S8 



FECUNDITY IN THE DOMESTIC FOWL 



ZSL5 



40.5 4W 5^ 67.5 76.5 

 WINTER BOO PRODUCTION 



Fio. 2. Diagram showing range of variation and mean fecundity In each 

 generation of line D5D39. The main polygons of variation give the distribution 

 of fecundity In the general flock in each generation. The cross-batched areas 

 represent the pedigree line, and the heavy dotted lines through these areas 

 represent the mean fecundity of the line In each generation. 



