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杂交有种目前仍是选育水稻新品种的有效途径之一，但多年的育种实践表明，品种间杂交有种对提高水稻单产的潜力已经十分有限，要进一步提高单产，必须寻找新的优势种群，扩大品种亲源谱，加大亲本遗传差异，增大选择材料的遗传变异幅度，从而选育出高产优质多抗新品种。通过籼
Hybridization is still one of the most effective ways to breed new varieties of rice. However, many years of breeding practice have shown that there is very little potential for hybridization among varieties to increase yields of rice. To further improve yields, new dominant populations must be found , Expand the pro-source spectrum of varieties, increase the genetic difference of the parents and increase the genetic variation range of the selected materials so as to breed new varieties of high-yield, high-quality and multi-resistance. Through the indica