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文中研究对白叶枯病菌群Ⅰ到Ⅴ的抗性间及其与石炭酸反应的相关性,并提出一种有效的抗性选择方法。连锁关系的分析表明,Xa—1,Xa—kg和ph三个位点彼此紧密连锁。实验结果表明对菌群Ⅱ、Ⅲ和Ⅳ的数量抗性与受基因Xa—1h控制的对菌群Ⅰ的质量抗性相关,且菌群Ⅱ、Ⅲ、和Ⅳ的侵染度与控制质量抗性的基因剂量成反比。该研究结果亦适用于对菌群Ⅱ、Ⅲ和Ⅳ的数量抗性与受Xa—kgh控制的菌群Ⅴ的质量抗性和ph控制的石灰酸反应之间的关系。实验结果表明源于IR28的数量抗性除对菌群Ⅱ、Ⅲ和Ⅳ外,对菌群Ⅰ和Ⅴ也有效。F_2子代的选择试验表明:利用对菌群Ⅲ的抗性结合石灰酸反应对IR28的衍生系进行抗性选择乃是最适应的选择方法,从而有可能省去接种菌群Ⅰ、Ⅱ、Ⅳ。这种选择方法也适用于以IR29为抗源的杂种群体。
In this paper, we studied the correlation between the resistance to bacterial leaf blight I to V and the reaction with carbolic acid, and proposed an effective resistance selection method. Linkage analysis showed that Xa-1, Xa-kg and ph three sites closely linked to each other. The experimental results show that the quantitative resistance to the colonies II, III and IV is related to the quality resistance to the strain I controlled by the gene Xa-1h, and the infection of the colonies II, III, and IV is related to the control of mass resistance Sexual gene dosage is inversely proportional. The results of this study also apply to the relationship between the quantitative resistance of the colonies II, III and IV to the mass resistance of the strain V controlled by Xa-kgh and the pH-controlled lime acid reaction. The experimental results show that the quantitative resistance derived from IR28 is also effective against strains I and V, except for strains II, III and IV. F_2 progenies selection experiments showed that: the use of resistance to bacteria group Ⅲ combined with lime reaction of IR28 derived line resistance selection is the most suitable selection method, which may save vaccination flora Ⅰ, Ⅱ, Ⅳ . This selection method also applies to IR29-resistant hybrid populations.