Simple and multiple resistances to viruses in cowpea genotypes
| Autor: | Ana Kelly Firmino da Silva, Nádia Rutielly de Araújo Ferreira, Maria do Livramento Aragão, Elizita Maria Teófilo, José Albérsio de Araújo Lima |
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| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
biology
Mosaic virus Inoculation Cucumber mosaic virus Cowpea aphid-borne mosaic virus food and beverages serology biology.organism_classification lcsh:S1-972 Virology Virus Serology sorologia Vigna controle de vírus virus control Genotype Animal Science and Zoology Cowpea severe mosaic virus Cultivar lcsh:Agriculture (General) Agronomy and Crop Science Vigna unguiculata |
| Zdroj: | Pesquisa Agropecuária Brasileira v.46 n.11 2011 Pesquisa Agropecuária Brasileira Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA Pesquisa Agropecuária Brasileira, Vol 46, Iss 11, Pp 1432-1438 (2011) |
| Popis: | The objective of this work was to identify new sources of simple and multiple resistances to Cowpea severe mosaic virus (CPSMV), Cowpea aphid-borne mosaic virus (CABMV) and Cucumber mosaic virus (CMV) isolates in cowpea (Vigna unguiculata). Thirty-three genotypes from the germplasm bank of Universidade Federal do Ceará were tested as to their resistance to four CPSMV isolates, two CABMV isolates and one CMV isolate. Twenty-five days after the first virus inoculations, all inoculated plants, including the asymptomatic ones, were tested by serology. Genotypes were classified as: immune, plants without symptoms and negative serology; resistant, plants with mild mosaic and positive serology; susceptible, plants with mosaic and positive serology; and highly susceptible, plants with severe mosaic, other systemic symptoms, including systemic necrosis, and positive serology. Simple and multiple resistances to viruses were identified among the evaluated genotypes, but none of them showed multiple immunities to all isolates. Four genotypes showed immunity to all CPSMV isolates, two were immune to CABMV and two showed immunity to CMV. Eleven genotypes showed multiple resistances to two viruses, allowing for the development of new cultivars with more stable and broader resistance. Genotypes Purple Knuckle Hull-55, MNC-03-731C-21 and CNCx284-66E show resistance to CABMV, even when inoculated with CMV. |
| Databáze: | OpenAIRE |
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