Identification of QTLs associated with citrus resistance to Phytophthora gummosis

Identification of QTLs associated with citrus resistance to Phytophthora gummosis

Autor Siviero, A. Google Scholar
Cristofani, M. Google Scholar
Furtado, E. L. Google Scholar
Garcia, AAF Google Scholar
Coelho, ASG Google Scholar
Machado, M. A. Google Scholar
Instituição Inst Agron
Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
Universidade de São Paulo (USP)
Universidade Federal de São Paulo (UNIFESP)
Resumo Citrus gummosis, caused by Phylophthora spp., is an important citrus disease in Brazil. Almost all citrus rootstock varieties are susceptible to it to some degree, whereas resistance is present in Poncirus trifoliata, a closely related species. the objective of this study was to detect QTLs linked to citrus Phylophthora gummosis resistance. Eighty individuals of the F, progeny, obtained by controlled crosses between Sunki mandarin Citrus sunki (susceptible) and Poncirus trifoliata cv. Rubidoux (resistant), were evaluated. Resistance to Phytophthora parasitica was evaluated by inoculating stems of young plants with a disc of fungal mycelia and measuring lesion lengths a month later. Two QTLs linked to gummosis resistance were detected in linkage groups I and 5 of the P. trifoliala map, and one QTL in linkage group 2 of the C sunki map. the phenotypic variation explained by individual QTLs was 14% for C sunki and ranged from 16 to 24% for P. trifoliala. the low character heritability (h(2) = 18.7%) and the detection of more than one QTL associated with citrus Phytophthora gummosis resistance showed that inheritance of the resistance is quantitative.
Assunto citrus disease
genetic mapping
Idioma Inglês
Data 2006-01-01
Publicado em Journal of Applied Genetics. Poznan: Polish Academy of Sciences, Institute of Plant Genetics, v. 47, n. 1, p. 23-28, 2006.
ISSN 1234-1983 (Sherpa/Romeo, fator de impacto)
Editor Polish Academy of Sciences, Institute of Plant Genetics
Extensão 23-28
Direito de acesso Acesso restrito
Tipo Artigo
Web of Science WOS:000236119200006

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