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Comparative Study
. 2011 Aug 28;43(10):1035-9.
doi: 10.1038/ng.919.

The Genome of the Mesopolyploid Crop Species Brassica Rapa

Xiaowu Wang  1 Hanzhong WangJun WangRifei SunJian WuShengyi LiuYinqi BaiJeong-Hwan MunIan BancroftFeng ChengSanwen HuangXixiang LiWei HuaJunyi WangXiyin WangMichael FreelingJ Chris PiresAndrew H PatersonBoulos ChalhoubBo WangAlice HaywardAndrew G SharpeBeom-Seok ParkBernd WeisshaarBinghang LiuBo LiBo LiuChaobo TongChi SongChristopher DuranChunfang PengChunyu GengChushin KohChuyu LinDavid EdwardsDesheng MuDi ShenEleni SoumpourouFei LiFiona FraserGavin ConantGilles LassalleGraham J KingGuusje BonnemaHaibao TangHaiping WangHarry BelcramHeling ZhouHideki HirakawaHiroshi AbeHui GuoHui WangHuizhe JinIsobel A P ParkinJacqueline BatleyJeong-Sun KimJérémy JustJianwen LiJiaohui XuJie DengJin A KimJingping LiJingyin YuJinling MengJinpeng WangJiumeng MinJulie PoulainJun WangKatsunori HatakeyamaKui WuLi WangLu FangMartin TrickMatthew G LinksMeixia ZhaoMina JinNirala RamchiaryNizar DrouPaul J BerkmanQingle CaiQuanfei HuangRuiqiang LiSatoshi TabataShifeng ChengShu ZhangShujiang ZhangShunmou HuangShusei SatoSilong SunSoo-Jin KwonSu-Ryun ChoiTae-Ho LeeWei FanXiang ZhaoXu TanXun XuYan WangYang QiuYe YinYingrui LiYongchen DuYongcui LiaoYongpyo LimYoshihiro NarusakaYupeng WangZhenyi WangZhenyu LiZhiwen WangZhiyong XiongZhonghua ZhangBrassica rapa Genome Sequencing Project Consortium
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Comparative Study

The Genome of the Mesopolyploid Crop Species Brassica Rapa

Xiaowu Wang et al. Nat Genet. .

Abstract

We report the annotation and analysis of the draft genome sequence of Brassica rapa accession Chiifu-401-42, a Chinese cabbage. We modeled 41,174 protein coding genes in the B. rapa genome, which has undergone genome triplication. We used Arabidopsis thaliana as an outgroup for investigating the consequences of genome triplication, such as structural and functional evolution. The extent of gene loss (fractionation) among triplicated genome segments varies, with one of the three copies consistently retaining a disproportionately large fraction of the genes expected to have been present in its ancestor. Variation in the number of members of gene families present in the genome may contribute to the remarkable morphological plasticity of Brassica species. The B. rapa genome sequence provides an important resource for studying the evolution of polyploid genomes and underpins the genetic improvement of Brassica oil and vegetable crops.

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