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茶树炭疽病是日本最主要的茶树病害之一,薮北种对炭疽病抗性差,为此有必要研宄和观察薮北种后代在炭疽病抗性上的遗传问题。喷施每立方毫米8000～15000个的分生孢子悬液,其后20天所调查的结果比较理想:以薮北种作为双亲的后代,其抗性表现最弱;但用其它品种如Ak1440.F.288红立早生,G.343与薮北杂交,分别可以产生一定比例的抗性品种。由此可见亲本与子代和炭疽病的抗性上存在着高相关(r=0.823)。茶炭瘟病是通过茶叶上的茸毛(毛状体)侵染到叶内组织的,山细长的单细胞组成的茶叶茸毛,当在炭疽病病菌侵入的时候,内部细胞壁逐渐增厚,形成明显的胼胝体。抗病品种叶片上的茸毛细胞壁,由于本质化的次生壁发展,使胞壁增厚的速度快于感病品种,外观表现为高度抗病性。
Tea tree anthracnose is one of the most important tea tree diseases in Japan, and its resistance to anthracnose is poor. Therefore, it is necessary to study and examine the genetic problems of anthracnose resistance in northern Hebei offspring. Spraying from 8000 to 15000 conidia suspension per cubic millimeter, the result of 20 days after the survey was ideal. The resistance of the northern part of the population was the weakest in the progenies of the parents; however, other varieties such as Ak1440 were used. F.288 Hongliashengsheng, G.343 and Xubei hybrids, respectively, can produce a certain percentage of resistant varieties. Thus, there is a high correlation between parental and offspring resistance to anthracnose (r = 0.823). Tea charcoal plague is tea leaf hairs, which are infected by leaf hairs (trichomes) infested into the tissues of the leaves. When the anthracnose germs invade, the internal cell walls are gradually thickened to form obvious The corpus callosum. The hairy cell wall on resistant leaves of the resistant varieties developed thicker cell walls faster than the susceptible varieties due to the development of the essentially secondary wall and showed a highly resistant appearance.