larkota,
I think there are several examples that support this idea. Beyond the swine and poultry industry, there are several examples in the beef industry. The most notable that I can think of is Jorgensens. I wonder how many thousands of bulls they have leased out, then sold that were simply supported by the name "Jorgensen"? I remember discussions of being the "wal-mart" of the cattle business and thinking "why would you want to sell at a low price when people will pay more"? That was 20 years ago. I have a different outlook now!!
BTW, even in the poultry industry, there are good and "bad" lines. The Cobb 700 is replacing the Cobb 500. The improvement is ongoing. Nutrition research needs to be on the new line and not the old line.