%0 Journal Article
%T Mapping of A1 conferring resistance to the aphid Amphorophora idaei and dw (dwarfing habit) in red raspberry (Rubus idaeus L.) using AFLP and microsatellite markers
%A Daniel J Sargent
%A Felicidad Fern¨˘ndez-Fern¨˘ndez
%A Alicja Rys
%A Victoria H Knight
%A David W Simpson
%A Kenneth R Tobutt
%J BMC Plant Biology
%D 2007
%I BioMed Central
%R 10.1186/1471-2229-7-15
%X The progeny of 94 seedlings was scored for the segregation of 95 AFLP and 22 SSR markers and a linkage map was constructed that covers a total genetic distance of 505 cM over seven linkage groups. The average linkage group length was 72.2 cM and there was an average of 17 markers per linkage group, of which at least two were codominant SSRs, allowing comparisons with previously published maps of raspberry. The two phenotypic traits, A1 and dw, mapped to linkage groups 3 and 6 respectively.The mapping of A1 will facilitate the discrimination of resistance genes from different sources and the pyramiding of aphid resistance genes in new raspberry cultivars; the mapping of dw will allow further investigations into the genetics of dwarfing habit in Rubus.Red raspberry (Rubus idaeus L.) is an economically important member of the Rosaceae, cultivated mainly in Europe, the former USSR, and North and South America for its high value berries that are used both as dessert fruit and in processing. Rubus idaeus belongs to the sub-family Rosoideae and is a highly heterozygous diploid perennial species with a base chromosome number of seven (2n = 2x = 14).Raspberry breeding programmes worldwide aim to produce improved cultivars to satisfy market demands which can also produce a profit for the growers. From making a controlled cross to naming a new cultivar takes between 10 and 15 years and there are many targets, including fruit quality, yield and season, as well as pest and disease resistance and plant habit. The fresh market demands perfect fruit with no pesticide residues and the number of pesticides available for horticultural crops is diminishing; so pest and disease resistance is increasingly important. The large raspberry aphid, Amphorophora idaei, transmits several viruses including Raspberry leaf mottle virus (RLMV), Raspberry leaf spot virus (RLSV), Black raspberry necrosis virus (BRNV) and Rubus yellow net virus (RYNV), and vector resistance has been central to the bree
%U http://www.biomedcentral.com/1471-2229/7/15