Biometric studies of the type in the White Leghorn

Abstract

1 This study of physical characters of 175 hens over 6 months old which were breeded in Hokkaido, Japan, and of a certain numfer of eggs laid by them was made for the purpose of selecting the white Leghorn.
2 The normal type, as is ordinarilly done, was decided by means of regression equation and biometrical constant, namely mean value, standard deviation, and correlation coefficient, obtained through the measurement of the ten parts in physical characters.
3 Those which came under the normal type sho wed 5.71% of the whole.