Due to the various climatic and soil characteristics existent in Turkey many fruits species can be grown economically. Citrus are grown in the Mediterranean region especially at the southern part of Toros mountains for many centruies. In the recent years citrus growth has increased year by year worldwide. In this study, second level selection lines of nucellar clones of important 20 local and foreign orange cultivars were used. These lines were planted in the research plot from 1975 to 1980. These genotypes were examined for 22 pomological and 4 plant characteristics. Fruits were harvested at optimal maturation stage and yield/tree rates were calculated individually. The twenty nucellar orange cultivars, named 'Hamlin (14-17)', 'Hamlin (14-15)', 'Magnum Bonum (15-10)', 'Trovita (A-35)', 'Parson Brown (18-17)', 'Portakal (P-24) (20-13)', 'Portakal (P-28) (21-10)', 'Shamouti WN', 'Yafa (14-4)', 'Yafa (A-21)', 'Balady (15-8)', 'Madame Vinous (A-36)', 'Drtyol Yerli (17-3)', 'Pineapple (18-10)', 'Barile (16-11)', 'Kozan Yerli (17-9)', 'Biondo (20-8)', 'Biondo Ricco (19-3)', 'Paperrind (18-5)' and 'Valencia (16-16)' were evaluated in terms of their yield and fruit quality characteristics. The cultivars 'Hamlin (14-15)', 'Balady (15-8)', 'Madame Vinous (A-36)', 'Trovita (A-35)' and 'Valencia (16-16)' were found very promising.