1. Center for Quantitative Genetics and Genomics, Aarhus University, Blichers Allé 20, 8830 Tjele, Denmark.
2. Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg, Denmark.
3. Department of Biology, Aarhus University, Ny Munkegade 116, 8000 Aarhus C, Denmark.