文献类型： 外文期刊
作者： Zhang, Man 1 ; Yang, Xingping 1 ; Xu, Jinhua 1 ; Liu, Guang 1 ; Yao, Xiefeng 1 ; Ren, Runsheng 1 ;
作者机构： 1.Jiangsu Acad Agr Sci, Inst Vegetable Crops, Jiangsu Key Lab Hort Crop Genet Improvement, Nanjing 210014, Jiangsu, Peoples R China
关键词： Fusarium oxysporum; Grafted watermelon; Resistance; Rootstock; Root rot
期刊名称：EUROPEAN JOURNAL OF PLANT PATHOLOGY （ 2020影响因子：1.907； 五年影响因子：2.022 ）
ISSN： 0929-1873
年卷期： 2021 年 159 卷 1 期
收录情况： SCI
摘要： Root rot is an emerging disease of grafted watermelon in China that causes severe yield losses. The causal agents associated with this disease were characterized in this study. A total of 70 fungal isolates were recovered from infected roots, and the most prevalent isolates were identified as Fusarium oxysporum (31% of isolates recovered). F. oxysporum isolates induced typical root rot disease symptoms in pathogenicity tests, whereas the other isolates were nonpathogenic. On the basis of combined DNA sequence analyses, specific pathogenicity tests and root rot symptoms, the F. oxysporum was identified as F. oxysporum f. sp. radicis-lagenariae. We evaluated 37 bottle gourd rootstocks for resistance to F. oxysporum f. sp. radicis-lagenariae. The mean disease rating scores (DRSs) ranged from 1.1 to 4.0 at 20 days after inoculation. The rootstock 16S-71 was most resistant to infection. These findings provide useful information for the development of bottle gourd rootstocks with resistance to fusarium root rot and to manage this disease.
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