A metodical approach for sanitation of grapevine cultivars using chemotherapy

The guideline describe a method of grapevine cultivation in vitro and its sanitation from virus pathogens usinf Ribavirin. Large part of this guideline describe diagnostic protocols for estimation of healthy status of sanitated grapevines. The guideline is intended for laboratories dealing with sanitation and diagnostics of viral pathogens of grapevine cultivars and rootstocks. Further utilization can be done by the Ministry of Agriculture, Central Institute for Supervising and Testing in Agriculture and also by growers of grapevine

Characterization of <i>Prunus Necrotic Ringspot Virus</i> and <i>Cherry Virus</i> A Infecting Myrobalan Rootstock

Prunus necrotic ringspot virus (PNRSV) and cherry virus A (CVA) are two viruses that mainly infect plants of the genus Prunus. Full-length sequences of these two viruses, collected in the Czech Republic from Prunus cerasifera plants, were obtained via HTS sequencing. Phylogenetic analyses based on the NJ method and Splitstree tools showed that the Czech PNRSV isolate (ON088600-ON088602) is a divergent isolate from other molecular groups, sharing less than 97% pairwise nucleotide identity with members of other groups. The Czech CVA isolate (ON088603) belonged to molecular subgroup III-2, clustered with isolates from non-cherry hosts, and shared the highest pairwise nucleotide identity (99.7%) with an isolate of Australian origin

Multiple Infections with Viruses of the Family <i>Tymoviridae</i> in Czech Grapevines

This study focused on the viruses of the Tymoviridae family that infect grapevines in the Czech Republic. Complete sequences of GFkV (grapevine fleck virus) and GRGV (grapevine red globe virus) from the genus Maculavirus and GRVFV (grapevine rupestris vein feathering virus) and GSyV-1 (grapevine Syrah virus 1) from the genus Marafivirus were obtained using high-throughput sequencing of small RNAs and total RNAs. Mixed infections with these viruses were observed, as well as several variants of these viruses in the same plant. Phylogenetic analysis showed the position of the newly obtained virus isolates within the Tymoviridae family. Recombinant analysis provided evidence of single and multiple intraspecific recombinations in GRGV, GSyV-1, and GRVFV. Additionally, GAMaV, a grapevine virus from the genus Marafivirus, was reported for the first time in the Czech Republic

Comprehensive Virus Detection Using Next Generation Sequencing in Grapevine Vascular Tissues of Plants Obtained from the Wine Regions of Bohemia and Moravia (Czech Republic)

<div><p>Comprehensive next generation sequencing virus detection was used to detect the whole spectrum of viruses and viroids in selected grapevines from the Czech Republic. The novel NGS approach was based on sequencing libraries of small RNA isolated from grapevine vascular tissues. Eight previously partially-characterized grapevines of diverse varieties were selected and subjected to analysis: Chardonnay, Laurot, Guzal Kara, and rootstock Kober 125AA from the Moravia wine-producing region; plus Müller-Thurgau and Pinot Noir from the Bohemia wine-producing region, both in the Czech Republic. Using next generation sequencing of small RNA, the presence of 8 viruses and 2 viroids were detected in a set of eight grapevines; therefore, confirming the high effectiveness of the technique in plant virology and producing results supporting previous data on multiple infected grapevines in Czech vineyards. Among the pathogens detected, the <i>Grapevine rupestris vein feathering virus</i> and <i>Grapevine yellow speckle viroid 1</i> were recorded in the Czech Republic for the first time.</p></div

Description of the primers and PCR conditions used for the detection of grapevine viruses.

<p>Description of the primers and PCR conditions used for the detection of grapevine viruses.</p

List of reference sequences used for individual viruses and viroids.

<p>List of reference sequences used for individual viruses and viroids.</p