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改良玉米群体的一般配合力(GCA)通常采用轮回选择的方法。但对为此目的的最佳测验种却没有一致的看法。70年代前,广为接受的是利用遗传基础狭窄的测验种尤其是自交系可改良特殊配合力(SCA),而对一般配合力的改良几乎无益。故基本上都是用遗传基础广泛的测验种来改良一般配合力。1973至1977年间有几项研究指出,通过与遗传基础广泛且无亲缘关系的群体杂交,用自交系作测验种不仅使
The general combining ability (GCA) of improved maize populations usually adopts the method of reincarnation. However, there is no consensus on the best test for this purpose. It was widely accepted prior to the 1970s that the improvement of special combining ability (SCA) using narrow genetic basis test varieties, in particular inbred lines, was almost unhelpful for the improvement of general combining ability. It is basically a wide range of genetic basis to improve the general test with the ability. Several studies between 1973 and 1977 indicated that using inbred lines as test species, by crossing with a largely genetic and non-related population,