nature

当前位置: Nature » 基因&基因组学 » 正文

Nature子刊:西南大学学者描绘斜纹夜蛾精细基因图谱

摘要 : 2017年9月28日,国际学术权威刊物自然出版集团旗下子刊《Nature Ecology & Evolution》杂志在线发表了西南大学家蚕基因组生物学国家重点实验室Kazuei Mita研究员等单位合作的一篇研究论文,研究成果揭示了斜纹夜蛾的高质量基因组精细图谱

2017年9月28日,国际学术权威刊物自然出版集团旗下子刊《Nature Ecology & Evolution》杂志在线发表了西南大学家蚕基因组生物学国家重点实验室Kazuei Mita研究员等单位合作的一篇研究论文,研究成果揭示了斜纹夜蛾的高质量基因组精细图谱,以及群体变异图谱和基因表达图谱,可为其防治提供科学依据。

论文第一作者程廷才副教授介绍斜纹夜蛾又称东方夜蛾,是一种多食性和暴食性的农业害虫,危害近100科的300余种植物,主要分布于亚洲和大洋洲的热带和亚热带地区。近年来,斜纹夜蛾在我国长江流域和沿海地区暴发频率明显增加,给农业尤其是蔬菜生产造成严重损失。

研究人员首先构建了一个20多个世代的斜纹夜蛾自交品系,采用单个体基因组样本和全基因组鸟枪法方法,对斜纹夜蛾基因组进行测序和组装,获得了包括31条染色体和4亿多个碱基在内的斜纹夜蛾全基因组精细图谱。

原文链接:

Genomic adaptation to polyphagy and insecticides in a major East Asian noctuid pest

原文摘要:

The tobacco cutworm, Spodoptera litura, is among the most widespread and destructive agricultural pests, feeding on over 100 crops throughout tropical and subtropical Asia. By genome sequencing, physical mapping and transcriptome analysis, we found that the gene families encoding receptors for bitter or toxic substances and detoxification enzymes, such as cytochrome P450, carboxylesterase and glutathione-S-transferase, were massively expanded in this polyphagous species, enabling its extraordinary ability to detect and detoxify many plant secondary compounds. Larval exposure to insecticidal toxins induced expression of detoxification genes, and knockdown of representative genes using short interfering RNA (siRNA) reduced larval survival, consistent with their contribution to the insect’s natural pesticide tolerance. A population genetics study indicated that this species expanded throughout southeast Asia by migrating along a South India–South China–Japan axis, adapting to wide-ranging ecological conditions with diverse host plants and insecticides, surviving and adapting with the aid of its expanded detoxification systems. The findings of this study will enable the development of new pest management strategies for the control of major agricultural pests such as S. litura.

来源: Nature Ecology & Evolution 浏览次数:0

热门文章TOP

RSS订阅 - 填写您的邮件地址,订阅我们的精彩内容: - 网站地图
网站联系电话:020-87540820 备案号:粤ICP备11050685号-8 增值电信业务经营许可证:粤B2-20120479
©2011-2015 生物帮 All rights reserved.