在三个矮秆雄性不育的水稻(O.satlua L)和一些高秆供粉水稻隔行种植混合传粉的条件下,研究了异交率。观察‘Calady’和‘Earlir-ose’的结实率。遗传性的雄性不育的结实率是很少的,表明它们对杂交种的生产或种群的改良都没有实用价值。‘Bir-Co’的细胞质雄性不育系的平均结实率1978年为5.4%,1979年为32.5%。1979年结实率明显提高是父母本的花期相遇较好。1979年其自交率为3.5%。 The outcrossing rate was studied under the conditions of intercropping of three dwarf male sterile rice (O.satlua L) with some high-yielding rice. Observe the seed set rate of ’Calady’ and ’Earlir-ose’. The heritability of hereditary male sterility is small, indicating that they are of no practical value for the production of hybrids or for the improvement of populations. The average seed setting rate of ’Bir-Co’ cytoplasmic male sterility lines was 5.4% in 1978 and 32.5% in 1979. Significantly increased the rate of seed set in 1979 is better at the flowering of parents. In 1979 the self-clinching rate was 3.5%.