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杂种优势问题异花受精作物,杂交后的种子生长力较强,通称为杂种优势。这种优势在自花受精作物中很少或无,但在水稍杂交后,杂种优势特大。Jones 1926年试验结果,第一代杂种,稈数可增94%,产量可增164%。笔者1960年在东北农学院香坊实验农场所做的35个组合,经过两年的种植、观察和分析,杂种第一代表现有三种不同的情况,第一种情况是,有些组合的F_1,无论分叶数、株高、每穗粒数、单株重和穗重,均比父母本显著的增加,如北海1号×Dubrovisk、合江1号×早熟青森、新疆白芒×老头稻、新
Hybrid heterosis problems cross-fertilization crops, hybrid seeds after growing stronger, known as the heterosis. The advantage is that there are few or no self-fertilizing crops, but the heterosis is superb when the water is slightly cross-pollinated. Jones test results in 1926, the first generation of hybrids, the number of stalks can increase 94%, the yield can increase 164%. The author made 35 combinations in Xiangfang Experimental Farm of Northeast Agricultural College in 1960. After two years of cultivation, observation and analysis, the first representative of hybrids has three different situations. The first case is that some combinations of F_1, No matter the number of leaves, the plant height, the number of grains per panicle, the plant weight per panicle and the panicle weight were all significantly higher than those of their parents, such as Beihai 1 × Dubrovisk, Hejiang 1 × Aomori, Baimian × Laotai, new