摘要
本文对利用无融合生殖固定水稻杂种优势的策略进行了讨论。提出该研究可分三步进行：１．确定无融合生殖水稻的基本要求，即后代不分离，发育良好的胚乳，显性核基因控制的专性无融合生殖。其中获得不分离的后代有三条途径：二倍体孢子生殖，体细胞无孢子生殖，珠心、珠被等体细胞胚挤入胚囊取代合子胚发育；２．从栽培稻、野生稻及其远缘物种，特别是早熟禾属、狼尾草属等具无融合生殖特性的材料中挑选无融合生殖材料；３．利用常规杂交、杂交与组织培养结合以及基因转移方法向水稻引入无融合生殖基因。
The tactics of fixing hybrids vigor of rice by apomixis are discussed in this article. Three steps of the research are posed. First, the basal demands of apomictic rice are determined. They are unsegregated offspring. Well developed endosperm, dominant nuclear gene controled obligate apomixis. There are three pathways to be obtained unsegregated offspring, i. e.diploidy spory. somatic apospory,somatic embryo derived from nucellus or integument squeezed into embryo sac and grew instead of zygot embryo. Second, it is screened apomictic materials from cultivated rice, wild rice and their distant related species, espicially Poa and Pennisetum etc. with the apomictic character. Third, it is introduced apomictic gene into rice by conventional cross, combination of conventional cross and tissue culture method, and gene transfer technique.
出处
《杂交水稻》
CSCD
北大核心
1989年第6期1-3,22,共4页
Hybrid Rice
