1. Department of Agronomy; Iowa State University; Ames Iowa 50011 USA
2. Department of Horticulture, Botany and Landscaping; University of Lleida; Lleida 25003 Spain
3. School of Natural Sciences, Zoology; Trinity College Dublin; University of Dublin; Dublin 2 Ireland
4. Department of Animal and Plant Sciences; University of Sheffield; Sheffield S10 2TN UK
5. Department of Plant and Environmental Sciences; University of Copenhagen; Copenhagen 1165 Denmark
6. School of Biosciences; University of Melbourne; Melbourne Victoria VIC 3010 Australia
7. Department of Plant Pathology and Weed Research; Newe Ya'ar Research Center; Agricultural Research Organization; Ramat Yishay 30095 Israel
8. Agrosystems Research; Wageningen UR; Wageningen 6708 PB The Netherlands
9. Institute of Agro-environmental and Forest Biology; National Research Council; Legnaro 35020 Italy
10. Graduate Group in Plant Science; School of Agriculture; Federal University of Rio Grande do Sul; Porto Alegre, Rio Grande do Sul 91501-970 Brazil
11. School of Plant Biology; Australian Herbicide Resistance Initiative and Institute of Agriculture; University of Western Australia; Crawley Western Australia WA 6009 Australia