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利用射线或化学物质处理六棱皮大麦“竹林茨城1号”品种,从中诱发出150个早熟突变系统,将其栽培在感染黄花叶病毒病的田间,结果选出了一个表现高抗的系统(编号为 Ea52)。原品种及其它全部系统均呈现黄花叶病毒病特有的病症——植株矮化和叶片黄化,而 Ea52则表现生育正常。对 Ea52与罹病系统 Ea17的杂交后代 F_2植株的病症有无及株重作了调查。结果查明,Ea52的抗病性是由单基因向隐性方向突变产生的。Ea52对黄花叶病毒的抗性在遗传上与早熟性无关。用直接负染法对叶片的电镜观察表明:原品种除了罹大麦黄花叶病毒(BYMV)外,还感染土传小麦花叶病毒(SBWMV);而 Ea52的正常植株对 BYMV 和 SBWMV 均示抗性。
The use of radiation or chemical treatment of six-rowed barley “bamboo forest Ibaraki 1” varieties, which induced 150 early-maturing mutation system, which is cultivated in the field infected with yellow mosaic virus disease, the results selected a system of high resistance Numbered Ea52). The original breed and all other systems present the unique disease of yellow mosaic virus disease - plant dwarfing and leaf yellowing, whereas Ea52 shows normal fertility. The presence and absence of strain and the plant weight of the F2 progeny of hybrid progeny Ea52 and diseased system Ea17 were investigated. The results showed that the resistance of Ea52 was caused by a single gene mutation in the recessive direction. Resistance to yellow mosaic virus Ea52 is not genetically related to early maturity. Electron microscopy observation of the leaf by direct negative staining showed that the original variety was infected with SBWMV in addition to BYMV, while the normal plants of Ea52 were resistant to both BYMV and SBWMV .