FECUNDITY IN THE DOMESTIC FOWL 



be remarkably prepotent in respect to this character, so that practically 

 regardless of the females with which he has been mated the get has been 

 uniformly poor in respect to egg production. Four adult females resulted 

 from the two matings under discussion. They have an average winter 

 production of 23.75 eggs. There are several possible explanations of this 

 result, but the most probable is that we have here simply one more instance 

 of the extraordinary prepotency of cfDSl. 



The last of the daughters of the mutant was mated to a cross-bred male, 

 no. 578, and consequently the progeny can not fairly be compared with the 

 pure Barred Plymouth Rocks in respect to fecundity. 



PEDIGREE LINE D6iDi68 (COMPLETE) 



9 D 168(33) Xd*Z><5/ 



9 F308X7S) X <?554 o 



l41(5i)X<7Z>ji 



9 G 30 (45) 



62 (58) 



117 (46) 



197 (66) 



428 (49) 



495 (i) 



Mean of high 



line =52.8" 



9 G204 (41) 

 254 (75) 



f 9 G229 (28) 



\ 458 (ii) 



Mean of DJI'S 



daughters = 23 .75 



1 72 (50) Xcf 578 Cross 



Mean of mutant 

 (high) line =56. 5 



9 E231(25)X 



419 



209(j)Xd 1 555- 

 313 



15 (18) 

 163 (19) 

 200 (12) 

 141 ( o) 



116(2*) 



151 (ii) 

 24 (23) 

 Mean of main (low) line 



9F165(7)X 569 



( 9 F250 (20) 

 \ 174 (21) 



9 7^249 (30) 

 Mean of main 

 (low) line = 22.0 



9 G221 (16) 

 430 (12) 

 477 (i) 



Mean of main 

 (low) line =9.67 



17-5 



"Omitting 6495. See texs. 



