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玉米杂种第一代的优势是指杂交后第一代植株上结的果穗粗大、籽粒产量高而言。那么,在杂交制种过程中即从受粉到籽粒成熟阶段内有无杂种优势呢?为了探讨这个问题,作者从1977年到1980年连续作了同一个玉米果穗上既有自交粒又有杂交粒的对比试验。这项试验是在人工套袋,严格的控制条件下进行的。其作法是:取本株上的花粉后在混八等量异品种的花粉,充分混合后授到事先套袋的本株雌果穗的花丝上。这样做是确保除花粉不同之外,其它条件完全相同。收获脱粒
The advantage of the first generation of maize hybrids is that the ear of the first generation after the hybridization is coarse and the grain yield is high. So, during the process of hybrid seed production, ie, from the stage of powder to grain ripening, are there any heterosis? In order to explore this problem, the author made the same maize ear both self-hybridized and hybridized from 1977 to 1980 Granular contrast test. This test is carried out under artificial bagging and under strict control. The practice is: take this plant after the pollen in the same amount of eight different varieties of pollen, after mixing well received prior bagging of the female ear of the filament. This is done to ensure that the conditions are the same except for pollen. Harvest threshing