1906.] 



On the Inheritance of Coat Colour in Horses. 



391 



In a work of such a magnitude and character as the ' General Stud Book,' 

 it is satisfactory to find that in a given case, tested by Mendel's law, 1 per 

 cent, covers the margin of error, and the result reflects great credit on all 

 those concerned in the compilation of the records. 



The following table gives the individual numbers of 30 of the chestnut 

 sires : — 



Table III (RRxRE). 



Chestnut Sires, of Various Extractions, Mated with Chestnut Mares of 



Various Extractions. 



Sires. 



Jiav and brown 

 foals. 



Onestnuo 

 foals. 



Total. 



- 







56 



56 





1 



49 



50 



Wiseman 



1 



48 



49 









45 



45 



Despair 







45 



45 





1 



41 



42 





1 



40 



41 



Bend Or 







40 



40 





1 



38 



39 









36 



36 



Orion 



o 



35 



35 









28 



28 





1 



27 



28 









27 



27 









27 



27 



Satiety 







25 



25 









24 



24 





1 



23 



24 









21 



21 



Timothy 







19 



19 



Hazlehatch 







18 



18 



Lowland Chief 







18 



18 









17 



17 



Aperse 







16 



16 



Albert Victor 







16 



16 









16 



16 



Gold 







15 



15 



Peter 







13 



13 









13 



13 









11 



11 









11 



11 



Seventy other chestnut sires . . . 



2 



237 



239 



Totals 



9 



1095 



1104 



It being established that chestnut is a Mendelian recessive, the question 

 arises, What is the critical feature which distinguishes chestnut from bay and 

 brown ? An examination of many horses leaves little doubt that the 

 chestnut is distinguished by the absence of black " points " (mane, tail, and 

 legs) always present in bay and brown. In all these types the colour of the 



