Establishing Genetic Relation between a Marker Locus and Fungal Disease in Grapevine Using Multidimensional Scaling Analysis

WOS: 000285236000028In a hybrid population of Italia (female) and Mercan (male) grape cultivars with their 60 offsprings a classical two point linkage analysis was attempted with 300 RAPD 20 SSR and 24 AFLP primers using Mapmaker/Exp 30 Linkage groups of 12 in Italia and 4 in Mercan were attained with 25 and 8 marker loci respectively Resistance phenotypes and segregating characteristics were scored as quantitative traits in two growing seasons MDS analysis was performed to examine the relationship between the marker loci and the fungal diseases powdery and downy mildew both of which developed naturally on the progenies Results of the MDS showed that five and eight marker loci were in close relationship with the powdery and downy mildew respectively The R-2 was 62 12% which considered as acceptable fit and the stress coefficient was 026TUBITAKTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [TARP 2189]This study was a derivation of combined data obtained from the two separate PhD theses fulfilled by Z Gokbayrak and B Isci We gratefully acknowledge the financial support from TUBITAK (Project Code Number TARP 2189) We also would like to thank Mehmet Mendes (Canakkale Onsekiz Mart University) for his invaluable help in statistical analysi