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    EFFECTS OF CANE-GIRDLING AND CLUSTER AND BERRY THINNING ON BERRY ORGANIC ACIDS OF FOUR Vitis vinifera L. TABLE GRAPE CULTIVARS
    (Wydawnictwo Akad Rolniczej W Lublinie, 2013) Keskin, Nurhan; Isci, Burcak; Gokbayrak, Zeliha
    The response of berry organic acids of four organically grown table grape cultivars to cane-girdling and cluster-berry thinning treatments were evaluated over two growing seasons. In addition pH, titratable acidity, soluble solids content and maturity index were also determined. Statistical analyses showed that individual organic acid content of the four grape cultivars were significantly affected by the treatments. Tartaric and malic acids of 'Red Globe' were mostly influenced by the cluster-berry thinning treatment. 'Alphonse Lavallee' accumulated the highest tartaric acid and malic acid in both the girdled/thinned and the cluster-berry thinned vines, respectively. The control and girdled 'Tralcya Ilkeren' vines had the most tartaric acid. Control vines also contained high malic acid amount. 'Bum Razakisi', on the other hand, had the most prominent tartaric and malic acid levels in the girdled/thinned and thinned vines, respectively. Quality parameters also showed significant differences among the cultivars in response to the treatments.
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    Öğe
    Establishing Genetic Relation between a Marker Locus and Fungal Disease in Grapevine Using Multidimensional Scaling Analysis
    (Univ Agr Sci & Veterinary Med Cluj-Napoca, 2010) Gokbayrak, Zeliha; Isci, Burcak; Ozer, Cengiz; Soylemezoglu, Gokhan; Altindisli, Ahmet
    In 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 026