Funding for this research was provided by:
National Institute of Food and Agriculture (2013-67015-20951)
United States - Israel Binational Agricultural Research and Development Fund (US-4997-17)
Received: 7 December 2018
Accepted: 21 February 2019
First Online: 7 March 2019
Ethics approval and consent to participate
: The research did not involve any experiment on animals and for this reason no ethics approval was necessary. The DNA samples for animals included in this study were extracted from semen straws collected by the Cooperative Dairy DNA Repository (CDDR).
: Not applicable.
: The authors declare that they have no competing interests except that George Liu is a member of the editorial board (Associate Editor) of this journal.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.