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Wei S, Liu L, Chen G, Yang H, Huang L, Gong G, Luo P, Zhang M. Molecular evolution and phylogeographic analysis of wheat dwarf virus. Front Microbiol 2024; 15:1314526. [PMID: 38419641 PMCID: PMC10901289 DOI: 10.3389/fmicb.2024.1314526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 01/23/2024] [Indexed: 03/02/2024] Open
Abstract
Wheat dwarf virus (WDV) has caused considerable economic loss in the global production of grain crops. Knowledge of the evolutionary biology and population history of the pathogen remain poorly understood. We performed molecular evolution and worldwide phylodynamic analyses of the virus based on the genes in the protein-coding region of the entire viral genome. Our results showed that host-driven and geography-driven adaptation are major factors that affects the evolution of WDV. Bayesian phylogenetic analysis estimates that the average WDV substitution rate was 4.240 × 10-4 substitutions/site/year (95% credibility interval, 2.828 × 10-4-5.723 × 10-4), and the evolutionary rates of genes encoding proteins with virion-sense transcripts and genes encoding proteins with complementary-sense transcripts were different. The positively selected sites were detected in only two genes encoding proteins with complementary-sense, and WDV-barley are subject to stronger purifying selection than WDV-wheat. The time since the most recent common WDV ancestor was 1746 (95% credibility interval, 1517-1893) CE. Further analyses identified that the WDV-barley population and WDV-wheat population experienced dramatic expansion-decline episodes, and the expansion time of the WDV-barley population was earlier than that of the WDV-wheat population. Our phylogeographic analysis showed that the WDV population originating in Iran was subsequently introduced to Europe, and then spread from Eastern Europe to China.
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Affiliation(s)
- Shiqing Wei
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Linwen Liu
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Guoliang Chen
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Hui Yang
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Liang Huang
- State Key Laboratory for the Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Guoshu Gong
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - PeiGao Luo
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Min Zhang
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
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Hao X, Wang L, Zhang X, Zhong Q, Hajano JUD, Xu L, Wu Y. A Real-Time Loop-Mediated Isothermal Amplification for Detection of the Wheat Dwarf Virus in Wheat and the Insect Vector Psammotettix alienus. Plant Dis 2021; 105:4113-4120. [PMID: 34003037 DOI: 10.1094/pdis-10-20-2279-re] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Wheat dwarf virus (WDV; genus Mastrevirus, family Geminiviridae) is an economically important and widespread pathogen of cereal crops. It causes huge yield loss in wheat because of the unavailability of resistant varieties and rapid transmission by the vector leafhopper, Psammotettix alienus (Dahlb). To monitor and forecast this viral disease, an early diagnosis method is required for WDV detection in both infected plants and the virus vectors. In this study, we developed a real-time loop-mediated isothermal amplification (LAMP) assay for WDV detection. The positive sample could be detected within 28 to 32 min by following a simple, cost-effective procedure. The real-time LAMP assay showed a sensitivity of 2.7 × 105-6 copies/μl for detection and a high specificity for WDV amplification, with a similar accuracy to quantitative PCR. Furthermore, a closed-tube dye method facilitates the inspection of the LAMP reaction and avoids cross-contamination in the detection of the virus. This valuable detection assay could serve as an important tool for diagnosis and forecasting wheat dwarf disease intensity in the field.
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Affiliation(s)
- Xingan Hao
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, China
| | - Licheng Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, China
| | - Xudong Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, China
| | - Qinrong Zhong
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, China
| | - Jamal-U-Ddin Hajano
- Department of Plant Pathology, Faculty of Crop Protection, Sindh Agriculture University, Tandojam 70060, Pakistan
| | - Liangsheng Xu
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, China
| | - Yunfeng Wu
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, China
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Lawrenson T, Hinchliffe A, Clarke M, Morgan Y, Harwood W. In-planta Gene Targeting in Barley Using Cas9 With and Without Geminiviral Replicons. Front Genome Ed 2021; 3:663380. [PMID: 34713258 PMCID: PMC8525372 DOI: 10.3389/fgeed.2021.663380] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 04/29/2021] [Indexed: 11/13/2022] Open
Abstract
Advances in the use of RNA-guided Cas9-based genome editing in plants have been rapid over the last few years. A desirable application of genome editing is gene targeting (GT), as it allows a wide range of precise modifications; however, this remains inefficient especially in key crop species. Here, we describe successful, heritable gene targeting in barley at the target site of Cas9 using an in-planta strategy but fail to achieve the same using a wheat dwarf virus replicon to increase the copy number of the repair template. Without the replicon, we were able to delete 150 bp of the coding sequence of our target gene whilst simultaneously fusing in-frame mCherry in its place. Starting from 14 original transgenic plants, two plants appeared to have the required gene targeting event. From one of these T0 plants, three independent gene targeting events were identified, two of which were heritable. When the replicon was included, 39 T0 plants were produced and shown to have high copy numbers of the repair template. However, none of the 17 lines screened in T1 gave rise to significant or heritable gene targeting events despite screening twice the number of plants in T1 compared with the non-replicon strategy. Investigation indicated that high copy numbers of repair template created by the replicon approach cause false-positive PCR results which are indistinguishable at the sequence level to true GT events in junction PCR screens widely used in GT studies. In the successful non-replicon approach, heritable gene targeting events were obtained in T1, and subsequently, the T-DNA was found to be linked to the targeted locus. Thus, physical proximity of target and donor sites may be a factor in successful gene targeting.
