An Evaluation Protocol for Fire Blight Resistance of Pear Cultivars

LIU Zhenya; SU Xuanle; TANG Li; LEI Chenhao; LI Yapeng; DAN Hongxia; ZHANG Wangbin

doi:10.19303/j.issn.1008-0384.2024.05.013

Volume 39 Issue 5

May 2024

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Article Navigation > Fujian Journal of Agricultural Sciences > 2024 > 39(5): 609-614

LIU Z Y, SU X L, TANG L, et al. An Evaluation Protocol for Fire Blight Resistance of Pear Cultivars [J]. Fujian Journal of Agricultural Sciences，2024，39（5）：609−614 doi: 10.19303/j.issn.1008-0384.2024.05.013

Citation:

LIU Z Y, SU X L, TANG L, et al. An Evaluation Protocol for Fire Blight Resistance of Pear Cultivars [J]. Fujian Journal of Agricultural Sciences，2024，39（5）：609−614 doi: 10.19303/j.issn.1008-0384.2024.05.013

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An Evaluation Protocol for Fire Blight Resistance of Pear Cultivars

doi: 10.19303/j.issn.1008-0384.2024.05.013

Tarim University/The National and Local Joint Engineering Laboratory of High Efficiency and Superior Quality Cultivation and Fruit Deep Processing Technology of Characteristic Fruit Trees in South Xinjiang/Key Laboratory of Xinjiang Production and Construction Corps in Comprehensive Agricultural Pest Management in Southern Xinjiang/Scientific Observing and Experimental Station of Crop Pests in Alar, Ministry of Agriculture and Rural Affairs, Alar, Xinjiang　843300, China

Received Date: 2023-06-26
Rev Recd Date: 2023-09-22

Available Online: 2024-06-26

Publish Date: 2024-05-28

Abstract

Abstract

Objective A simple method to evaluate the fire blight disease resistance of pear cultivars was developed. Method Fruits of 77 pear germplasms, including 36 cultivars and 41 hybrid progenies of Korla fragrant pear, were artificially infected with Erwinia amylovora at young, expansion, and ripening stages to examine the pathogenic responses. A protocol for grading the disease resistance of the germplasms was proposed. Results It appeared that, 24 h after an artificial E. amylovora inoculation, the fruits at young stage more than at expansion or ripening stage displayed symptoms sufficient for an effective assessment of the resistance of the pear plants. Using the method, significant variations on the disease resistance were observed on the 77 germplasms. Of the cultivars, 13 were shown to be highly susceptible to the infection, 11 susceptible, 27 moderately susceptible, and 26 resistant (i.e., 33.77% of the total). Conclusion The system to evaluate and determine the resistance of a pear cultivar to fire blight was developed. It was based on the response of the young fruits to a pathogenic inoculation with E. amylovora. In 24 h after the artificial infection on the fruits, 26 of the 77 sampled germplasms were determined to be resistant to the disease and could be used for breeding purposes.
- pear,
- Korla fragrant pear,
- hybrid progenies,
- Erwinia amylovora,
- resistance,
- evaluation

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References(20)

References

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