Rice is an important staple food in China and it is at risk of attack by rice striped stem borer Chilo suppressalis, which occurs in most rice growing areas. In recent years, severe C. suppressalis outbreaks have been...Rice is an important staple food in China and it is at risk of attack by rice striped stem borer Chilo suppressalis, which occurs in most rice growing areas. In recent years, severe C. suppressalis outbreaks have been observed in China mainly due to changes in the rice cultivation systems, wide adoption of hybrid varieties and resistance to the dominant insecticides. Management relies primarily on chemical insecticides and resistance is an important contributing factor in these outbreaks. As a result, food safety of agricultural produce is reduced and the ecological and environmental integrities are threatened as well. Recently, environmentally friendly pest management measures, such as trap plants have been introduced for C. suppressalis management and this method can greatly reduce insecticide use. Our previous results indicated that the vetiver grass(Vetiveria zizanioides) is a dead-end trap plant that can effectively attract the adult females of C. suppressalis to lay eggs on it but where larvae are unable to complete their life cycle. This paper further explored the application of vetiver grass as a trap plant to manage C. suppressalis in the paddy fields. This environment-friendly tool can not only reduce C. suppressalis populations, it can also increase the diversity and abundance of natural enemies that can provide better environmental conditions for rice production.展开更多
【目的】开发厚朴新型分子标记,分析广东乐昌龙山林场厚朴资源的亲缘关系,以方便后续进行厚朴优株选择和优良品种选育等研究工作。【方法】以14个由广东乐昌龙山林场种植的、种源来自江西省各地的药用植物厚朴为材料,根据GenBank中厚朴c...【目的】开发厚朴新型分子标记,分析广东乐昌龙山林场厚朴资源的亲缘关系,以方便后续进行厚朴优株选择和优良品种选育等研究工作。【方法】以14个由广东乐昌龙山林场种植的、种源来自江西省各地的药用植物厚朴为材料,根据GenBank中厚朴cDNA序列信息,利用NCBI(https://www.ncbi.nlm.nih.gov)上Primer BLAST工具设计厚朴靶区域扩增多态性(Target Region Amplified Polymorphism,TRAP)标记固定引物,与SRAP(Sequence Related Amplified Polymorphism)随机引物配对,扩增厚朴基因组DNA,开发厚朴TRAP标记。统计TRAP标记与厚朴SSR(Simple Sequence Repeat)标记扩增产物的电泳带型图谱,用NTSYSpc2.10e软件进行聚类分析,分析14个厚朴资源的遗传多样性及其亲缘关系。【结果】从14条固定引物与5条随机引物配组形成的70对引物中共开发出7个扩增产物电泳条带清晰、带型丰富、多态性好的厚朴TRAP标记;构建了厚朴资源的亲缘关系树状图,结果表明龙山林场厚朴资源遗传相似系数在0.75~0.88之间,母株与对应子代之间遗传相似系数并不是最高。【结论】厚朴群体内基因交流频繁,遗传多样性丰富,新开发的TRAP标记将为厚朴优株鉴别、优良品种选育、分子标记辅助选择等后续研究工作提供便利。展开更多
基金supported by grants from the Zhejiang Key Research and Development Program of China(2015C02014)the National Natural Science Foundationof China(31672050)+1 种基金the National Key Research and Development Program of China(2016YFD0200800-04)the State Key Laboratory Breeding Base for Zhejiang Sustainable Pest Control,China(2010DS700124-ZZ1601)
文摘Rice is an important staple food in China and it is at risk of attack by rice striped stem borer Chilo suppressalis, which occurs in most rice growing areas. In recent years, severe C. suppressalis outbreaks have been observed in China mainly due to changes in the rice cultivation systems, wide adoption of hybrid varieties and resistance to the dominant insecticides. Management relies primarily on chemical insecticides and resistance is an important contributing factor in these outbreaks. As a result, food safety of agricultural produce is reduced and the ecological and environmental integrities are threatened as well. Recently, environmentally friendly pest management measures, such as trap plants have been introduced for C. suppressalis management and this method can greatly reduce insecticide use. Our previous results indicated that the vetiver grass(Vetiveria zizanioides) is a dead-end trap plant that can effectively attract the adult females of C. suppressalis to lay eggs on it but where larvae are unable to complete their life cycle. This paper further explored the application of vetiver grass as a trap plant to manage C. suppressalis in the paddy fields. This environment-friendly tool can not only reduce C. suppressalis populations, it can also increase the diversity and abundance of natural enemies that can provide better environmental conditions for rice production.
文摘【目的】开发厚朴新型分子标记,分析广东乐昌龙山林场厚朴资源的亲缘关系,以方便后续进行厚朴优株选择和优良品种选育等研究工作。【方法】以14个由广东乐昌龙山林场种植的、种源来自江西省各地的药用植物厚朴为材料,根据GenBank中厚朴cDNA序列信息,利用NCBI(https://www.ncbi.nlm.nih.gov)上Primer BLAST工具设计厚朴靶区域扩增多态性(Target Region Amplified Polymorphism,TRAP)标记固定引物,与SRAP(Sequence Related Amplified Polymorphism)随机引物配对,扩增厚朴基因组DNA,开发厚朴TRAP标记。统计TRAP标记与厚朴SSR(Simple Sequence Repeat)标记扩增产物的电泳带型图谱,用NTSYSpc2.10e软件进行聚类分析,分析14个厚朴资源的遗传多样性及其亲缘关系。【结果】从14条固定引物与5条随机引物配组形成的70对引物中共开发出7个扩增产物电泳条带清晰、带型丰富、多态性好的厚朴TRAP标记;构建了厚朴资源的亲缘关系树状图,结果表明龙山林场厚朴资源遗传相似系数在0.75~0.88之间,母株与对应子代之间遗传相似系数并不是最高。【结论】厚朴群体内基因交流频繁,遗传多样性丰富,新开发的TRAP标记将为厚朴优株鉴别、优良品种选育、分子标记辅助选择等后续研究工作提供便利。
