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Screening of Lycopersicon sp. accessions for resistance to Pepper yellow mosaic virus
The tomato is a crop of great economical importance, however it is susceptible to a large number of pests and diseases, including viral disease for which the best control strategy is genetic resistance. The disease, caused by Pepper yellow mosaic virus (PepYMV) has become a recent problem. Consequen...
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Published in: | Scientia agricola 2006-10, Vol.63 (5), p.510-512 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | The tomato is a crop of great economical importance, however it is susceptible to a large number of pests and diseases, including viral disease for which the best control strategy is genetic resistance. The disease, caused by Pepper yellow mosaic virus (PepYMV) has become a recent problem. Consequently, the idea of this work was to screen 376 accessions of Lycopersicon sp. to find possible sources of resistance to PepYMV. Out of 355 accessions of L. esculentum inoculated with PepYMV, 52 did not express symptoms. However, the virus reached high concentration in the tissues as measured by indirect ELISA, and therefore they were not considered as safe sources of resistance. Among 21 accessions of wild Lycopersicon species, one of L. hirsutum was shown to be resistant, with no observed symptoms. A low concentration of the virus was detected as measured by indirect ELISA. This accession seems to be suitable for breeding programs aiming at incorporating resistance for this disease into commercial tomato cultivars.
O tomateiro é uma olerícola de grande importância econômica, porém suscetível a um grande número de patógenos, dentre os quais os vírus, cuja forma de controle mais eficiente é a resistência genética. A doença causada pelo Pepper yellow mosaic virus (PepYMV) tem se tornado um problema recente. Por isso, o presente estudo teve por objetivo avaliar 376 acessos de Lycopersicon sp. visando identificar fontes de resistência ao PepYMV. Dos 355 acessos de L. esculentum inoculados com o PepYMV, 52 não apresentaram sintomas. No entanto, não foram considerados fonte segura de resistência por conterem alta concentração viral quando avaliados pelo teste de ELISA indireto. Dentre os 21 acessos de espécies silvestres do gênero, foi detectado um acesso de L. hirsutum resistente por ser assintomático. Baixa concentração do vírus foi detectada pelo teste de ELISA indireto. Este acesso pode ser indicado para programas de melhoramento visando incorporar resistência a este vírus em cultivares comerciais de tomate. |
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ISSN: | 0103-9016 1678-992X 0103-9016 1678-992X |
DOI: | 10.1590/S0103-90162006000500014 |