Identification of QTLs associated with citrus resistance to Phytophthora gummosis

Publication Overview
TitleIdentification of QTLs associated with citrus resistance to Phytophthora gummosis
AuthorsSiviero A, Cristofani M, Furtado EL, Garcia AAF, Coelho ASG, and Machado MA
TypeJournal Article
Journal NameJournal of Applied Genetics
Volume47
Issue1
Year2006
Page(s)23-28
CitationSiviero A, Cristofani M, Furtado EL, Garcia AAF, Coelho ASG, and Machado MA. Identification of QTLs associated with citrus resistance to Phytophthora gummosis. Journal of Applied Genetics. 2006. 47(1):23-28.

Abstract

Citrus gummosis, caused by Phytophthora 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 Phytophthora gummosis resistance. Eighty individuals of the F1 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 1 and 5 of the P. trifoliata 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. trifoliata. The low character heritability (h2 = 18.7%) and the detection of more than one QTL associated with citrus Phytophthora gummosis resistance showed that inheritance of the resistance is quantitative.
Stocks
This publication contains information about 3 stocks:
Stock NameUniquenameType
SunkiSunkicultivar
RubidouxRubidouxcultivar
Citrus-Rubidoux_x_Sunki-F1Citrus-Rubidoux_x_Sunki-F1population
Projects
This publication contains information about 1 projects:
Project NameDescription
Citrus-Phytophthora_Gummosis-Siviero-2006
Properties
Additional details for this publication include:
Property NameValue
Journal AbbreviationJ Appl Genet
Year2006
URLhttp://dx.doi.org/10.1007/BF03194595
Keywordscitrus disease, genetic mapping, gummosis, inheritance, Phytophthora, QTL, resistance
Cross References
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DatabaseAccession
PMID: PubMedPMID:16424605