Policy options for advancing seed systems for vegetatively propagated crops in Vietnam

[1 ]International Potato Center, Hanoi, Vietnam

[2 ]International Center for Tropical Agriculture, Bac Tu Liem, Hanoi, Vietnam

[3 ]Department of Agricultural, Food and Resource Economics, Michigan State University, East Lansing, USA

[4 ]International Center for Tropical Agriculture, Palmira, Colombia

[5 ]International Potato Center, Lima, Peru

[6 ]International Food Policy Research Institute, Washington D C, USA