Abstract
A shattering-resistance gene in the mutant line, SR-1 induced from an iudica, semidwarf rice variety, Nan-jingll was mapped on chromosome I using seven RFLP markers. It was also found that the shattering-resistance mutant gene was linked to a semi-dwarf gene, sd-1, derived from Nan-jingll. Eighty plants of a F2 population derived from the crossing between SR-1 and a javanica rice variety, Dinalaga with shattering habit and long culm, were investigated for the degree of shattering, culm length and genotypes by RFLP markers. Although the segregation for the shattering degree and culm length was complex in the F2 population, a significant correlation (r = - 0.57* * ) between the shattering degree and culm length was detected. Thus the shattering resistance gene in SR-1 is likely to be linked to the semidwarf gene, sd-1, which has been mapped on chromosome I using RFLP markers(Ogi et al., 1993).
