Fig. 1

Frequency distribution of disease severity in the CNDH population and the parental lines Cheongcheong (resistant) and Nagdong (susceptible) in response to rice brown spot. CC, Cheongcheong; ND, Nagdong. Disease severity was scored based on the percentage of leaf area diseased: 1 = < 1%; 2 = 1–3%; 3 = 4–5%; 4 = 6–10%; 5 = 11–15%; 6 = 16–25%; 7 = 26–50%; 8 = 51–75%; 9 = 76–100%.