关键词: 苹果, 种质资源, 苹果轮纹病, 苹果轮纹病菌, 抗病性评价

Abstract: One hundred and eighty-nine Malus germplasms accessions were tested by use the method of artificial inoculating branches identification with ZZ26 and field identification in their resistance to Apple ring rot. Based on these identification results，the resistance of the germplasms was classified and assessed. The results showed that there were significant difference in the resistance among accessions and no Malus germplasm tested was found immune to Apple ring rot. By artificial inoculation，the 189 Malus germplasms were grouped into four groups of 16 highly resistant，75 medium resistant，81 medium susceptible and 17 highly susceptible varieties. By field identification，that of all the germplasms were grouped into three groups and 144 accessions were highly resistant，44 medium resistant，1 medium susceptible in 2012，and 14 accessions were highly resistant，162 medium resistant，13 medium susceptible in 2013. No highly susceptible germplasm was found in two years. Another investigation in 2017，the results showed that the consistency rate of field identification and artificial inoculation identification improved with plantation age increasing gradually，and 13.23% in 2012，38.62% in 2013，and reached 57.14% in 2017. With comprehensive disease resistance screening，we got better consistency germplasms of 2 highly resistant were Kitanosach and Qinguan.

Key words: Malus, germplasm resource, Apple ring rot, Botryosphaeria berengriana f. sp. piricola, resistance evaluation