Broad Breasted White

The Broad Breasted White is commercially the most widely-used breed of domesticated turkey. These birds have shorter breast bones, exceedingly large breasts, are often very fat, and have shorter legs than "standard" turkeys, rendering them unable to breed without human assistance (typically via In vitro fertilisation). They produce more breast meat and their pin feathers are less visible when the carcass is dressed due to their white color. These properties have made the breed popular in commercial turkey production but enthusiasts of slow food argue that the development of this breed and the methods in commercial turkey production have come at a cost of less flavor.

http://en.wikipedia.org/wiki/Broad_Breasted_White