This book is written by Mrs. Jameela H. Salih, under supervision of Assist. Prof. Dr. Shekhmous H. Hussen, to the Dept. of Animal Production, College of Agricultural Engineering Sciences, University of Duhok, Kurdistan Region-Iraq. The book including a wide study about the productive performance and Genetic evaluation of three quail lines and their crosses (using a full diallel design) under Kurdistan environmental conditions.