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三、自交系的应用有些异花授粉作物,通过连续几代的自交选育,能够培育出具备各种特性的自交系。将具有不同特性的自交系进行杂交,或与某一品种杂交,就能得到具有优势的杂交种。如玉米的单交种、双交种、三交种、预交种,就属于自交系的应用。应用自交系还可以和雄性不育系或自交不亲和系联系起来,以解决去雄的问题。四、自交不亲和系的应用自交不亲和系,是指甘蓝等作物在正常开花的同一品系内,本株自交或株间异交都不易受精结实,而不同亲本的自交不亲和系之间,或自交不亲和系和品种之间则极易受精结实。优良的自交不亲和系是经过多代自交分离选育而成的。利用自交不亲和系这种特
Third, the application of inbred lines Some cross-pollination crops, self-cross breeding for generations, able to breed with inbred lines of various traits. Inbred lines with different traits are crossed, or crossed with a variety of varieties, will be able to get the advantages of hybrids. Such as single cross-species corn, double cross, three cross-species, pre-breeding, it belongs to the application of inbred lines. Inbred lines can also be used in conjunction with male sterile lines or self-incompatible lines to solve the problem of emasculation. Fourth, the application of self-incompatible lines Self-incompatible lines, refers to the cabbage and other crops in the same flowering in the same line, the self-self or cross between strains are not easy to fertilize, and different parents of self-cross Between incompatible lines, or between self-incompatible lines and varieties are extremely fertile and solid. Excellent self-incompatibility is the result of multiple generations of selfing and breeding. Use of self-incompatible lines such special