So if the most studied ,researched, documented linebreeding in cattle world wide is all smoke and mirrors. What long term linebreeding would you say isn't smoke and mirrors.
Btw just for info purposes,line 1 was started in 1934 to this day not a single outcross has been introduced into the line ,some 18 plus generations later.
The inbred coefficient within the herd is estimated to be about 10%
While the degree of relatedness to the original founding male is around 40%
So if that's all smoke and mirrors then what is your example of linebreeding that isn't?