I. I. Kochish1 , M. O. Dashkov1 and E. S. Elizarov1 (1)  Skryabin State Academy of Veterinary Medicine and Biotechnology, Moscow, 109472, Russia Received: 14 June 2007  Published online: 4 May 2008 Abstract  Meat chickens of the parent flock of the Konkurent-3 cross are assessed by the iris of their eyes (iridodiagnosis). Three types of iris—radial, radial homogeneous, and radial lacunar—are found and their frequency is determined. The relation between this trait and viability of parents and offspring is studied. Original Russian Text © I.I. Kochish, M.O. Dashkov, E.S. Elizarov, 2008, published in Doklady Rossiiskoi Akademii Sel’skokhozyaistvennykh Nauk, 2008, No. 1, pp. 49–50.