Genetic analysis of inheritance of partial resistance to Fusarium oxysporum in Asiatic hybrids of lily using RAPD markers

Linkage of RAPD markers with loci involved in partial resistance to Fusarium in Asiatic hybrid lilies was investigated. Variation in resistance was found in two greenhouse tests using scale bulblets of 150 descendants of a backcross population. The progeny did not show a clear Mendelian segregation in Fusarium resistance. Three out of 213 RAPD markers were significantly (p < 0.005) linked to Fusarium resistance explaining approximately 24 percent of the total phenotypic variance of the resistance. The construction of a genetic map with all RAPD markers was hampered because of different segregation types due to the dominant marker system and the low number of descendants evaluated per RAPD marker. Genomic regions, where Fusarium resistance loci were calculated to be linked to markers, were constructed. The use of RAPD markers for selection of quantitative traits and construction of linkage maps is discussed