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杂交粳稻的选育与利用，曾经为辽宁省水稻生产的发展起到重要作用，使水稻的单产大幅度提高，年最高种植面积十余万公顷。然而、五”期间面积下滑，跌入低谷。究其原因，主要是老组合竞争优势不强，抗倒性差，制种效益低等［’］。辽代3225的选育成功是辽宁省杂交粳稻育种史上
The breeding and utilization of japonica hybrid rice has played an important role in the development of rice production in Liaoning Province, which has greatly increased the yield of rice and the annual planting area of more than 100,000 hectares. However, during the five-year period, the area dropped into a trough, mainly due to the weak competitive advantages of the old combination, poor lodging resistance and low efficiency of seed production [’]. The successful breeding of Liaoning 3225 was the success of Liaoning japonica hybrid rice Breeding history