No. 534] FECUNDITY IN THE DOMESTIC FOWL 329 



The Inheritance of Egg Production in Pedigree Lines 

 Let us now consider some of the evidence that such 

 things as genotypes of fecundity really exist in fowls. 

 We may first examine some representative pedigrees 

 covering four generations and showing the occurrence 

 of high and low fecundity lines. 



As a typical example of a high fecundity pedigree line 

 in which the high fecundity is genotypic, line D5D39 may 

 be considered. In the presentation of this and other 

 pedigree tables the following conventions are adopted. 

 The band numbers of the birds are in bold-faced type, 

 and following the band number of each female, her 

 winter egg record is given in italic figures enclosed in 

 parenthesis. The band numbers of males are given in 

 italics. 



This line is shown graphically in Fig. 2. 

 Little comment on this pedigree line is neceo «xj. , 

 i certain high degree of fecundity faithfully repro 



We 



a certain high di-ivr <•! irniiMlity taitlilully repro- 

 duced generation after generation. Different males were 



