Nature Ecology & Evolution 1, 0119 (2017); published 3 April 2017; corrected 24 April 2017.
This Article should have been published under a Creative Commons licence according to the Nature policy on publishing the primary sequence of an organism's genome for the first time. The manuscript is now open access and published under a CC-BY licence. All versions of the Article have been modified accordingly.
The online version of the original article can be found at 10.1038/s41559-017-0119