Cabanha Santa Isabel - BR
Well-known member
HerefordGuy said:Attached is Figure S15 from Decker et al 2012. http://www.biomedcentral.com/1471-2164/13/606oakview said:Interesting article. I would like to see the same "dot graph" applied to today's Angus, for example, compared to the 50's and early 60's genetics (or earlier). It would be interesting to see what type of influence the Holsteins, Maines, or whatever else was used to get them big, had. I assume a similar influence, though perhaps not as widespread or significant, would show up in Herefords. I also assume the "dots" would be more widespread in the continental breeds, particularly those that have turned black over the past several generations.
The data set has samples from 1955 to about 2009.
The animals in red are from the Wye herd. http://agresearch.umd.edu/wye/angus
The animals in blue are related to EXT. The EXT family was the most heavily sampled family, thus it accounts for a large portion of the variation in the sample and is identified as the second principal component.
You may also be interested in http://www.plosgenetics.org/article/info%3Adoi%2F10.1371%2Fjournal.pgen.1004254.
I like the policy of the American Hereford Association that every herd bull needs to be parentage tested in order for calves to be registered.
Very good read...but not understood well the results on the graphic. There are show differents genotypes, so Wye cattle is a closed herd with almost original population pre-new-type. The EXT line is of course very distinctive of Wye population as it isn't so inbred and closely related.
Do you means that EXT could show any outside interference as well rest of population?
Please, is only a question, not a way to be agressive with your comments! I really not understood where the graphic is related to pure lines or something like this.
Thanks, good work! Similar data with Herefords would to be good to see....but I always hope to see the names/register numers of animals involved on these tests....
Thank you again.