Characterisation of Wheat dwarf virus isolates from the vector Psammotettix alienus
Wheat dwarf disease caused by Wheat dwarf virus (WDV) can cause a lot of damage in wheat fields by reduction of yield. WDV belongs to the genus Mastrevirus in the family of Geminiviridae and it is transmitted by the leafhopper Psammotettix alienus. Viruses in the genus Mastrevirus have a genome of...
| Autor principal: | |
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| Formato: | First cycle, G2E |
| Lenguaje: | sueco Inglés |
| Publicado: |
2014
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| Acceso en línea: | https://stud.epsilon.slu.se/6436/ |
| _version_ | 1855571010324004864 |
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| author | Lidemalm, Louise |
| author_browse | Lidemalm, Louise |
| author_facet | Lidemalm, Louise |
| author_sort | Lidemalm, Louise |
| collection | Epsilon Archive for Student Projects |
| description | Wheat dwarf disease caused by Wheat dwarf virus (WDV) can cause a lot of damage in wheat fields by reduction of yield. WDV belongs to the genus Mastrevirus in the family of
Geminiviridae and it is transmitted by the leafhopper Psammotettix alienus. Viruses in the genus Mastrevirus have a genome of single-stranded (ss) circular DNA ranging in size from 2.6 kb – 2.8 kb. Mastreviruses have monopartite genomes with three genes: a movement protein (MP) gene, coat protein (CP) gene, and Rep. Replication-associated protein (Rep) and replication-associated protein A (RepA) are both translated from Rep, but from two different
mRNAs. For Rep, an intron has been spliced out, while for RepA the intron has been kept. The aim of this study was to see if the WDV isolates from samples collected in Skåne,
Sweden during 2010 was a new genotype, by analysing the DNA sequences. The samples from Skåne were of interest because for many years there have been no records of wheat
dwarf disease in Skåne. The hypothesis was that there was no new genotype of WDV and thus, that no recombination have occurred. To test the hypothesis DNA was extracted from
leafhoppers collected at different locations in Skåne and analysed with PCR, rolling circle amplification and digestion with restriction enzymes. To be able to use the total DNA for analysis a new method for extracting the DNA from leafhoppers was tested, which was verified to be successful. Alignments and a phylogenetic analysis were performed in MEGA 5.1 of the sequences obtained from the analysed samples, sequences from GenBank, and the master thesis by Yazdkhasti (2012). From the sequence analysis it could be confirmed that WDV from the wheat strain WDV-E was present in the samples with a high nucleotide identity so the conclusion was drawn that the isolates are close relatives to isolates from Sweden, China, and the rest of Europe. From the sequence and phylogenetic analyses it could
be seen that it was likely that there had been no major recombination in the genome and that it was no new genotype of WDV. |
| format | First cycle, G2E |
| id | RepoSLU6436 |
| institution | Swedish University of Agricultural Sciences |
| language | Swedish Inglés |
| publishDate | 2014 |
| publishDateSort | 2014 |
| record_format | eprints |
| spelling | RepoSLU64362014-02-27T07:40:52Z https://stud.epsilon.slu.se/6436/ Characterisation of Wheat dwarf virus isolates from the vector Psammotettix alienus Lidemalm, Louise Pests of plants Plant diseases Wheat dwarf disease caused by Wheat dwarf virus (WDV) can cause a lot of damage in wheat fields by reduction of yield. WDV belongs to the genus Mastrevirus in the family of Geminiviridae and it is transmitted by the leafhopper Psammotettix alienus. Viruses in the genus Mastrevirus have a genome of single-stranded (ss) circular DNA ranging in size from 2.6 kb – 2.8 kb. Mastreviruses have monopartite genomes with three genes: a movement protein (MP) gene, coat protein (CP) gene, and Rep. Replication-associated protein (Rep) and replication-associated protein A (RepA) are both translated from Rep, but from two different mRNAs. For Rep, an intron has been spliced out, while for RepA the intron has been kept. The aim of this study was to see if the WDV isolates from samples collected in Skåne, Sweden during 2010 was a new genotype, by analysing the DNA sequences. The samples from Skåne were of interest because for many years there have been no records of wheat dwarf disease in Skåne. The hypothesis was that there was no new genotype of WDV and thus, that no recombination have occurred. To test the hypothesis DNA was extracted from leafhoppers collected at different locations in Skåne and analysed with PCR, rolling circle amplification and digestion with restriction enzymes. To be able to use the total DNA for analysis a new method for extracting the DNA from leafhoppers was tested, which was verified to be successful. Alignments and a phylogenetic analysis were performed in MEGA 5.1 of the sequences obtained from the analysed samples, sequences from GenBank, and the master thesis by Yazdkhasti (2012). From the sequence analysis it could be confirmed that WDV from the wheat strain WDV-E was present in the samples with a high nucleotide identity so the conclusion was drawn that the isolates are close relatives to isolates from Sweden, China, and the rest of Europe. From the sequence and phylogenetic analyses it could be seen that it was likely that there had been no major recombination in the genome and that it was no new genotype of WDV. 2014-02-18 First cycle, G2E NonPeerReviewed application/pdf sv https://stud.epsilon.slu.se/6436/18/lidemalm_l_140226.pdf Lidemalm, Louise, 2013. Characterisation of Wheat dwarf virus isolates from the vector Psammotettix alienus. First cycle, G2E. Uppsala: (NL, NJ) > Department of Plant Biology (from 140101) <https://stud.epsilon.slu.se/view/divisions/OID-480.html> urn:nbn:se:slu:epsilon-s-3052 eng |
| spellingShingle | Pests of plants Plant diseases Lidemalm, Louise Characterisation of Wheat dwarf virus isolates from the vector Psammotettix alienus |
| title | Characterisation of Wheat dwarf virus isolates from the vector Psammotettix alienus |
| title_full | Characterisation of Wheat dwarf virus isolates from the vector Psammotettix alienus |
| title_fullStr | Characterisation of Wheat dwarf virus isolates from the vector Psammotettix alienus |
| title_full_unstemmed | Characterisation of Wheat dwarf virus isolates from the vector Psammotettix alienus |
| title_short | Characterisation of Wheat dwarf virus isolates from the vector Psammotettix alienus |
| title_sort | characterisation of wheat dwarf virus isolates from the vector psammotettix alienus |
| topic | Pests of plants Plant diseases |
| url | https://stud.epsilon.slu.se/6436/ https://stud.epsilon.slu.se/6436/ |