| 板栗自然居群疫病发生研究 |
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| 引用本文： | 刘德兵,魏军亚,秦岭,李绍鹏.板栗自然居群疫病发生研究[J].西北林学院学报,2002,17(4):52-53,61. |
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| 作者姓名： | 刘德兵 魏军亚 秦岭 李绍鹏 |
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| 作者单位： | 华南热带农业大学,园艺学院,海南,儋州,571737; 中山大学,生命科学学院,广东,广州,510275; 北京农学院,园艺系,北京,102206 |
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| 基金项目： | 北京科技新星计划资助项目(951872200) |
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| 摘 要： | 通过田间实地调查,进一步确认我国栗疫病的发病率由北向南逐渐减轻,栗疫病的各级发病症状在各被调查地均有不同程度的发生.结合调查进行取样,采用超薄平板聚丙烯酰胺等电聚焦技术对发病群体与无病群体进行遗传多样性分析,发现除等位基因平均数(A)二群体相等外,无病群体的多态位点比率(P)、平均观察杂合度(Ho )、平均期望基因杂合度(He)均高于有病群体,固定指数(F)前者大于后者且均为负值(分别为:-0.216和-0.241).
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| 关 键 词： | 板栗 居群 栗疫病 |
| 文章编号： | 1001-7461(2002)04-0052-02 |
Occurrence of Natural Chestnut Population of Cryphonectria Paristtics |
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| LIU De bing ,WEI Jun ya ,QIN Ling ,LI Shao peng.Occurrence of Natural Chestnut Population of Cryphonectria Paristtics[J].Journal of Northwest Forestry University,2002,17(4):52-53,61. |
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| Authors: | LIU De bing WEI Jun ya QIN Ling LI Shao peng |
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| Institution: | LIU De bing 1,WEI Jun ya 2,QIN Ling 3,LI Shao peng 1 |
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| Abstract: | It was found that incidence of Cryphonectria paristtics in China decreased gradually from north to south by field survey.All level symptoms of Cryphonectria paristtics had different degree occurrence in different areas of chestnut. Genetic variability of 2 national chestnut populations of diseasedness and non diseasedness were investigated using isoelectric focusing in thin layer polyarcylamide slab gels.The result showed that the allete mean( A ) of two populations were equal. The percentage of loci polymorphic( P ), direct count mean heterozygosity( Ho ), expected mean heterozygosity( He ) of the former were all higher than the latter. The degree of genetic differentiation( F ) of diseasedness population of the former was higher and both of them were negative(ie:-0.216,-0.241) |
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| Keywords: | chestnut population Cryphonectria paristtics |
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