BREEDING POULTRY FOR EGG PRODUCTION. 



165 



Pedigree Line D61D168 (Complete) 



^D168i33)y-$D6l\ 



^E248 (47) x$o5S < 



'iF308i7S)x$ 554-0 



{90 30(45) 

 I 62(55) 



354(55)x$566i ^fj^ 



I 428(49) 



I 495 (1) 



Mean of hign 

 line=52.8* 



166(4.9)xj7).w{?G204(41) 



l4l(51)y,$D3l{^^lll(f/^) 

 Mean of Dji's 

 daughter 5^^23.75 



I72(50)x$578-Cross 

 Mean of mutant 

 (high) line=^s6.$ 



9'e"231 ■ (J'5)x ^'.55^ ■9F233(^^) x $573-0 



419 (9)yi$551 



209 (55) X ^555-0 

 313 (S6)x'S554 



363 (ll)x$ooO 



( 9G221 (16} 



9F165 (7)x 369 \ 430 (IS) 



( 477 (1) 



Mean of main 

 (low) line^^g.S/ 



9 F250(^Ci) 

 174(i'i) 



15 (IS) 

 163 (19) 

 200 (IS) 

 141 (0) 

 116 (SS) 

 151 (11) 

 24 (S3)^ 

 Mean of main (low) line 



'^¥249(30) 

 Mean of main 

 (low) line=22.o 



--I7-5 



gametes. Then E248 may be supposed to have originated from 

 the union either of two "'high fecundity" gametes or one high 

 and one low fecundity gamete. She then would be either a DD 

 or a DR bird, on the assumption, which the facts seem to sup- 

 port, and which I have more fully discussed elsewhere,** that 

 high fecundity is dominant over low. 



* Omitting G495. See text. 



** "Inheritance in 'Blood Lines' in Breeding Animals for Performance, 

 with Special Reference to the '200-egg' Hen," Rept. Amer. Breeders' 

 Assoc, Vol. VL 1911 (in press). 



