| 摘要: |
| 通过田间观测对菠菜抗霜霉病种质资源的植物学特性、生育周期和抗病性进行了鉴定.结果显示：59份菠菜种质资源的10个质量性状的多样性指数分布在0.25~1.23之间；8个数量性状变异系数在24.25%~42.80%之间，平均29.54%.霜霉病抗性鉴定结果表明：菠菜材料S1~S36为高抗材料，S37~S41为抗病材料，S42~S59为中抗材料.抽薹期性状调查结果表明：81.4%的材料属于抽薹早或中的材料，18.6%的菠菜材料属于抽薹晚的材料.综合考虑，菠菜材料S1株型直立，叶片卵圆、长势好、耐抽薹，试验期无任何霜霉病的病症，且霜霉病病情指数和发病率均为0，是植物学性状优良的抗菠菜抗霜霉病种质资源. |
| 关键词: 菠菜 霜霉病 种质资源 抽薹 |
| DOI：10.3969/J.ISSN.1000-5137.2021.02.017 |
| 分类号:S636.1 |
| 基金项目:上海市科技兴农项目（沪农科创字（2018）第2-5号）；上海市科研创新行动计划（19391900700）；上海市教育委员会第五批上海市属高校应用型本科试点专业建设（沪教委高〔2017〕79号） |
|
| Phenotype evaluation on downy mildew resistance of spinach germplasm resources |
|
DAI Yurou, MA Chenghao, PENG Feng, CAI Xiaofeng
|
|
College of Life Sciences, Shanghai Normal University, Shanghai 200234, China
|
| Abstract: |
| Downy mildew is the main disease in the production of spinach.The selection and evaluation of germplasm resources is the implantation and basis of the breeding of spinach against downy mildew.In this study,the spinachtraits from different germplasm resources,such as botanical characteristics,reproduction cycle and disease resistance,which have downy mildew resistance,were identifiedby field observation.The results showed that the diversity index of 10 qualitative traits of 59 spinach germplasm resources was distributed between 0.25 and 1.23,and the coefficient of variation of 8 quantitative traits was between 24.25% and 42.80%,with an average of 29.54%.The identification of the resistance to downy mildew show that the spinach materials S1 to S36 are high-resistant materials,S37-S41 are disease-resistant materials,and S42-S59 are medium-resistant materials.The results of the bolting period survey showed that 81.4% of the materials belonged to early or middle bolting materials,18.6% of the spinach materials belonged to the late bolting materials.In conclusion,the spinach material S1 has an erect plant type,oval leaves,late bolting and high resistance to downy mildew,and there was no downy mildew disease in the test period,and the downy mildew disease index and incidence rate were both 0. It was excellent germplasm resource for resisting to spinach downy mildew and for late bolting breeding. |
| Key words: spinach downy mildew germplasm resource bolting |
