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| Development of Field Disease Grading Standard and Germplasm Screening for Black Rot in Cabbage |
| CHEN Guo1，2，KONG Congcong1，MA Hongxue1，DENG Siping1，JI Jialei1，3，WANG Yong1，3，ZHUANG Mu1，3，ZHANG Yangyong1，3，YANG Limei1，3，GUAN Huiming3，FANG Zhiyuan1，2，3，LYU Honghao1，3* |
| 1Institute of Vegetables and Flowers，Chinese Academy of Agricultural Sciences，Key Laboratory of Biology and Genetic Improvement of Horticultural Crops，Ministry of Agriculture and Rural Affairs，Beijing 100081，China；2College of Horticulture，Hunan Agricultural University，Engineering Research Center for Horticultural Crop Germplasm Creation and New Variety Breeding，Ministry of Education，Key Laboratory for Vegetable Biology of Hunan Province，Changsha 410128，Hunan，China；3Cold Vegetables Academician Workstation，Ulanqab 012000，Inner Mongolia，China |
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Abstract Black rot is the main bacterial disease affecting cabbage production．To accelerate breeding process for resistance to black rot，55 cabbage accessions were screened for black rot resistance in the field between 2020 and 2021 in Ulanqab，Inner Mongolia，China．As a result，a set of black rot disease grading standard suitable for field identification was developed，and 8 black rot resistant accessions（DI ＜ 30）were screened，including 2 highly resistant accessions ‘05-574’ and ‘20-2-5’．The establishment of this standard and the availability of resistant accessions provide a reference for accelerating the breeding of black rot resistance in cabbage．
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Received: 15 January 2022
Published: 16 February 2022
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