Thesis Open Access

Introgression from Gorilla caused the Human-Chimpanzee split

Nygren, Johan

ABSTRACT: The Gorilla Genome Project (Scally, 2012) showed that 30% of the gorilla genome introgressed into the ancestor of humans and chimpanzees, and that the two species diverged through lineage sorting with 15% ending up in Pan and another 15% in Homo. That introgression is the Pan-Homo split, hybridization, which led to speciation as the new hybrid lineages became reproductively isolated from one another.

The NUMT on chromosome 5 (“ps5”) (Popadin, 2017) fits perfectly with the introgression speciation model, it was formed from mtDNA that had diverged from the common ancestor of Pan-Homo for 1.8 Myr at the time of insertion into the nuclear genome, and originated in the Gorilla lineage. The ps5 pseudogene was transferred to Pan and Homo during the introgression event that led to the Pan-Homo split, 6 million years ago.

Files (170.0 kB)
Name Size
Pan-Homo split via Gorilla introgression.pdf
md5:90fcd0b5aef0e132a9d23c4f126ac8fe
170.0 kB Download
2,626
606
views
downloads
All versions This version
Views 2,6261,182
Downloads 606143
Data volume 96.7 MB24.3 MB
Unique views 2,0861,021
Unique downloads 462132

Share

Cite as