Facility Horticulture Laboratory of Universities in Shandong, Weifang University of Science and Technology, Weifang 262700, China.
Department of Plant Pathology, China Agricultural University, Beijing 100193, China.
Genes (Basel). 2021 Oct 27;12(11):1712. doi: 10.3390/genes12111712.
Wheat stripe rust, caused by the fungal pathogen f. sp. (), is a destructive wheat disease in China. The Gansu-Ningxia region (GN) is a key area for pathogen over-summering in China, and northwestern Hubei (HB) is an important region for pathogen over-wintering, serving as a source of inoculum in spring epidemic regions. The spatiotemporal population genetic structure of in HB and the pathogen population exchanges between GN and HB are important for estimating the risk of interregional epidemics. Here, 567 isolates from GN and HB were sampled from fall 2016 to spring 2018 and were genotyped using simple sequence repeat markers. The genotypic and genetic diversity of subpopulations in HB varied among seasons and locations. Greater genetic diversification levels were found in the spring compared with fall populations using principal coordinate analysis and Bayesian assignments. In total, there were 17 common genotypes among the 208 determined, as shown by a small overlap of genotypes in the principal coordinate analysis and dissimilar Bayesian assignments in both regions, which revealed the limited genotype exchange between the populations of GN and HB.
小麦条锈病由真菌病原体 f. sp. ()引起，是中国一种具有破坏性的小麦病害。甘肃-宁夏（GN）地区是中国病菌越冬的关键地区，而湖北西北部（HB）是病菌越夏的重要地区，是春季流行地区的接种体来源。HB 中 的时空种群遗传结构以及 GN 和 HB 之间的病菌种群交换对于估计区域间流行的风险很重要。在这里，2016 年秋季至 2018 年春季从 GN 和 HB 采集了 567 个分离株，并使用简单重复序列标记进行了基因型分析。HB 中 的亚种群在不同季节和地点的基因型和遗传多样性存在差异。主坐标分析和贝叶斯分配显示，与秋季种群相比，春季种群的遗传分化水平更高。在总共确定的 208 个基因型中，有 17 个是共有基因型，这表明主坐标分析中基因型的重叠较小，而两个地区的贝叶斯分配则不同，这表明 GN 和 HB 之间的种群基因型交换有限。
