XI Yadong,QIAO Xin,FANG Chao,et al.Sichuan′s Eggplant Resistance to Phytophthora Blight Pathogen of Phytophthora capsici[J].Northern Horticulture,2020,44(14):8-17.[doi:10.11937/bfyy.20194195]
四川茄子对绵疫病菌Phytophthora capsici的抗性鉴定与评价
- Title:
- Sichuan′s Eggplant Resistance to Phytophthora Blight Pathogen of Phytophthora capsici
- Keywords:
- eggplant; eggplant phytophthora blight; Phytophthora capsici; tissues specific for disease resistance; disease resistance
- 文献标志码:
- A
- 摘要:
- 绵疫病是近5年四川茄子田间和储藏期最具毁灭性的病害，其病原菌Phytophthora capsici对植株和果实均具强致病性。以四川省市售的48个商品种为靶标，研究其对绵疫病主要病原菌Phytophthora capsici的抗性鉴定和评价。结果表明：排除5号（“世纪骄子”）和47号（“龙F1”）出苗差外，实际参鉴的46个品种中，不同品种茄子植株在接种7 d后的病情指数最高为96.51（“阳春三月茄”），最低为12.09（“竹丝茄”）；聚类分析中，“春秋墨茄”和“竹丝茄”的病株率和病情指数均聚在一起，室内植株抗性表现为中抗，其它2个品种表现为感病、42个品种表现为高感；对46个品种的病情指数和病株率的Kmeans线图进行分析，可分为6类不同发生发展模式，病情指数的Kmeans线图相比病株率的Kmeans图更具规律性和代表性，其中Cluster4类群（包含“春秋墨茄”和“竹丝茄”）的植株病情指数Kmeans线图可作为后续筛选抗性品种的模式图。对46个品种的果实进行接种和抗病性鉴定，结果表明46个品种的果实均高感茄子绵疫病菌Phytophthora capsici，未发现果实抗病的品种，包括对植株具有中抗水平的“春秋墨茄”和“竹丝茄”，果实均高感由Phytophthora capsici引起的茄子绵疫病。“春秋墨茄”和“竹丝茄”植株对Phytophthora capsici具有一定抗性，而果实却表现高感，可作为后续抗性的组织特异性深入研究。
- Abstract:
- Phytophthora blight is the most destructive diseases in recently five years in Sichuan fields and storage periods,and pathogen Phytophthora capsici have the strong pathogenicity on plants and fruits of eggplant of China.Forty-eight varieties of eggplant were used to identify the resistance of phytophthora blight，but two of them were excluded owing to bad germinating.The results showed that,in practical trials，only 46 varieties used in experiments.Diseases indexes of plants showed in different varieties,the highest of it was 96.51 on variety ‘Yangchunsanyue’ and the lowest was 12.09 for variety ‘Zhusi’ eggplant.The varieties ‘Chunqiumoqie’ and ‘Zhusi’ eggplant were all gathered together in identical cluster by clustering analysis respectively for the disease indexes and disease plant rates.For the plant resistance,two of them all showed moderate resistance to Phytophthora capsici,the other two varieties susceptible,and the remaining 42 varieties high susceptible.Analysis of Kmeans charts of diseases indexes and diseased plant rates,46 varieties could classify into six kinds of occurrence and development.The disease index was more suitable for evaluate the eggplant variety resistant to Phytophthora capsici in the sides of disciplinary and representativeness.In six classified Clusters,the Cluster4 possessed the varieties ‘Chunqiumoqie’ and ‘Zhusi’ eggplant represent the resistant plant groups,in which their Kmeans chart could be used the model pattern to select the resistant varieties in the future.The fruit of eggplant trials were carried out used to verificate of resistance results in plants.The results showed that the fruits of all varieties were highly susceptible to Phytophthora capsici including the varieties ‘Chunqiumoqie’ and ‘Zhusi’ eggplant,even though，showed the moderate resistance on the plant of eggplant.The differential resistance results on different organs of one plant，that are varieties ‘Chunqiumoqie’ and ‘Zhusi’ eggplant，should be intensive studied to elucidate the mechanism in resistance of tissue specificity.
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备注/Memo
第一作者简介：席亚东（1981-），男，硕士，副研究员，现主要从事蔬菜病害抗病性鉴定与绿色防控等研究工作。E-mail：xiyadong2002@126.com.基金项目：四川省财政专项资金资助项目（2017CYTS-018）；四川省科技计划资助项目（2016NYZ0053-1-7）；国家重点研发计划资助项目（2018YFD0201210）；国家现代农业产业技术体系四川蔬菜创新团队专项资金资助项目（2019-2023）；蔬菜品种改良与种质创新四川省重点实验室专项基金资助项目（sczds2019-1）。收稿日期：2020-03-11