重施种肥是春小麦提高穗粒数的有效措施。
More application of seeding-fertilizer is an effective method for increasing grain number per ear.
结果表明：穗长对产量的效应最大，其次是行粒数、穗粗、穗行数。
The results showed that the effect of ear length on maize yield is the greatest.
总粒数与其它性状相关不显著。 目标性状的重组率以回交后代为高。
The recombination rate of the target traits was higher in backcross generations than in the other segregation generations.
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