玉米F1杂种与其F2代之间的数量和质量差异。
The quantitative and qualitative difference between a F1 hybrid of maize and its F2 generation.
作者信息
Engelen Steven, Reheul Dirk, De Cauwer Benny
机构信息
Ghent University, Department of Plant Production, Coupure links 653, B-9000 Gent, Belgium.
出版信息
Commun Agric Appl Biol Sci. 2004;69(1):41-7.
The majority of modern maize varieties are single F1 hybrids. The yield performance of the F2 generation is known to be inferior to the F1 yield performance. We crossed several F1 hybrids and compared these crossings, together with true F2 generations, with the original F1s. Compared to the F1 generation, biomass yield in the F2 generation dropped with -26.7%, and with -8.7% in the crossings. Ear yield dropped with -35.3% and -10.7% respectively. F2 generations had a reduced early vigour and the ear filling startedlater. The yield of some F1 diallel crosses was not significantly different from the yield of the parental F1s.
大多数现代玉米品种是单交F1杂种。已知F2代的产量表现低于F1代。我们将几个F1杂种进行杂交，并将这些杂交种以及真正的F2代与原始F1进行比较。与F1代相比，F2代的生物量产量下降了26.7%，杂交种下降了8.7%。穗产量分别下降了35.3%和10.7%。F2代的早期活力降低，灌浆开始较晚。一些F1双列杂交种的产量与亲本F1的产量没有显著差异。
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