|Le Gall, O|
Submitted to: Journal of Theoretical and Applied Genetics
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 8/1/2005
Publication Date: 9/30/2005
Citation: Lalli, D.A., Decroocq, V., Blenda, A.V., Schurdi-Levraud, V., Garay, L., Le Gall, O., Damsteegt, V.D., Reighard, G.L., Abbott, A.V. 2005. Identification and mapping of resistance gene analogs (rgas) in prunus: a resistance map for prunus. Journal of Theoretical and Applied Genetics (2005) 111:1504-1513 Interpretive Summary: Breeding for disease resistance is an important component of any crop improvement program. It is especially relevant to fruit tree crops where generation time is long and population size is limited. Therefore, any tool that can be used to shorten this process is important. One of the tools is understanding the number and location of disease resistance genes in tree fruit genomes. We have used genetic information from other species to study the genes present in Prunus. Using molecular tools we have generated a resistance map for Prunus with 42 locations of putative resistance genes spread among 7 or the 8 chromosomes in peach. This information will allow breeders to locate and incorporate specific genes into new varieties to control important diseases.
Technical Abstract: The genetically anchored physical map of peach is a valuable tool for identifying loci controlling economically important traits in Prunus. Breeding for disease resistance is a key component of most breeding programs. The identification of loci for pathogen resistance impeach provides information about resistance loci, the organization of resistance genes throughout the genome, and permits comparison of resistance regions among other genomes in the Rosaceae. This information will facilitate the breeding of resistant species of Prunus. A candidate gene approach was implemented for locating resistance loci in the genome of peach. Candidate genes representing NBS-LRR, kinase, transmembrane domain classes, as well as, pathogen response (PR) proteins and resistance-associated transcription factors were hybridized to a peach BAC library and mapped by using the peach physical map database and the Genome Database for Rosaceae (GDR). A resistance map for Prunus was generated and currently contains 42 map locations for putative resistance regions distributed among 7 of the 8 linkage groups.