Numerous writers have found the origin of the
Ayrshire breed of cattle an intriguing study, and
although many have tried to throw light on the
subject, the historic origin of the progenitors of
the breed is still somewhat obscure.
1. Breed evolution was influenced by the introduction
of imported stocks.
2. Shows have affected the development of the breed - beneficially and adversely, according to the
standards set by the judges.
3. Homozygosity in the breed has been attained by
selection, with but little recourse to inbreeding.
This does not apply to the vessel bred type.
4. No sex difference in respect of inbreeding has been
5. No relationship has been demonstrated between
inbreeding and productivity. There is also no
conclusive evidence that inbreeding has had a
detrimental effect on high milk production.
6. One herd - Drumjoan - and one sire - Drumjoan
Hover -a -Blink - have had an outstanding influence
on the breed, but this influence came through the
fact that he sired bulls of good conformation.
Such inbreeding as took place to him was largely
incidental because he had so many sons of good show
7. The level of inbreeding amongst vessel bred type
is significantly higher than that of the milk type.