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首页> 外文期刊>European journal of nutrition >Origin of rice (Oryza sativa L.) domestication genes
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Origin of rice (Oryza sativa L.) domestication genes

机译：稻米的起源（Oryza sativa L.）驯化基因

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摘要

A number of genes that contribute to the domestication traits of cultivated rice have been identified. These include Sh4, Rc, PROG1 and LABA1, which are associated with non-shattering rachis, white pericarp, erect growth and barbless awns, respectively. The mutations giving rise to the "domestication alleles" of these genes are either invariable in cultivated rice, or have variability that is strictly associated with the phenotypic trait. This observation forms the basis to those current rice domestication models that envisage a single origin for the domesticated phenotype. Such models assume that the domestication alleles are absent or rare in wild rice, emerged under cultivation and spread across all rice groups by introgressive hybridization. We examined whole-genome sequencing datasets for wild and cultivated rice to test the former two assumptions. We found that the rc and laba1 alleles occur in wild rice with broad geographical distribution, and reach frequencies as high as 13 and 15%, respectively. These results are in agreement with previous observations of the prog1 and sh4 domestication alleles in wild populations. We also show that the diversity of the genomic regions surrounding the rc, laba1, prog1 and sh4 alleles in wild accessions is greater than that in cultivated rice, suggesting that these alleles emerged prior to domestication. Our findings indicate that the possibility that independent rice groups obtained identical domestication alleles directly from the wild population needs to be considered.
机译：已经确定了许多有助于培养水稻驯化性状的基因。这些包括SH4，RC，PROG1和LABA1，其与非破碎的绞痛，白色PERICARP，直立生长和Barbless AWN相关联。产生这些基因的“驯化等位基因”的突变在培养的水稻中是不稳定的，或具有与表型特性严格相关的可变性。该观察结果构成了当前稻米驯化模型的基础，该模型设想驯化表型的单一来源。这些模型假设销售等位基因在野生稻中不存在或罕见，在培养下出现并通过渗出杂交来涂抹在所有水稻。我们检查了野生和栽培的米饭的全基因组测序数据集，以测试前两个假设。我们发现RC和Laba1等位基因在具有广泛的地理分布的野生米中，分别达到高达13和15％的频率。这些结果与野生种群中的PROG1和SH4驯化等位基因的先前观察一致。我们还表明，在野生载体中围绕RC，Laba1，Prog1和SH4等位基因周围的基因组区域的多样性大于培养米的植物，表明这些等位基因在驯化前出现。我们的研究结果表明，独立稻米群体的可能性需要考虑直接从野生人群获得相同的归际型号。

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