14个红肉苹果种质资源对梨火疫病的抗病性鉴定及评价

Identification and evaluation of resistance of 14 Malus sieversi f.neidzwetzkyana(Dieck)Langenf.germplasm resources to pear fire blight

以14个红肉苹果种质资源为试材,通过嫩叶和嫩枝离体接种,鉴定评价其对梨火疫病的抗性差异,筛选抗梨火疫病的红肉苹果种质资源。结果表明,14个红肉苹果种质资源的嫩叶及嫩枝整体上对于梨火疫病的抗病性以感病(S)为主,嫩叶感病(S)种质占比为57.14%,嫩枝感病(S)种质占比为71.43%,未筛选出高抗(HR)及抗病(R)红肉苹果种质资源,仅1份红肉种质‘夏’的嫩叶表现出中抗(MR),嫩枝中感(MS),综合抗病能力在14个红肉苹果种质资源中最强,可为今后红肉苹果的抗病育种提供理论依据。

The pear fire blight resistance of 14 Malus sieversi f.neidzwetzkyana(Dieck)Langenf.germplasm resources was evaluated by in vitro inoculation of young leaves and shoots,and the pear fire blight resistant Malus sieversi f.neidzwetzkyana(Dieck)Langenf.germplasm resources were screened.The results showed that the young leaves and shoots of 14 Malus sieversii f.neidzwetzkyanaa(Dieck)Langenf.germplasm were mainly susceptible to fire disease(S),the proportion of young leaves susceptible to disease(S)was 57.14%,and the proportion of shoots susceptible to disease(S)was 71.43%,and the Malus sieversi f.neidzwetzkyana(Dieck)Langenf.germplasm with high resistance(HR)and resistance(R)were not screened.There is only one Malus sieversii f neidzwetzkyana(Dieck)Langenf.germplasm variety'Xia'that exhibits moderate resistance(MR)on young leaves,while showing moderate susceptibility(MS)on young shoots,demonstrating the strongest overall disease resistance among the Malus sieversi f.neidzwetzkyana(Dieck)Langenf.germplasm resources.This can provide theoretical basis for Malus sieversi f.neidzwetzkyana(Dieck)Langenf.breeding for disease resistance in the future.