of dogs over thousands of years has made it extremely difficult to trace the ancient genetic roots of today's pets, according to a new study led by Durham University.
IRELAND'S traditional workhorse faces extinction because producers are cross-breeding
with other types of stallion to create showjumpers.
These experiments were done using gene-transfer techniques at an early stage of fetal development followed by generational cross-breeding
Some animal rights activists argue that ligers suffer from defects as a result of the cross-breeding
and are little help in preserving an already endangered species.
Intrigued, Tilghman and her colleagues obtained mice of the same species, repeated the cross-breeding
, and saw the same results.
The music is doo-wop being funny by cross-breeding
itself with various pop styles (David Byrne, the Beatles) and by bouncing off of its polished, dead-pan surface lyrics that satirize contemporary life.
For example, Monsanto's soybean could spread its herbicide resistance to related weeds through normal pollination and cross-breeding
, or become a weed itself.
Britain's isolation in the world of genetic improvement, thanks to post-BSE export bans, has hindered cross-breeding
research into its native breeds.
provides the lean yak meat with the marbling of beef, which makes it taste better.
Bill Foster, dairy breeding specialist with Genus Breeding, said the increase underlined the dairy industry's recognition of the benefits that cross-breeding