Makale 1990-1999 yılları
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Item Occurrence of races of fusarium oxysporum f. sp. melonis causing wilt on melon in central Anatolia(Türkiye Fitopatoloji Derneği, 1999) Erzurum, Kudret; Kantoğlu, K. Yaprak; Seçer, Emine; Yanmaz, Ruhsar; Maden, Salih; TAEK-ANTHAMRoot samples from 504 plants in 105 fields from the most widely melon growing provinces of Ankara, Çankırı, Kırıkkale, Konya and Yozgat of Central Anatolia were collected and isolations were made on PDA having 50 µg/ml streptomycin. The obtained 226 Fusarium oxysporum isolates were tested for their pathogenicity by root dip inoculation on the cultivar Charentais T under controlled environment. The pathogenic 89 isolates were inoculated on the differential cultivars of Charentais T, Charentais Fom 1, Charentais Fom 2 and the races of Fusarium oxysporum f.sp. melonis were evaluated by reactions of the differential cultivars after 30 days from inoculation. Forty nine of the Fusarium oxysporum f.sp. melonis isolates were race 1.2, and 22, 16 and 2 were race 0, race 1 and race 2 respectively. Races of this pathogens were determined the first time in this region.Item The effects of gamma irradiation on pollen viability and haploid plant formation in snake cucumber (Cucumis melo var. flexuosus Naud.)(ISHS, 1999) Yanmaz, Ruhsar; Ellialtıoğlu, Ş. Şebnem; Kantoğlu, K. Yaprak; TAEK-ANTHAMIn this research the effects of gamma irradiation (250, 300, 350 Gy) on in vitro pollen viability and haploid embryo stimulation in inbred snake cucumber named line 6 were investigated. In vitro pollen viability was higher in pollens irradiated with 250 and 300 Gy doses (28,8% and 28% respectively) than 350 Gy (19,4 %). Pollen viability decreased by the increase of the pollen age besides the doses. According to the fruit set and parthenogenetic embryo formation ratios, 300 and 350 Gy doses seemed better than 250 Gy dose.