HerefordSire
Well-known member
Located in the actual document accessible from I link I posted (see below). The percentage of sires with missing pedigree information...what a no-no for the breed in general and especially breed purists. Who could have made a management error like that? Who was on the board of directors during this time period?
"During the last half of the 20th century, breeders
may have imported animals that would not have been
in the association's pedigree file. The percentage of sires
(from 1950) with unknown parentage and mean inbreeding
for the full pedigree are shown in Figure 6.
The percentage of sires with missing pedigree information
was small and consistent until the early 1970s,
when it increased rapidly through the early 1990s. The
percentage of sires with missing pedigree information
was small (1.3% at its peak), but assuming that most
of the missing parentage is due to importation of genetics
into the population, it is likely that the imported
parents were widely selected for above-average performance.
Although the proportion of progeny from these
sires was less than 1% of all progeny (results not
shown), the multiplicative effects of these genes on subsequent
generations would likely affect the breed and
may have contributed to the decrease in relationship
between influential sires (Figure 5). The increase in
unknown parentage coincided with the decreasing inbreeding
trend and is one potential explanation for
the decrease.
Could this be why the registrations of Hereford has been drastically shrinking (chart in same document)? At this rate, I may be the only breeder of Herefords in twenty years. I wonder what the registration fee per animal would be then? Surely I would have the top bull of the year just like the inventor of the breed Mr. Gammons. I guess we will have alot in common. One document I read concerning a similar problem was "red" hair being discounted in markets written by the Chariman of the Board of the AHA. Is this a lame excuse? Is the real reason because Hereford breeders are trying to sell purebred Herefords that are not purebred because alien blood entered the breed and a big coverup occurred becuase the pedigree information is missing on imported animals?????????????????
"During the last half of the 20th century, breeders
may have imported animals that would not have been
in the association's pedigree file. The percentage of sires
(from 1950) with unknown parentage and mean inbreeding
for the full pedigree are shown in Figure 6.
The percentage of sires with missing pedigree information
was small and consistent until the early 1970s,
when it increased rapidly through the early 1990s. The
percentage of sires with missing pedigree information
was small (1.3% at its peak), but assuming that most
of the missing parentage is due to importation of genetics
into the population, it is likely that the imported
parents were widely selected for above-average performance.
Although the proportion of progeny from these
sires was less than 1% of all progeny (results not
shown), the multiplicative effects of these genes on subsequent
generations would likely affect the breed and
may have contributed to the decrease in relationship
between influential sires (Figure 5). The increase in
unknown parentage coincided with the decreasing inbreeding
trend and is one potential explanation for
the decrease.
Could this be why the registrations of Hereford has been drastically shrinking (chart in same document)? At this rate, I may be the only breeder of Herefords in twenty years. I wonder what the registration fee per animal would be then? Surely I would have the top bull of the year just like the inventor of the breed Mr. Gammons. I guess we will have alot in common. One document I read concerning a similar problem was "red" hair being discounted in markets written by the Chariman of the Board of the AHA. Is this a lame excuse? Is the real reason because Hereford breeders are trying to sell purebred Herefords that are not purebred because alien blood entered the breed and a big coverup occurred becuase the pedigree information is missing on imported animals?????????????????