A genome-wide survey with different rapeseed ecotypes uncovers footprints of domestication and breeding.
A genome-wide survey with different rapeseed ecotypes uncovers footprints of domestication and breeding.
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对不同油菜籽生态型的全基因组调查揭示了驯化和育种的足迹
DOI：
10.1093/jxb/erx311
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发表时间：
2017-10-13
影响因子：
6.9
通讯作者：
Qian W
中科院分区：
文献类型：
--
作者：
Wei D;Cui Y;He Y;Xiong Q;Qian L;Tong C;Lu G;Ding Y;Li J;Jung C;Qian W
在198个选择性扫描中，我们发现了与环境适应性和产量相关性状相关的功能基因或位点，如FT和抗性。油菜（Brassica napus L.）是重要的油料作物。尽管驯化和育种时间很短，但油菜已经形成了三个不同的生态型群，即春季，冬季和半冬季。然而，这三个生态型群体之间的遗传变化在很大程度上仍然未知。为了检测选择性信号，使用芸苔属阵列对来自世界各地的327份材料进行基因型分析，产生33186个高质量的单核苷酸多态性（SNP）。连锁不平衡（LD）在基因组中分布不均匀。在A亚基因组中共发现705个（78.2%）弱LD区域，而在C亚基因组中发现445个（72.6%）强LD区域。通过计算核苷酸多样性和群体分化指数，共198个选择性扫描确定跨生态型组，跨越5.91%（37.9 Mb）的基因组。在这些基因组区域内，发现一些已知的功能基因或位点与环境适应性和产量相关性状相关。特别是，所有12个SNPs检测到显着关联的开花时间之间加入生态型组之间的选择区域。这些发现提供了对B结构的新见解。napus基因组，揭示驯化和育种的足迹。
In 198 selective sweeps we found functional genes or loci, such as FT and resistance, associated with environmental adaptability and yield-related traits. Rapeseed (Brassica napus L.) is an important oilseed crop. Despite a short period of domestication and breeding, rapeseed has formed three diverse ecotype groups, namely spring, winter, and semi-winter. However, the genetic changes among the three ecotype groups have remained largely unknown. To detect selective signals, a set of 327 accessions from a worldwide collection were genotyped using a Brassica array, producing 33 186 high-quality single nucleotide polymorphisms (SNPs). Linkage disequilibrium (LD) was unevenly distributed across the genome. A total of 705 (78.2%) weak LD regions were found in the A subgenome, whereas 445 (72.6%) strong LD regions were in the C subgenome. By calculating the nucleotide diversity and population differentiation indices, a total of 198 selective sweeps were identified across ecotype groups, spanning 5.91% (37.9 Mb) of the genome. Within these genome regions, a few known functional genes or loci were found to be in association with environmental adaptability and yield-related traits. In particular, all 12 SNPs detected in significant association with flowering time among accessions were in the selection regions between ecotype groups. These findings provide new insights into the structure of the B. napus genome and uncover the footprints of domestication and breeding.
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影响因子：
7.2
作者：
Alcázar, R;García-Martínez, JL;Altabella, T
通讯作者：
Altabella, T
影响因子：
4.4
作者：
Delourme R;Falentin C;Fomeju BF;Boillot M;Lassalle G;André I;Duarte J;Gauthier V;Lucante N;Marty A;Pauchon M;Pichon JP;Ribière N;Trotoux G;Blanchard P;Rivière N;Martinant JP;Pauquet J
通讯作者：
Pauquet J
影响因子：
5.8
作者：
Bradbury, Peter J.;Zhang, Zhiwu;Buckler, Edward S.
通讯作者：
Buckler, Edward S.
影响因子：
7
作者：
Kielbasa, Szymon M.;Wan, Raymond;Frith, Martin C.
通讯作者：
Frith, Martin C.
影响因子：
5.4
作者：
Bus, Anja;Koerber, Niklas;Stich, Benjamin
通讯作者：
Stich, Benjamin