Faculty of Life and Environmental Sciences, Prefectural University of Hiroshima.
Jember University.
Genes Genet Syst. 2020 Oct 23;95(4):191-199. doi: 10.1266/ggs.20-00011. Epub 2020 Oct 1.
To elucidate the diversity and evolution of the Si7PPO gene that controls phenol color reaction (Phr) in foxtail millet, Setaria italica, we analyzed sequence polymorphisms of the Si7PPO gene in 39 accessions consisting of foxtail millet landraces (32 accessions) and their wild ancestor ssp. viridis (seven accessions) collected from various regions in Europe and Asia. The accessions included wild type (positive Phr) and three different types of loss-of-function phenotype (negative Phr), "stop codon type", "TE1-insertion type" and "6-bp duplication type", found in our previous study. We constructed a phylogenetic tree of the gene and found that accessions with positive Phr showed higher genetic diversity at the nucleotide sequence level. We also found that the three different loss-of-function types formed different clusters, suggesting that landraces with negative Phr have multiple origins from three different lineages including both landrace and ssp. viridis accessions with positive Phr.
为了阐明控制谷子酚红反应(Phr)的 Si7PPO 基因的多样性和进化,我们分析了来自欧洲和亚洲不同地区的 39 个谷子品种(32 个品种)及其野生祖先 ssp. viridis(7 个品种)中 Si7PPO 基因的序列多态性。这些品种包括野生型(阳性 Phr)和我们之前研究中发现的三种不同的功能丧失表型(阴性 Phr),“终止密码子类型”、“TE1 插入类型”和“6-bp 重复类型”。我们构建了基因的系统发育树,发现阳性 Phr 的品种在核苷酸序列水平上表现出更高的遗传多样性。我们还发现,三种不同的功能丧失类型形成了不同的聚类,表明阴性 Phr 的品种可能来自于三个不同的谱系,包括具有阳性 Phr 的品种和 ssp. viridis 品种。