GUO Weili,GUO Yanyan,LI Xinzheng.Relationship Between Morphological Index and Resistance to Powdery Mildew in Pumpkin[J].Northern Horticulture,2016,40(24):104-108.[doi:10.11937/bfyy.201624026]
中国南瓜苗期性状与白粉病抗性的关系
- Title:
- Relationship Between Morphological Index and Resistance to Powdery Mildew in Pumpkin
- Keywords:
- Cucurbita moschata Duch.; morphological indexes; powdery mildew; chlorophyll content; stomatal density
- 文献标志码:
- A
- 摘要:
- 以中国南瓜材料自交系‘112-2’和“九江轿顶”为试材，通过测定2~4片真叶1心期的形态指标（叶长、叶宽、叶面积、茎长、茎粗）、叶绿素含量、气孔密度和病情指数，研究了南瓜不同的苗期性状与白粉病抗性的关系。结果表明：在2~3片真叶1心期，中国南瓜自交系‘112-2’叶面积、叶长、叶宽和病情指数分别略低于“九江轿顶”，而茎粗、茎长和气孔密度略高于“九江轿顶”，均无显著差异，叶绿素含量显著高于“九江轿顶”；植株长至4叶1心期，2种南瓜材料各形态指标（除茎粗外）、叶绿素含量、气孔密度和病情指数均存在显著差异；2~4叶1心期，自交系‘112-2’和“九江轿顶”材料分别与病情指数、气孔密度呈负相关，与叶绿素含量存在显著正相关；病情指数分别与叶绿素含量、气孔密度呈负相关。表明中国南瓜自交系‘112-2’的抗白粉病能力强于“九江轿顶”，与叶绿素含量、气孔密度存在正相关。
- Abstract:
- Pumpkin varieties inbred line ‘112-2’ and ‘Jiujiangjiaoding’ were used as materials.At 2-4 true leaf-fully expanded periods，morphological indexes (leaf length，leaf width，leaf area，stem length test，stem width)，chlorophyll content，stomatal density and disease index were determined，and relationship of different pumpkin indexes and powdery mildew resistance was discussed.The results showed that at the 2-3 true leaf-fully expanded periods，some morphological indexes (leaf area，leaf length，leaf width) and disease index of inbred line ‘112-2’ were slightly lower than those of ‘Jiujiangjiaoding’，other morphological indexes (stem width and stem length) and stomatal density were higher than ‘Jiujiangjiaoding’，and no significant difference was found.Chlorophyll content of inbred line ‘112-2’ was significantly higher than ‘Jiujiangjiaoding’.While，there were significant difference in the morphological indexes (except for stem width)，chlorophyll content，stomatal density and disease index of two kinds of pumpkin materials at 4 true leaf-fully expanded period.At the 2-4 true leaf-fully expanded periods，pumpkin materials (inbred line ‘112-2’ and ‘Jiujiangjiaoding’) respectively existed a negative correlation with disease index and stomatal density，a significantly positive correlation with chlorophyll content；disease index showed a negative correlation with chlorophyll content or stomatal density.Therefore，the powdery mildew resistance of the inbred line ‘112-2’ was stronger than that of ‘Jiujiangjiaoding’，which might be positively correlated with the chlorophyll content and stomatal density.
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备注/Memo
第一作者简介：郭卫丽（1985-），女，河南商丘人，博士，讲师，硕士生导师，现主要从事蔬菜栽培与生物技术等研究工作。E-mail:guoweili1226@sina.com.责任作者：李新峥（1965-），男，河南辉县人，硕士，教授，硕士生导师，现主要从事南瓜种质资源创新利用等研究工作。E-mail:lxz2283@126.com.基金项目：国家自然科学基金项目青年基金资助项目（31401876）；河南省自然科学基金资助项目（132300410357）；河南省科技攻关重点资助项目（162102110076）；2014年博士科研启动费资助项目（207010615003）。