Acknowledgement
This study was financially supported by the Vavilov-Frankel Fellowship
to the first author under grant CONT/08/136/RF and the Leibniz Institute
of Plant Genetics and Crop Plant Research (IPK). We acknowledge
contribution and technical support from Christina Koch, Petra Oswald,
Birgit Wohlbier, R.S. Vodouhe, and Adam Ahanchede. We thank Augustin
Ganse for assistant in map making and Hanno Schaefer for useful comments
on the manuscript.