The Genome Analysis Centre (TGAC), Norwich Research Park, Norwich NR4 7UH, UK, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK and National Institute of Agricultural Botany (NIAB), Cambridge CB3 0LE, UK.|The Genome Analysis Centre (TGAC), Norwich Research Park, Norwich NR4 7UH, UK, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK and National Institute of Agricultural Botany (NIAB), Cambridge CB3 0LE, UK The Genome Analysis Centre (TGAC), Norwich Research Park, Norwich NR4 7UH, UK, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK and National Institute of Agricultural Botany (NIAB), Cambridge CB3 0LE, UK.|The Genome Analysis Centre (TGAC), Norwich Research Park, Norwich NR4 7UH, UK, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK and National Institute of Agricultural Botany (NIAB), Cambridge CB3 0LE, UK.