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首页> 外文期刊>Applied Microbiology >Genomic Analysis of Xanthomonas oryzae Isolates from Rice Grown in the United States Reveals Substantial Divergence from Known X. oryzae Pathovars
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Genomic Analysis of Xanthomonas oryzae Isolates from Rice Grown in the United States Reveals Substantial Divergence from Known X. oryzae Pathovars

机译：从美国种植的稻米中分离出的黄单胞菌的基因组分析揭示了与已知的X. oryzae Pathovars的巨大差异

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摘要

The species Xanthomonas oryzae is comprised of two designated pathovars, both of which cause economically significant diseases of rice in Asia and Africa. Although X. oryzae is not considered endemic in the United States, an X. oryzae -like bacterium was isolated from U.S. rice and southern cutgrass in the late 1980s. The U.S. strains were weakly pathogenic and genetically distinct from characterized X. oryzae pathovars. In the current study, a draft genome sequence from two U.S. Xanthomonas strains revealed that the U.S. strains form a novel clade within the X. oryzae species, distinct from all strains known to cause significant yield loss. Comparative genome analysis revealed several putative gene clusters specific to the U.S. strains and supported previous reports that the U.S. strains lack transcriptional activator-like (TAL) effectors. In addition to phylogenetic and comparative analyses, the genome sequence was used for designing robust U.S. strain-specific primers, demonstrating the usefulness of a draft genome sequence in the rapid development of diagnostic tools.
机译：米氏黄单胞菌（Xanthomonas oryzae）物种由两个指定的病原体组成，它们均在亚洲和非洲引起水稻的经济上重大疾病。尽管在美国不认为米曲霉是地方性的，但在1980年代末从美国稻米和南部的茅草中分离出了米曲霉样细菌。美国菌株的致病力很弱，并且在遗传上不同于米曲霉致病菌。在当前的研究中，来自两个美国黄单胞菌菌株的基因组序列草案显示，美国菌株在米曲霉菌种内形成了一个新的进化枝，与所有已知的引起显着产量损失的菌株不同。比较基因组分析揭示了几个特定于美国菌株的推定基因簇，并支持以前的报道，即美国菌株缺乏转录激活物样（TAL）效应子。除了系统发育分析和比较分析外，该基因组序列还用于设计鲁棒的美国菌株特异性引物，证明了基因组序列草图在诊断工具快速开发中的有用性。

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