286 



MASS. EXPERIMENT STATION BULLETIN 258 



Table 18. — Record of All Surviving Daughters from the 1927 Matings — 



Concluded 



Dam No. 



Bird No. 



Age 

 at First 



Weight 



at First 



Egg 



Pause 



Average 

 Winter 

 Clutcn 



Total 



Days 



Broody 



Annual 

 Persist- 

 ency 



Annual 

 Produc- 

 tion 



F 1589 



F 2147 



G 1241 



G 1221 



G 1418 



Days \ Lbs. Days 1 Eggs 



Inbred Pen 2 — Crossed 



Inbred Pen 3 — Crossed 



Days 



154 

 212 

 205 

 228 

 206 

 193 

 223 

 224 

 219 



246 

 182 

 182 

 228 

 160 

 226 

 199 

 197 

 145 

 220 

 169 

 194 



185 



142 

 202 

 181 

 216 

 228 

 211 



193 

 237 

 203 

 221 

 216 

 2.54 

 155 



Table 18 shows the progeny records from the 1927 matings. In the check 

 daughters under the second generation of inbreeding, early sexual maturity was 

 well established. This group of daughters was, however, significantly lighter in 

 weight at first egg than the inbred daughters. Winter pause was more common 

 in the check daughters than in inbred daughters from pen 3. Check daughters 

 were very deficient in intensity. The majority showed small clutch size, and 

 they were inferior to all of the inbred groups in this respect. Broodiness during 

 the pullet year had almost disappeared in the checks. Lack of high persistency 

 was notable in the check daughters. They showed about equal numbers with 

 high and low persistency, while the inbreds showed a much greater proportion 

 with high persistency. As might be anticipated, the annual egg records of the 

 check daughters fell far below the records of the inbreds. 



The three inbred pens may be cited as examples of results from different de- 

 grees of inbreeding. Inbred pen 1 daughters, coming from half brother-sister 

 matings of the original inbreds, were satisfactory in early maturity and in body 

 weight. This group of daughters showed 3 non-pause to 11 pause, and less than 

 half were high for intensity. From the standpoint of non-broodiness, they were 

 satisfactory, there being 11 non-broody to 3 broody. In persistency the pro- 



