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Effects of trichodorids and TRV on potato growth and yield

Study of the virus vector genus Trichodorus (Diphtherophorina, Trichodoridae) f...

Trichodoridae are polyphagous root ectoparasites occurring worldwide. Their major pest status is as virus vector of Tobraviruses. Currently, the family has 102 species classified within 6 genera. The genus Trichodorus is the largest in number of species (56) and predominantly occurs in temperate regions. Traditional morphology-based taxonomy revealed for Europe, a very high species diversity within the Iberian...

Integrative taxonomic study of the virus vector family Trichodoridae from the I...

Trichodoridae are polyphagous root ectoparasites occurring worldwide. Their major pest status is as virus vector of Tobraviruses. Currently, the family has 102 species classified within 6 genera. 88% of the species belong to the didelphic genera (females with two well developed genital branches) with the genus Trichodorus being the largest in number of species (56). Trichodorus species predominantly occur in t...

Molecular diagnosis of trichodorid species from Portugal

A PCR-RFLP assay was developed for the identification of trichodorids belonging to Nanidorus, Paratrichodorus and Trichodorus genera. Exploring the variability of the 18S SSU rDNA gene this method provides for the first time a molecular diagnosis tool alternative to the difficult and time consuming phenotyping especially of quite similar species, enabling selectivity in mixed samples with non-trichodorid specie...

Potato production impacts of the association trichodorids and TRV in naturally ...

An investigation was conducted to determine the effect of soil-born Tobacco rattle virus (TRV) isolates on yield and some quality attributes of 8 potato cultivars (Agata, Amorosa, Almera, Cunéria, Kondor, Picasso, Raja and Stemster) in Portuguese growing areas. Preliminary results revealed that some attributes (canopy growth, total yield, tuber numbers and yield within size grades, tuber spraing symptoms and se...

Phylogenetic relationships, based on SSU rDNA sequences, among the didelphic ge...

A survey of virus vector trichodorid nematodes was carried out in the central and northern regions of Portugal. Morphobio- metric identification showed the presence of trichodorid species previously reported from Portugal, except for Paratrichodorus porosus, which is reported for the first time in Continental Europe. Small subunit ribosomal DNA (SSU rDNA) sequences of ten different species occurring in Portugal...

A method to discriminate species of virus vector trichodorid nematodes explorin...

Phylogenetic relationships among Trichodorus and Paratrichodorus species

Resumo do poster apresentado no XXVII ESN International Symposium, Rome, 2004. ; Trichodorid nematodes of the genera Trichodorus and Paratrichodorus are known natural vectors of Tobacco Rattle Virus (TRV) to many agronomically important crops. Previous taxonomic studies have reported several trichodorids, including virus-vector species, from Portugal. The trichodorid group is well defined taxonomically but l...

Molecular diagnosis of Trichodorus and Paratrichodorus species

Some trichodorid species are known to vector specific strains of Tobacco Rattle Virus (TRV) that have a deleterious effect upon several economically important crops, e.g. potato and tobacco. Given the complex relationship that exists between trichodorids and the various TRV strains, it is imperative that a rapid and accurate identification to species level is achieved for the effective use of control measures w...

Tobacco rattle virus and its associated vector trichodorid nematodes in Portugal

Tobacco rattle virus (TRV, genus Tobravirus), transmitted by trichodorid nematodes, occurs as a wide range of serologically distinguishable strains that cause diseases in various economically important crops. The virus and its associated vector nematodes occur world-wide, being particularly prevalent in Europe and North America. In Portugal, an investigation is being conducted to identify TRV strains occurring ...