QTL analysis for fruit quality traits and resistance to Colletotrichum acutatum and Phytophthora cactorum in octoploid strawberry (Fragaria x ananassa)

Publication Overview
TitleQTL analysis for fruit quality traits and resistance to Colletotrichum acutatum and Phytophthora cactorum in octoploid strawberry (Fragaria x ananassa)
AuthorsLerceteau-Kohler E, Moing A, Guerin G, Maucourt M, Renaud C, Rolin D, Roudeillac P, Denoyes-Rothan B
TypeJournal Article
Journal NameActa horticulturae
Volume649
Year2004
Page(s)93-97
CitationLerceteau-Kohler E, Moing A, Guerin G, Maucourt M, Renaud C, Rolin D, Roudeillac P, Denoyes-Rothan B. QTL analysis for fruit quality traits and resistance to Colletotrichum acutatum and Phytophthora cactorum in octoploid strawberry (Fragaria x ananassa). Acta horticulturae. 2004; (649)93-97.

Abstract

Mapping of quantitative trait loci (QTL) controlling components of strawberry (Fragaria x ananassa Duch., 2n=8x=56) fruit quality and resistance to Colletotrichum acutatum and Phytophthora cactorum can be used to provide a better understanding of the genetic control of the traits, and to develop marker assisted selection for breeders. A segregating population of 213 individuals of a cross between ‘Capitola’ and ‘CF1116’, two genotypes with many contrasting fruit quality traits, was used for genetic mapping. ‘Capitola’ was resistant to the C. acutatum - pathogenicity group 1 (pg1) and to P. cactorum while ‘CF1116’ was susceptible to C. acutatum and moderately susceptible to P. cactorum. Fruit quality was evaluated on a total of 34 traits, including developmental and fruit aspect related traits, texture related traits, fruit acidity, sugars, ascorbate and amino acid concentrations. Most of the traits except the amino acid concentrations were evaluated during two successive years. Disease responses to C. acutatum (pg2) and P. cactorum were evaluated using a scale from 0 (no observed symptom) to 5 (dead plant) in two successive independent experiments. Data were analysed for putative QTLs using MapQTL. For the fruit quality traits, a total of 22 significant QTLs were detected by simple interval mapping (LOD>3.0) in the first year of analyses and 17 were detected in the second year. Only two QTLs could be detected in both years. The percentages of phenotypic variance explained by each QTL ranged from 6.5% to 16.0%. For resistances, a total of nine QTLs was detected (LOD>2.0), 4 for resistance to C. acutatum and 5 for resistance to P. cactorum with the percentage of variation explained by a QTL ranging from 6.5 to 12.2%. No QTL for the P. cactorum resistance overlapped the QTLs for the C. acutatum resistance.
Features
This publication contains information about 10 features:
Feature NameUniquenameType
resistance to Colletotrichum acutatumqRCA.CCF-LG6CaQTL
resistance to Colletotrichum acutatumqRCA.CCF-LG11CaQTL
resistance to Colletotrichum acutatumqRCA.CCF-LG12CaQTL
resistance to Phytophthora cactorumqRPC.CCF-LG1CaQTL
resistance to Phytophthora cactorumqRPC.CCF-LG19CaQTL
resistance to Colletotrichum acutatumqRCA.CCF-LG14CFQTL
resistance to Colletotrichum acutatumqRCA.CCF-LG15CFQTL
resistance to Phytophthora cactorumqRPC.CCF-LG2aCFQTL
resistance to Phytophthora cactorumqRPC.CCF-LG11CFQTL
resistance to Phytophthora cactorumqRPC.CCF-LG40CFQTL
Projects
This publication contains information about 1 projects:
Project NameDescription
Strawberry Pathogen resistance-Denoyes-Rothan-2004