The grapevine genome sequence suggests ancestral hexaploidization in major angiosperm phyla
The grapevine genome sequence suggests ancestral hexaploidization in major angiosperm phyla
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DOI：
10.1038/nature06148
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发表时间：
2007-09-27
期刊：
影响因子：
64.8
通讯作者：
Wincker, Patrick
中科院分区：
文献类型：
--
作者：
Jaillon, Olivier;Aury, Jean-Marc;Wincker, Patrick
对第一批植物基因组的分析提供了意想不到的证据，证明在以前根据其遗传学被认为是真正的二倍体的物种中存在基因组复制事件（1-3）。这些多倍体化事件可能对植物进化产生重要影响，特别是对物种的辐射和适应以及功能能力的调节（4-10）。在这里，我们报告了从一个高度纯合的基因型中获得的葡萄（Vitis vinifera）基因组序列的高质量草图。葡萄藤基因组的草图序列是迄今为止第四个针对开花植物的基因组序列，第二个针对木本植物的基因组序列，第一个针对水果作物的基因组序列（种植水果和饮料）。葡萄藤被选中是因为它在新石器时代人类文化遗产中的重要地位（11）。几个在芳香特征中起作用的基因家族的大扩展被观察到。葡萄藤基因组没有经历最近的基因组复制，因此能够发现祖先的性状和开花植物遗传组织的特征。这一分析揭示了三个祖先基因组对葡萄藤单倍体含量的贡献。这种祖先的排列在许多双子叶植物中是常见的，但在水稻的基因组中却没有，水稻是单子叶植物。此外，我们还解释了开花植物进化中先前描述的全基因组复制事件的年表。
The analysis of the first plant genomes provided unexpected evidence for genome duplication events in species that had previously been considered as true diploids on the basis of their genetics(1-3). These polyploidization events may have had important consequences in plant evolution, in particular for species radiation and adaptation and for the modulation of functional capacities(4-10). Here we report a high-quality draft of the genome sequence of grapevine (Vitis vinifera) obtained from a highly homozygous genotype. The draft sequence of the grapevine genome is the fourth one produced so far for flowering plants, the second for a woody species and the first for a fruit crop ( cultivated for both fruit and beverage). Grapevine was selected because of its important place in the cultural heritage of humanity beginning during the Neolithic period(11). Several large expansions of gene families with roles in aromatic features are observed. The grapevine genome has not undergone recent genome duplication, thus enabling the discovery of ancestral traits and features of the genetic organization of flowering plants. This analysis reveals the contribution of three ancestral genomes to the grapevine haploid content. This ancestral arrangement is common to many dicotyledonous plants but is absent from the genome of rice, which is a monocotyledon. Furthermore, we explain the chronology of previously described whole-genome duplication events in the evolution of flowering plants.