redcowsrule33 wrote:3waycross wrote:On another note of crossbreeding doesn't consistancy get better when you use an F1 x F1, say a simangus x simangus? I am trying some of that too but it is hard when most of the half bloods are all related and I don't linebreed.......
In a word, no. Think about it. In an F1 cross you are guaranteed that 50% of the genetics come from Simmental and 50% from Angus. However, when you do and F1 x F1, there is no guarantee of what breed the genes will come from. Sperm from an F1 will be a mix of genes that range from 100% Simmental to 100% Angus based on probability. Same with the cow (ok, the mitochondrial DNA from the dam will be exclusively from her dam so it depends on the breed of the dam of the F1 but let's not confound things). So you end up with a bunch of calves that are very inconsistent; the F2 cross will give you maximum inconsistency. Creating a breed from other breeds takes a long time as you need to select continually for consistency in the traits you desire until you get a group of cattle that breeds true.
If you want a good example of what I'm talking about google pictures of F1 Golden Doodles (dogs) and F2 Golden Doodles (or Labradoodles). I'm not a Doodle fan or of any designer dog for that matter but they provide an excellent visual of what happens when you cross F1's.
I didn't write that!