TUPÝ, Jaroslav, LOUDA, Otto, ZIMA, Jan. Malus Mill., apple tree named Sirius. Ústav experimentální botaniky AV ČR, v. v. i., 2008. Odrůda ÚEB 3177/1 Sirius.

A new and distinct fruit apple variety of the type Golden Delicious. It is characterized by triploidy, strong vigor, scab resistance based on Vf gene, medium to large round fruits with yellow grand color, occasionally covered with a slight orange-red blush, maturing about 10 days after Golden Delicious and having good storage quality. The flesh is yellowish, firm, crisp, fine grained, very juicy, with high, well balanced sugar and acid content and aromatic flavor thereby providing an excellent eating quality. The variety is considered mainly for commercial organic apple growing.