As for cross-breeding, Mother Nature had done it first, cross-pollinating different wild grasses until they produced a grain that could eventually expand into modern bread.

ECONOMIST: Norman Borlaug

But many ranches are now cross-breeding the zebu with Aberdeen Angus and other European stock.

ECONOMIST: Brazil

There may have been odder cases of satellite cross-breeding, but probably not many.

CNN: ASIA'S NO PUSHOVER

Reputable breeders are against such cross-breeding for fear it will tar them with the same brush and lead to laws that outlaws breeding of any kind of fighting dog.

BBC: News | UK | Dangerous dogs threaten a comeback

The study found that the so-called "ancient" breeds such as the Akita, Afghan Hound and Chinese Shar-Pei, are no closer to the first domestic dogs than any other breeds due to the effects of lots of cross-breeding.

BBC: Modern dogs have 'little in common' with ancient breeds

According to researchers, while many modern pets may look like those depicted in ancient Egyptian tombs or Roman mosaics, extensive cross-breeding through thousands of years has meant that no modern dog breeds can be truly classified as "ancient".

BBC: Modern dogs have 'little in common' with ancient breeds

Australian scientists are attempted to use genetic modification to develop a strain resistant to Race 4, while those in Honduras are working on breeding a better banana through more conventional means, by cross-pollination.

FORBES: Banana Fungus Threatens World Crop

The primary complaint driving this move: construction of a border fence would cut off cross-border populations of the same endangered jaguar and ocelot species from breeding with one another.

CENTERFORSECURITYPOLICY: Green Borders