Figure 1.

Seed germination of the parental lines and backcross recombinant inbred line (BRIL) population under natural storage. (a) Boxplot of germination rates after 1-, 2-, 4-, 6-month storage. The box edges indicate the range of the 25th to 75th percentiles with the mean value shown as the bold middle line. The whiskers represent the range of 5% to 95% of the data and outer dots are outliers. (b) Frequency distribution of seed storability as measured by P50, which is the time required for a reduction of viability to 50% under natural storage. Arrows indicate the means of parental lines Nipponbare (NIP) and 9311.