Algae, we are told, get an average of one percent of their genome from bacteria, a different kingdom of life:
Algae in the oceans often steal genes from bacteria to gain beneficial attributes, such as the ability to tolerate stressful environments or break down carbohydrates for food, according to a Rutgers co-authored study.
The study of 23 species of brown and golden-brown algae, published in the journal Science Advances, shows for the first time that gene acquisition had a significant impact on the evolution of a massive and ancient group of algae and protists (mostly one-celled organisms including protozoa) that help form the base of oceanic food webs. These photosynthetic species produce about 70 percent of the oxygen we breathe and some of them, such as diatoms, are responsible for about 45 percent of global primary production of organic matter.Rutgers University, “Algae in the oceans often steal genes from bacteria ” at Eurekalert
One wonders how much of their genome they steal from more closely related species (as opposed to schoolbook Darwinian evolution).
Paper. (open access)
See also: Horizontal gene transfer: Sorry, Darwin, it’s not your evolution any more