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在梨树杂交育种工作中,总结分析了梨树不同亲本子代在抗腐烂病遗传上的变异倾向。指出子代在抗病力上的遗传受亲本制约,为多基因控制的数量遗传,抗病育种时要特别注意亲本的选配。西宁北郊,地高天寒,低温持续时间长,果树受冻后常导致腐烂病大量发生,严重者可使果树死亡。据对我院梨树品种园100余个品种,400余株的调查,腐烂病病株占整个植株的80％以上,死株率为1—2％,严重影响了梨树的生长发育,使产量低而不稳。因此,在育种过程中研究不同亲本子代抗腐烂病的遗传倾向,为育种提供选择亲本,就成了高寒地区一个不可忽视的技术指标。
In the hybridization and breeding of pear tree, the genetic variation tendency of different progeny of pear cultivars was analyzed. It is indicated that the offspring’s genetic resistance to disease resistance is restricted by the parents, and the quantity is controlled by the multiple genes. Special attention should be paid to the matching of the parents when breeding disease-resistant. The northern suburbs of Xining, high and cold, low temperature for a long time, fruit trees often lead to rot disease occurs in large quantities, in serious cases can cause death of fruit trees. According to a survey of more than 100 varieties and more than 400 strains of pear tree species in our hospital, the total number of decayed diseased plants accounted for more than 80% of the total plants and the dead strain rate was 1-2%, which seriously affected the growth and development of pear trees. Low yield and unstable. Therefore, it is an indispensable technical index to study the genetic tendency of different progeny anti-rot disease in breeding process and to provide the selective parents for breeding.