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Affiliation(s)
- Tom Lawrenson
- John Innes Centre, Norwich Research Park, Norwich, United Kingdom
| | | | - Martha Clarke
- John Innes Centre, Norwich Research Park, Norwich, United Kingdom
| | - Yvie Morgan
- John Innes Centre, Norwich Research Park, Norwich, United Kingdom
| | - Wendy Harwood
- John Innes Centre, Norwich Research Park, Norwich, United Kingdom
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Kis A, Hamar É, Tholt G, Bán R, Havelda Z. Creating highly efficient resistance against wheat dwarf virus in barley by employing CRISPR/Cas9 system. Plant Biotechnol J 2019; 17:1004-1006. [PMID: 30633425 PMCID: PMC6523583 DOI: 10.1111/pbi.13077] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 12/04/2018] [Accepted: 12/31/2018] [Indexed: 05/18/2023]
Affiliation(s)
- András Kis
- National Agricultural Research and Innovation CentreAgricultural Biotechnology InstituteGödöllőHungary
| | - Éva Hamar
- National Agricultural Research and Innovation CentreAgricultural Biotechnology InstituteGödöllőHungary
- Georgikon FacultyFestetics Doctoral SchoolUniversity of PannoniaKeszthelyHungary
| | - Gergely Tholt
- Plant Protection InstituteCentre for Agricultural ResearchHungarian Academy of SciencesBudapestHungary
- Department of Systematic Zoology and EcologyFaculty of ScienceInstitute of BiologyEötvös Loránd UniversityBudapestHungary
| | - Rita Bán
- Plant Protection InstituteFaculty of Agricultural and Environmental SciencesSzent István UniversityGödöllőHungary
| | - Zoltán Havelda
- National Agricultural Research and Innovation CentreAgricultural Biotechnology InstituteGödöllőHungary
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Derlink M, Abt I, Mabon R, Julian C, Virant-Doberlet M, Jacquot E. Mating behavior of Psammotettix alienus (Hemiptera: Cicadellidae). Insect Sci 2018; 25:148-160. [PMID: 27450152 DOI: 10.1111/1744-7917.12379] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 07/04/2016] [Indexed: 06/06/2023]
Abstract
The Wheat dwarf virus, the causal agent of the wheat dwarf disease, is transmitted by leafhoppers from the genus Psammotettix and currently the main protection strategy is based on the use of insecticide treatments. Sustainable management strategies for insect vectors should include methods that are targeted to disrupt reproductive behavior and here we investigated the mating behavior of Psammotettix alineus (Dahlbom 1850) in order to determine the role of vibrational signals in intra-specific communication and pair formation. Both genders spontaneously emit species- and sex-specific calling songs that consisted of regularly repeated pulse trains and differ primarily in pulse train duration and pulse repetition time. Females preferred the conspecific male calling song. After a coordinated exchange of pulse trains, the male approached the stationary female. During the close range courtship and also immediately prior to copulatory attempts distinct male vibrational signals associated with wing flapping and wing vibrations were recorded from the substrate. In the presence of a receptive female, competing males emitted vibrational signals most likely aimed to interfere with male-female interaction. Mated females regained sexual receptivity after they laid eggs. Although results suggest that the viruliferous status of insects may have an effect on vibrational songs, our current results did not reveal a significant effect of virus on leafhopper performance in mating behavior. However, this study also suggests, that detailed understanding of plant-vector-virus interactions relevant for vector mating behavior is essential for trying new approaches in developing future control practices against plant viruses transmitted by insect vectors.
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Affiliation(s)
- Maja Derlink
- Department of Organisms and Ecosystems Research, National Institute of Biology, Večna pot 111, 1000, Ljubljana, Slovenia
| | - Isabelle Abt
- INRA-Cirad-Montpellier SupAgro, UMR 385 BGPI, Cirad TA A-54K, 34398, Montpellier, France
- Bayer CropScience, 16 rue Jean Marie Leclair - CS 90106, 69266 Lyon Cedex 09, France
| | - Romain Mabon
- INRA-Cirad-Montpellier SupAgro, UMR 385 BGPI, Cirad TA A-54K, 34398, Montpellier, France
- Bayer CropScience, 16 rue Jean Marie Leclair - CS 90106, 69266 Lyon Cedex 09, France
| | - Charlotte Julian
- INRA-Cirad-Montpellier SupAgro, UMR 385 BGPI, Cirad TA A-54K, 34398, Montpellier, France
- Bayer CropScience, 16 rue Jean Marie Leclair - CS 90106, 69266 Lyon Cedex 09, France
| | - Meta Virant-Doberlet
- Department of Organisms and Ecosystems Research, National Institute of Biology, Večna pot 111, 1000, Ljubljana, Slovenia
| | - Emmanuel Jacquot
- INRA-Cirad-Montpellier SupAgro, UMR 385 BGPI, Cirad TA A-54K, 34398, Montpellier, France
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