Correction to: Nature https://doi.org/10.1038/s41586-018-0097-z, published online 09 May 2018.

In Fig. 2 of this Letter, the ‘E’ and ‘G’ clade labels were inadvertently reversed, and in Table 2 the genotype of DA27 was ‘D1’ instead of ‘D5’. These have been corrected online.