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经过3代自交纯化与稻瘟病抗性鉴定,在1500份普通野生稻(Oryza rufipogon Griff.)中发现38份抗病材料,在113份药用野生稻(O.officinalis Wall.ex Watt.)中发现18份抗病材料。普通野生稻和药用野生稻相同材料在不同年份的田间病区诱发鉴定中,各级抗性植株分布差异不显著,鉴定结果表现一致。与普通野生稻相比,广西药用野生稻抗性基因发生的频率显著较高、抗性稳定,是一种特殊抗性类型,从中获得具有重要利用价值的新抗性基因的可能性较大。研究还表明,自交提纯能够明显提高这两种野生稻的平均抗性水平。在田间病区诱发条件下,广西普通野生稻抗性材料出现的频率与地区居群的遗传多样性没有显著相关性。
After 3 generations of selfing purification and blast resistance identification, 38 resistant materials were found in 1500 Oryza rufipogon Griff. In O. officinalis Wall. Ex Watt. In the discovery of 18 disease-resistant materials. The same materials of common wild rice and medicinal wild rice in different years in the field of ward induction identification, the distribution of resistant plants at all levels was not significantly different, the identification of the same performance. Compared with O. officinalis, the resistance gene of O. officinalis was significantly higher in frequency and stable in resistance, which is a special type of resistance. Therefore, it is more likely to obtain the new resistance gene with important utilization value . The study also showed that the self-purification can significantly improve the average level of resistance of the two wild rice. Under the condition of field ward induction, there was no significant correlation between the frequency of occurrence of O. japonica resistance material and the genetic diversity of regional population.