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Wyświetlanie 1-2 z 2
Tytuł:
Detection and molecular characterization of the Iris severe mosaic virus-Ir isolate from Iran
Autorzy:
Nateqi, M.
Habibi, M.K.
Dizadji, A.
Parizad, S.
Powiązania:
https://bibliotekanauki.pl/articles/66139.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
detection
molecular characteristics
iris severe mosaic virus
isolate
phylogenesis
iris
Iridaceae
ornamental plant
Iran
Opis:
Iris belongs to the Iridaceae family. It is one of the most important pharmaceutical and ornamental plants in the world. To assess the potyvirus incidence in natural resources of iris plants in Iran, Antigen Coated-Plate ELISA (ACP-ELISA) was performed on 490 symptomatic rhizomatous iris leaf samples, which detected the potyvirus in 36.7% of the samples. Genomic 3’ end of one mechanically non-transmitted potyvirus isolate, comprising a 3’ untranslated region (390 bp) and C-terminus of the coat protein (CP) gene (459 bp), was amplified by reverse transcription polymerase chain reaction (RT-PCR), which was ligated into pTG19-T vector. The nucleotide sequence of amplicons was compared with related sequences, using Blastn software available at NCBI GenBank, and showed the highest similarity with Iris severe mosaic virus (ISMV) isolates. The nucleotide and deduced amino acid sequence of the CP C-terminus region was more than 83% identical with other ISMV isolates, therefore this isolate was designated as ISMV-Ir. This new ISMV isolate is closely related to the Chinese ISMV-PHz in phylogenetic analysis, based on the partial nucleotide and deduced amino acid sequence of the CP region. This is the first report of ISMV occurrence on Iris spp. in Iran.
Źródło:
Journal of Plant Protection Research; 2015, 55, 3
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phylogenetic analysis and genetic structure of new isolates of Tomato mosaic virus in Iran
Autorzy:
Rakhshandehroo, F.
Hashemi, S.S.
Shahraeen, N.
Powiązania:
https://bibliotekanauki.pl/articles/961661.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
phylogenetic analysis
genetic structure
new isolate
tomato mosaic virus
genetic differentiation
genetic variation
phylogenetic tree
Tobamovirus
Iran
Opis:
The present report describes the new occurrence of Tomato mosaic virus (ToMV) in cabbage, bean and Malva neglecta plants in Iran. In this study, sequence analyses of a partial RNA dependent RNA polymerases (RdRp) and complete movement protein (MP) and the coat protein (CP) nucleotide sequences of three new ToMV isolates collected from major crop fields in Iran revealed low genetic variation of RdRp gene compared to the CP and MP genes. The different topologies of the phylogenetic trees constructed, using available open reading frame (ORF1), ORF2 and ORF3 sequences from ToMV isolates, indicated different evolutionary constraints in these genomic regions. Statistical analysis also revealed that with the exception of CP other tested ToMV genes were under negative selection and the RdRp gene was under the strongest constraints. According to the phylogenetic tree it can be inferred from the nucleotide sequences of the complete CP and MP genes, that isolates from Iran and Egypt formed separate groups, irrespective of host origin. However, isolates clustered into groups with correlation to geographic origin but not the host. Analysis of the Ks*, Z* and Snn values also indicated genetic differentiation between ToMV populations. The Tajima’s D, Fu and Li’s statistical values were significantly negative for the RdRp gene of the Asian population which suggests the sudden expansion of ToMV in Asia. Taken together, the results indicate that negative selection and genetic drift were important evolutionary factors driving the genetic diversification of ToMV.
Źródło:
Journal of Plant Protection Research; 2018, 58, 1
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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