RosaceaePrunusFragariaPotentillaMalusIncidenceSorbusSpiraeaGeumSelf-Incompatibility in Flowering PlantsPyrusErwinia amylovoraPlant Components, AerialRosaGenome, PlantRosalesPollenFruitPolyploidyFlowersRibonucleasesPhylogenyExpressed Sequence TagsGeneticsChromosomes, PlantGenes, PlantPollinationTriterpenesTrees