Six mutant lines resistant to the disease were finally selected. The disease reaction under the laboratory test is shown in Table 2 compared with the original parent and two check cultivars. The results from the 2005 trials, the six lines gave average grain yield of 2.24-2.33 t/ha, 74-81% higher than that of the original parent under natural disease infections (Table 2). The yield reduction of the parent and check cultivars was due to the susceptibility to the disease leading to a decrease in the number of seeds per pod. Under no SCL disease symptom in the 2006 trial, the orginal parent gave the highest yield of 3.76 t/ha resulted from the highest number of pods per plant. However, the six mutants produced higher grain yield than the check cultivars. The mutant lines are being tested for their adaptability in farmers’ fields.