EdinburghSalmon’s genome was copied whole 100 million years ago.

The extra gene copies still shape disease resistance in salmon, a major global protein source.

Duplicate genes freed one copy to keep its old job while the other evolved new functions, unlike single-letter mutations.

How these expression patterns affect farmed salmon traits like disease resistance remains under study.

How each outlet framed it
Phys.org
leverages salmonids' recent whole-genome duplication to illuminate how duplicate genes enable trait evolution vs ancient events

Sources: Phys.org