Identification of QTLs associated with citrus resistance to Phytophthora gummosis

• Autorzy: A. Siviero , M. Cristofani , E.L. Furtado , A.A.F. Garcia , A.S.G. Coelho , M.A. Machado
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

CITRUS GUMMOSIS; GENETIC MAPPING; GUMMOSIS; INHERITANCE; PHYTOPHTHORA

• Czasopismo: Journal of Applied Genetics
• Rocznik: 2006
• Tom: 47
• Numer: 1
• Strony: 23?28

Twórcy

autor

A. Siviero

autor

M. Cristofani

autor

E.L. Furtado

autor

A.A.F. Garcia

autor

A.S.G. Coelho

autor

M.A. Machado

• Typ dokumentu: ARTICLE
• Bibliografia: M. Cristofani, Centro APTA Citros Sylvio Moreira ? Instituto Agronomico (IAC), CP04, CEP13469-970, Cordeiropolis, Sao Paulo, Brasil