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水稻杂种优势的表现,前人已作过部分研究,初步的结论是:水稻的杂种优势具有遗传多样性。那么,灿、粳交F_1代杂种优势有哪些特点呢?本文拟讨论这个问题。 1 材料和方法 1984年组成珍汕97×城堡_2、桂朝_2×城堡_2、珍汕97×密阳_(23)桂朝_2×密阳_(23)桂朝_(13)×密阳_(23)、川新糯×密阳_(23)等6个杂交组合。密阳_(23)是南朝鲜用籼梗交育成的偏籼型品种,城堡_2是日本用籼粳交育成的偏粳型品种。杂交时
The performance of rice heterosis, the predecessor has made some research, the preliminary conclusion is: the heterosis of rice genetic diversity. So, Can, japonica cross F_1 hybrids what are the characteristics? This article is to discuss this issue. 1 Materials and methods 1984 composed of Zhenshan 97 × Castle _2, Gui North _2 × Castle _2, Zhenshan 97 × Miryang _ (23) Gui _2 × Miryang _ _ _ ) × Mieyang_ (23), Chuanxinuo × Mieyang_ (23) and other six hybrid combinations. Mianyang_ (23) is an indica-type variety bred by indica rice in South Korea. Castle_2 is a japonica-japonica variety that is bred by indica and japonica in Japan. When crossing