OZET : Bu calisma 2011-2012 yillarinda Ataturk Universitesi’ne ait Ata Botanik Parki’nda olusturulan cilek parselinde yurutulmustur. Erzurum ekolojik sartlarinda daha onceki calismalarda verim potansiyelinin yuksek oldugu tespit edilen Fern cesidi ile bes yeni cilek cesidinin frigo fideleri (Sweet Ann, Crystal, Redlands Hope, Kabarla ve Rubygem) kullanilarak arastirma yurutulmustur. Arastirma parseli 2011 yilinda olusturulmus, ayni yil gozlenen cicek salkimlari koparilmis, verim ve kalite degerlendirmesi yapilmamistir. Parseldeki bitkilerin ikinci yilinda bitki basina en dusuk verim Rubygem (98,6g), en yuksek verim ise Kabarla cesidinden (296,2g); en kucuk meyveler Fern (6,2g), en iri meyveler ise Sweet Ann cesidinden (9,0g) elde edilmistir. Meyve sayisi en az Rubygem (11,8 adet), en fazla Fern cesidinde (42,3 adet); meyve delinme direnci en dusuk Redlands Hope (67,4 g/1,75 mm-uc), en yuksek Crystal cesidinde (92,5 g/1,75 mm-uc) tespit edilmistir. Bir yasli bitkilerdeki kardes sayisi en az Rubygem (2,1 adet), en fazla Kabarla ve Sweet Ann cesidinde (3,3 adet) belirlenmistir. Pazarlanabilir urun miktari acisindan cesitler arasinda cok onemli farkin oldugu; bu degerin en yuksek Redlands Hope cesidinde %94,9, en dusuk Fern cesidinde %81,6 oldugu tespit edilmistir. Hasat periyodunda dort farkli donemde orneklenen cilek cesitlerinin meyve sularinin SCKM icerikleri ve pH degerleri arasinda cok onemli farkliliklar tespit edilmistir. Cesitler arasinda SCKM degeri %7,3 (Kabarla) ile %9,5 (Rubygem) arasinda, pH degerleri ise 2,3 (Kabarla) ile 2,9 (Rubygem) arasinda degismistir. Onemli farkin bulundugu C vitamini icerigi ise en dusuk Redlands Hope’da (38 mg/100ml), en yuksek ise Crystal’de (56 mg/100ml) belirlenmistir. Sonuc olarak, yeni cilek cesitlerinden Kabarla, Crystal ve Sweet Ann’in Erzurum sartlarinda Fern cilek cesidine alternatif cesitler olabilecegi tespit edilmistir. Anahtar Kelimeler: Cilek, Fragaria x ananassa , yeni cesit, adaptasyon, Erzurum Some Strawberry Cultivars ( Fragaria X ananassa Duch.) Determination of Performance in Erzurum Ecological Conditions ABSTRACT : This study was carried out field conditions at Ata Botanical Park of Ataturk University, in 2011-2012. The Fern strawberry cultivar which has high yield potential in Erzurum conditions and five new strawberry cultivars (Sweet Ann, Crystal, Redlands Hope, Kabarla and Rubygem) was used. The research plots were established in 2011, clusters of flowers was plucked and there has not been evaluation the yield and quality in this year. The lowest yield of per plant was obtained from Rubygem (98.6g), the highest yield of per plant was obtained from Kabarla cultivar (296.2g), the smallest fruit was obtained from Fern (6.2g) and the largest fruit was obtained from Sweet Ann cultivar (9.0g) in the second year. The least number of fruit in Rubygem (11.8 number), the most number of fruit in Fern cultivar (42.3 number), the lowest puncture resistance of fruit in Redlands Hope (67.4 g/1.75 mm-tip), the highest puncture resistance of fruit in Crystal cultivar (92.5 g/1.75 mm-tip) was determined in the study. The least number of siblings in young plants was determined in Rubygem (2.1 number) while the highest number of siblings in young plants was determined in Kabarla and Sweet Ann cvs. (3.3 number). There was important differences as statistically in term of the marketable yield and the highest values in Redlands Hope (94.9%), the lowest values in Fern (81.6%) was obtained. The content of TSS and pH in fruit juice were significantly different. The value of TSS has ranging ratio from 7.3% (Kabarla) to 9.5% (Rubygem). The value of pH ranging ratio from 2.3 (Kabarla) to 2.9 (Rubygem). The content of ascorbic acid in fruit between cultivars were statistically significant. The lowest content of ascorbic acid was obtained from Redlands Hope (38mg/100ml) and the highest content of ascorbic acid was obtained from Crystal (56mg/100ml). As a result of this study, it was determined to the new strawberry cultivars such as Kabarla, Crystal and Sweet Ann may be an alternative to Fern strawberry cultivar in Erzurum conditions. Keywords: Strawberry, Fragaria x ananassa , new cultivar, adaptation, Erzurum