Genetics Programme, Scottish Crop Research Institute, Invergowrie, Dundee, UK.|Genetics Programme, Scottish Crop Research Institute, Invergowrie, Dundee, UK.|Genetics Programme, Scottish Crop Research Institute, Invergowrie, Dundee, UK.|Genetics Programme, Scottish Crop Research Institute, Invergowrie, Dundee, UK.|Genetics Programme, Scottish Crop Research Institute, Invergowrie, Dundee, UK.|Genetics Programme, Scottish Crop Research Institute, Invergowrie, Dundee, UK.|Genetics Programme, Scottish Crop Research Institute, Invergowrie, Dundee, UK.|Genetics Programme, Scottish Crop Research Institute, Invergowrie, Dundee, UK.