| 摘要: |
| 【目的】明确辣椒抗疫病能力与植株农艺性状之间的关联，筛选和选育辣椒抗疫病品种。【方法】采用灌根法对45个辣椒不同自交系材料进行辣椒疫病盆栽试验，并测定植株部分农艺性状及生理生化指标。【结果】不同辣椒自交系对疫病的抗性存在较大差异，其中8个自交系(‘RT19-248’、‘RC17-555’、‘YJ 24’、‘NJ 07’、‘702’、‘298a’、‘CF19’和‘CF20’)的发病率低于20%，7个自交系(‘WangH242 1’、‘XJ 19’、‘NJ 08’、‘CB3’、‘CC4’、‘CC7’和‘CF9’)的发病率高于80%。与对照相比，接种疫霉菌20 d后辣椒植株株高、地上部鲜质量及氮含量等存在显著差异；相关性分析认为疫病发病率与植株株高及地上部鲜质量呈显著负相关，与地上部氮含量呈显著正相关。【结论】8个自交系(‘RT19-248’、‘RC17-555’、‘YJ 24’、‘NJ 07’、‘702’、‘298a’、‘CF19’和‘CF20’)可以作为选育高疫病抗性辣椒品种亲本，同时高秆、生长旺盛和耐低氮是高抗疫病辣椒品种的初步鉴定标准。 |
| 关键词: 辣椒 疫病 品种筛选 植物生长特性 |
| DOI：10.13207/j.jnwafu.2026.01.001 |
| 分类号: |
| 基金项目:国家重点研发计划项目(2023YFD1201502) |
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| Identification of phytophthora blight resistance of different pepper inbred lines and correlation analysis of plant functional traits |
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YANG Kaiwei1, ZHOU Yingying1, DU Jiao2, JIANG Pan2, LUO Gongwen2, OU Lijun1,3
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1.College of Horticulture,Hunan Agricultural University,Changsha,Hunan 410128,China;2.College of Resources,Hunan Agricultural University,Changsha,Hunan 410128,China;3.Key Labortory for Vegetable Biology of Hunan Province,Hunan Agricultural University,Changsha,Hunan 410128,China
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| Abstract: |
| 【Objective】The study aims to examine the correlation between phytophthora resistance of pepper and plant agronomic traits and to select and breed phytophthora resistance varieties of pepper.【Method】The irrigation method was employed to conduct a potted experiment on 45 different inbred lines of pepper.Agronomic traits as well as physiological and biochemical parameters were assessed.【Result】The results revealed significant variations in disease resistance among the inbred lines,and the incidence of eight inbred lines,including ‘RT19-248’,‘RC17-555’,‘YJ-24’,‘NJ 07’,‘702’,‘298a’,‘CF19’,and ‘CF20’,was less than 20%.Conversely,seven inbred lines,including ‘WangH242-1’,‘XJ-19’,‘NJ-08’,‘CB3’,‘CC4’,‘CC7’,and ‘CF9’,exhibited an incidence rate exceeding 80%.The plant height,aboveground fresh weight,and nitrogen content exhibited significant differences after 20 days of inoculation compared to the control group.Correlation analysis revealed a negative correlation between disease incidence and plant height and fresh weight,while a positive correlation was observed with nitrogen content.【Conclusion】Eight inbred lines (‘RT19-248’,‘RC17-555’,‘YJ-24’,‘NJ-07’,‘702’,‘298a’,‘CF19’,and ‘CF20’) possess the potential to serve as parental sources for developing highly blight-resistant pepper varieties.Strong stalks,vigorous growth,and low nitrogen tolerance are the preliminary identification criteria of pepper varieties with high blight-resistance. |
| Key words: Capsicum annuum epidemic disease variety selection plant growth characteristics |
