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Zhou Y, Chaisiri C, Luo M, Fan F, Wang YF, Yin LF, Yin WX, Luo CX. Genetic diversity of Venturia carpophila populations from different hosts and geographic regions in China. Front Microbiol 2022; 13:985691. [PMID: 36590415 PMCID: PMC9800423 DOI: 10.3389/fmicb.2022.985691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 12/01/2022] [Indexed: 12/23/2022] Open
Abstract
Venturia carpophila, the causal agent of scab disease of peach, mume, and apricot, is widely distributed around the world. Scab of stone fruits is an important disease in China. However, little is known about the population biology and genetic diversity of the V. carpophila. To better understand the genetic diversity and population structure of V. carpophila, 186 single-spore isolates from different hosts and geographic regions were obtained and analyzed by using 31 simple sequence repeat (SSR) markers. This included 156 isolates from peach spanning 14 provinces, 15 isolates from mume and 15 isolates from apricot in Huazhong Agricultural University (HZAU). Diversity analysis with SSR markers showed a low incidence of polymorphisms within mume isolates (32.59% of markers), but a higher incidence of polymorphisms within peach isolates (42.96%) and apricot isolates (57.04%). Within peach isolates, Nei's average gene diversity ranged from 0.07 for Hebei population to 0.18 for Hubei population. AMOVA analysis revealed that 13% of the observed genetic diversity was partitioned among the geographic populations, while 40% of the observed genetic diversity was partitioned among the host populations. Other analyses (PCoA, STRUCTURE, DAPC, MSN, and UPGMA) indicated that the Chinese V. carpophila populations could be clustered into three distinct genetic groups, which correspond to the host boundaries of peach, mume and apricot. The genetic identity of V. carpophila isolates throughout the range is dependent on hosts, but not geographic regions.
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Affiliation(s)
- Yang Zhou
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, China,Key Lab of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan, China,College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Chingchai Chaisiri
- Key Lab of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan, China,College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Mei Luo
- Key Lab of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan, China,College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Fei Fan
- Key Lab of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan, China,College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Yu-Fu Wang
- Key Lab of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan, China,College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Liang-Fen Yin
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China,Experimental Teaching Center of Crop Science, Huazhong Agricultural University, Wuhan, China
| | - Wei-Xiao Yin
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China,Hubei Key Laboratory of Plant Pathology, Huazhong Agricultural University, Wuhan, China
| | - Chao-Xi Luo
- Key Lab of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan, China,College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China,Hubei Key Laboratory of Plant Pathology, Huazhong Agricultural University, Wuhan, China,*Correspondence: Chao-Xi Luo,
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Fu R, Chen C, Wang J, Liu Y, Zhao L, Lu D. Diversity Analysis of the Rice False Smut Pathogen Ustilaginoidea virens in Southwest China. J Fungi (Basel) 2022; 8:1204. [PMID: 36422026 PMCID: PMC9694781 DOI: 10.3390/jof8111204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 11/10/2022] [Accepted: 11/12/2022] [Indexed: 04/10/2024] Open
Abstract
Rice false smut caused by Ustilaginoidea virens is a destructive disease in rice cropping areas of the world. The present study is focused on the morphology, pathogenicity, mating-type loci distribution, and genetic characterization of different isolates of U. virens. A total of 221 strains of U. virens were collected from 13 rice-growing regions in southwest China. The morphological features of these strains exhibited high diversity, and the pathogenicity of the smut fungus showed significant differentiation. There was no correlation between pathogenicity and sporulation. Mating-type locus (MAT) analysis revealed that all 221 isolates comprised heterothallic and homothallic forms, wherein 204 (92.31%) and 17 (7.69%) isolates belonged to heterothallic and homothallic mating types, respectively. Among 204 strains of heterothallic mating types, 62 (28.05%) contained MAT1-1-1 idiomorphs, and 142 isolates (64.25%) had the MAT1-2-1 idiomorph. Interestingly, strains isolated from the same fungus ball had different mating types. The genetic structure of the isolates was analyzed using simple sequence repeats (SSRs) and single-nucleotide polymorphisms (SNPs). All isolates were clustered into five genetic groups. The values of Nei's gene diversity (H) and Shannon's information index (I) indicated that all strains as a group had higher genetic diversity than strains from a single geographical population. The pairwise population fixation index (FST) values also indicated significant genetic differentiation among all compared geographical populations. The analysis of molecular variation (AMOVA) indicated greater genetic variation within individual populations and less genetic variation among populations. The results showed that most of the strains were not clustered according to their geographical origin, showing the rich genetic diversity and the complex and diverse genetic background of U. virens in southwest China. These results should help to better understand the biological and genetic diversity of U. virens in southwest China and provide a theoretical basis for building effective management strategies.
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Affiliation(s)
- Rongtao Fu
- Institute of Plant Protection, Sichuan Academy of Agricultural Science, 20# Jingjusi Rd., Chengdu 610066, China
- Key Laboratory of Integrated Pest Management on Crops in Southwest, Ministry of Agriculture, Chengdu 610066, China
| | - Cheng Chen
- Institute of Plant Protection, Sichuan Academy of Agricultural Science, 20# Jingjusi Rd., Chengdu 610066, China
- Key Laboratory of Integrated Pest Management on Crops in Southwest, Ministry of Agriculture, Chengdu 610066, China
| | - Jian Wang
- Institute of Plant Protection, Sichuan Academy of Agricultural Science, 20# Jingjusi Rd., Chengdu 610066, China
- Key Laboratory of Integrated Pest Management on Crops in Southwest, Ministry of Agriculture, Chengdu 610066, China
| | - Yao Liu
- Crop Research Institute, Sichuan Academy of Agricultural Science, Chengdu 610066, China
| | - Liyu Zhao
- Institute of Plant Protection, Sichuan Academy of Agricultural Science, 20# Jingjusi Rd., Chengdu 610066, China
| | - Daihua Lu
- Institute of Plant Protection, Sichuan Academy of Agricultural Science, 20# Jingjusi Rd., Chengdu 610066, China
- Key Laboratory of Integrated Pest Management on Crops in Southwest, Ministry of Agriculture, Chengdu 610066, China
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