H., Guo, H., Jin, H., Parkin, I.A., Batley, J., Kim, J.S., Just, J., Li, J., Xu, J., Deng, J., Kim, J.A., Yu, J., Meng, J., Min, J., Poulain, J., Hatakeyama, K., Wu, K., Wang, L., Fang, L., Trick, M., Links, M.G., Zhao, M., Jin, M., Ramchiary, N., Drou, N., Berkman, P.J., Cai, Q., Huang, Q., Li, R., Tabata, S., Cheng, S., Zhang, S., Sato, S., Sun, S., Kwon, S.J., Choi, S.R., Lee, T.H., Fan, W., Zhao, X., Tan, X., Xu, X., Wang, Y., Qiu, Y., Yin, Y., Li, Y., Du, Y., Liao, Y., Lim, Y., Narusaka, Y., Wang, Z., Li, Z., Xiong, Z., and Zhang, Z. 1

Nature Genetics,43,1035-1039,(2011)
DOI:10.1038/ng.919

Abstract: Model species have provided valuable insights into angiosperm (flowering plant) genome structure, function and evolution. For example, A. thaliana has experienced two genome duplications since its divergence fromCarica, with rapid DNA sequence divergence, extensive gene loss and fractionation of ancestral gene order eroding the resemblance of A. thaliana to ancestral Brassicales1. Compared with an ancestor at just a few million years ago, A. thaliana has undergone a ~30% reduction in genome size2 and 9–10 chromosomal rearrangements3, 4 that differentiate it from its sister species Arabidopsis lyrata. Whole-genome duplication has been observed in all plant genomes sequenced to date. A. thaliana has undergone three paleo-polyploidy events5: a paleohexaploidy (γ) event shared with most dicots (asterids and rosids) and two paleotetraploidy events (β then α) shared with other members of the order Brassicales. B. rapa shares this complex history but with the addition of a whole-genome triplication (WGT) thought to have occurred between 13 and 17 million years ago (MYA)6, 7, making 'mesohexaploidy' a characteristic of the Brassiceae tribe of the Brassicaceae8.
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