Genetic Diversity and Population Structure of the Rice False Smut Pathogen Ustilaginoidea virens in the Sichuan-Chongqing Region

Rice false smut caused by Ustilaginoidea virens is one of the most devastating fungal diseases of rice panicles worldwide. In this study, two novel molecular markers derived from single nucleotide polymorphism-rich genomic DNA fragments and a previously reported molecular marker were used for analyz...

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Veröffentlicht in:Plant disease. - 1997. - 106(2022), 1 vom: 02. Jan., Seite 93-100
1. Verfasser: Fang, Anfei (VerfasserIn)
Weitere Verfasser: Fu, Zhuangyuan, Wang, Zexiong, Fu, Yuhang, Qin, Yubao, Bai, Zhenxu, Tan, Ze, Cai, Junsong, Yang, Yuheng, Yu, Yang, Sun, Wenxian, Bi, Chaowei
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2022
Zugriff auf das übergeordnete Werk:Plant disease
Schlagworte:Journal Article SNP markers Ustilaginoidea virens genetic variation geographical populations
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520 |a Rice false smut caused by Ustilaginoidea virens is one of the most devastating fungal diseases of rice panicles worldwide. In this study, two novel molecular markers derived from single nucleotide polymorphism-rich genomic DNA fragments and a previously reported molecular marker were used for analyzing the genetic diversity and population structure of 167 U. virens isolates collected from nine areas in the Sichuan-Chongqing region, China. A total of 62 haplotypes were identified, and a few haplotypes with high frequency were found and distributed in two to three areas, suggesting gene flow among different geographical populations. All isolates were divided into six genetic groups. Groups I and VI were the largest, with 61 and 48 isolates, respectively. The pairwise FST values showed significant genetic differentiation among all compared geographical populations. Analysis of molecular variance showed that intergroup genetic variation accounted for 40.17% of the total genetic variation, while 59.83% of genetic variation came from intragroup genetic variation. The unweighted pair-group method with arithmetic means dendrogram and population structure revealed that the genetic composition of isolates collected from Santai, Nanchong, Yongchuan, and Wansheng dominated by the same genetic subgroup was different from those collected from other areas. In addition, genetic recombination was found in a few isolates. These findings will help to improve the strategies for rice false smut management and resistance breeding, such as evaluating breeding lines with different isolates or haplotypes at different elevations and landforms 
650 4 |a Journal Article 
650 4 |a SNP markers 
650 4 |a Ustilaginoidea virens 
650 4 |a genetic variation 
650 4 |a geographical populations 
700 1 |a Fu, Zhuangyuan  |e verfasserin  |4 aut 
700 1 |a Wang, Zexiong  |e verfasserin  |4 aut 
700 1 |a Fu, Yuhang  |e verfasserin  |4 aut 
700 1 |a Qin, Yubao  |e verfasserin  |4 aut 
700 1 |a Bai, Zhenxu  |e verfasserin  |4 aut 
700 1 |a Tan, Ze  |e verfasserin  |4 aut 
700 1 |a Cai, Junsong  |e verfasserin  |4 aut 
700 1 |a Yang, Yuheng  |e verfasserin  |4 aut 
700 1 |a Yu, Yang  |e verfasserin  |4 aut 
700 1 |a Sun, Wenxian  |e verfasserin  |4 aut 
700 1 |a Bi, Chaowei  |e verfasserin  |4 aut 
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