The effect of the age of sire and dam on the quality of offspring in dairy effectofageofsir00alle Year: 1922 Reprinted, leithou! cinuu/c of piujing. from the Journal of Heredity (Oraan of the Aineriean Ci'e)ietie .IssoeiationJ, J'ol. XIII, Xo. i; IVashinoton. P. C. .Ipril, iqjj THE EFFECT OF THE AGE OF SIRE AND DAM ON THE QUALITY OF OFFSPRING IN DAIRY COWS C. L. Allex Cornell University, Ithaca, N. Y A FAMOUS HOLSTEIN SIRE Figure 10. Ormsby Kornclyke Lad (102469) one of the great sires of the Holstein Friesian Breed. His daughters are noted for their high production records for bot
The effect of the age of sire and dam on the quality of offspring in dairy effectofageofsir00alle Year: 1922 Reprinted, leithou! cinuu/c of piujing. from the Journal of Heredity (Oraan of the Aineriean Ci'e)ietie .IssoeiationJ, J'ol. XIII, Xo. i; IVashinoton. P. C. .Ipril, iqjj THE EFFECT OF THE AGE OF SIRE AND DAM ON THE QUALITY OF OFFSPRING IN DAIRY COWS C. L. Allex Cornell University, Ithaca, N. Y A FAMOUS HOLSTEIN SIRE Figure 10. Ormsby Kornclyke Lad (102469) one of the great sires of the Holstein Friesian Breed. His daughters are noted for their high production records for both 7 day and yearly work. He has 18 daughters with records of over 30 pounds of butter (80 fat) in 7 days. He also has 14 daughters with records of over 1000 pounds of butter (80 fat) in one year. The sire of Ormsby Korndyke Lad was only 23 months of age when he was born and his dam was just a little over 4 years of age (51 months). Photograph from Holstein Friesian World. THE effect of the age of parents on the quahty of the offspring is in a large measure concerned with the idea of cumulative inheritance, par- ticularly if we do not consider the matter of the proven sire or dam. If an animal is a more valuable parent after it has attained maturity, it is more valuable for one of two rea- sons. Either the mature animal must be able, merely because of its full physical development better to im- 167 press its characters on its offspring, or the mature animal must in the process of attaining maturity, ha\'e become endowed with something, due to train- ing or environment, which it can trans- mit to its progeny. After a century of study, this matter is far from settled and the question as to the possible effect of environment on the transmis- sion of a tendency to increase or de- crease certain quantitative functions is still important.
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