回交是植物有性杂交育种的一种常用方法,是指以杂交后代的植株与两亲本品种之一再进行杂交的方法。在常规稻育种中,一般在原来栽培的品种已具有多数优良性状,但只有个别性状不符台要求需改进时采用。而三系杂交稻育种应用回交法较多,特别是雄性不育系的合成,主要靠回交法。下面谈谈我所应用回交选育不育系和恢复系等方面的情况,供同行们参考。 Backcross is a commonly used method of sexual crossbreeding in plants, and refers to the method of further crossing with one of the crossbreeding plants and one of the two parental varieties. In conventional rice breeding, the varieties generally cultivated in the original have the most excellent traits, but only when the individual traits do not meet the requirements of the table and need to be improved. The three-line hybrid rice breeding backcross application method more, especially male sterile lines, mainly by backcrossing method. Here to talk about my application of backcrossed sterile lines and restorers and other aspects of the situation for colleagues for reference.