Concluding studies on the multiple-herbicide resistance mechanism of Echinochloa oryzicola and its inheritance

对1966年在美国加利福尼亚州萨克拉门托稻区发现的水稻杂草棘豆抗多剂生物型的抗性机制(S)及其遗传进行了研究。研究结果表明，多重除草剂抗性生物型表现为：10个细胞色素P450的基因表达，多组控制除草剂抗性的等位基因。没有与4种不同除草剂抗性相关的AFLP标记的基因座。几个抗性生物型材料的种子休眠比相应的感病生物型材料的种子休眠浅。

The multiple-herbicide resistant biotype of a rice paddy weed Echinocloa oryzicola, which was found in 1966 at the rice production area of Sacramento, California, was studied on the resistant mechanism(s) and its inheritance. Results of the studies exhibited that the multiple-herbicide resistant biotype showed :Gene expression of 10 cytochrome P450s.Plural sets of alles that govern the herbicide resitance.No genotypic locus of AFLP markers commonly relating to the resistance to the four different herbicides.Several accessions of the resistant biotype had shallower seed dormancy than the counterpart of susceptible biotypes that varied in the depth of seed dormancy.