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从形态、染色体及分子水平上证实 ,转基因不结球白菜 (Brassicacampestrisssp .chinensisvar.utilisTsenetLee)中编码除草剂Basta抗性的bar基因能在田间条件下 ,经自然传粉 ,以较高频率侵入芜菁 (B .campestrisssp .rapifera)、结球白菜 (B .campestrisssp .pekinensis)和不结球白菜 (B .campestrisssp .chinensis)的基因组中 ,也能少量侵入同属异种的甘蓝型油菜 (B .napus)基因组中 ;在温室人工辅助授粉条件下 ,除在上述种中的基因漂移率提高外 ,bar基因尚能以一定频率侵入同属的黑芥 (B .nigra)、埃塞俄比亚芥 (B .carinata)、芥菜 (B .juncea)基因组中 ,但始终未能得到转基因白菜与结球甘蓝 (B .oleracea)、萝卜 (R .sativus)的杂种。转基因白菜与十字花科的 7种常见杂草经温室人工辅助授粉 ,也均未得到抗性杂种
It was confirmed from morphological, chromosomal and molecular levels that the bar gene encoding Basta resistance in transgenic Brassica campestrisssp .chinensisvar.utilisTsenetLee was able to invade turnip at higher frequency through natural pollination under field conditions B. campestrisssp. Rapherae, B. campestrisssp. Pekinensis and B. campestrisssp. Chinensis could invade into the genome of the same species in B. napus Under the condition of artificial pollination in greenhouse, bar gene can invade B. Nigra, Ethiopia b. Carinata, B mustard (B . juncea) genome, but the transgenic cabbage and cabbage (B.oleracea), radish (Rsativus) hybrids. Seven common weeds of transgenic cabbage and Cruciferae were artificially pollinated by greenhouse and no resistant hybrids were obtained