Abstract
This study was conducted at domestic birds field belonging to College of Agriculture - University of Tikrit from 1/3/2011 to 15/6/2011;In this study, two breeds of Japanese quail black and brown birds were use by 60 females per breed. The results revealed that black breedwas significantly superior in egg production traits, age at sexual maturity(day), average weight of first egg (g),average eggs weight (g) average number ofeggs produced during the firsthundred days from laying the first egg (egg / bird) and the average of egg mass (g) were (43.20, 7.36, 12.93, 81.13 and 1049.01) and (44.00, 6.42, 11.42, 76.36 and 872.30) for the black and brown breed, respectively.The phenotypic correlation coefficient between age at sexual maturity and all of the prescription weight first egg and egg weight were positive and high significant correlation, while age at sexual maturity and number of eggs and egg mass is negative and highly significant. The phenotypic correlation werepositive and highly significant between the rate of weight status with the first egg recipe average egg weight and negative with the character of the average number of eggs. Also there was a positive correlation between the average number of eggs and egg mass in both breeds.
