3 ms·
From the abstract of the Nature article (open): https://www.nature.com/articles/s41467-018-03281-1 https://www.nature.com/articles/s41467-018-03281-1 There is
by gilleain 9y ago
From the abstract of the Nature article (open):
https://www.nature.com/articles/s41467-018-03281-1 https://www.nature.com/articles/s41467-018-03281-1
There is :
>In comparison with other insects, expansions of gene families in P. americana exist for most core gene families likely associated with environmental adaptation, such as chemoreception and detoxification.
And from the body of the paper:
>In contrast, the increase in gene number in cockroaches is mainly attributed to their expansion of universal genes in the 12 species we analyzed
Specifically, for the American cockroach:
>The gene sets of P. americana and B. germanica contained 13,555 and 10,107 multicopy universal genes, respectively, while the highest number of such genes in other insects was only 7708.
So it seems like it is both that 60% is repetitive elements, and there are multiple copies of these 'universal' genes, where 'universal' means:
> Universal groups represent common gene families across all species analyzed, but absence in at most one genome is tolerated;