大麦黄矮病毒-PAV株系侵染小麦对玉米蚜适合度的影响
Effect of barley yellow dwarf virus-PAV strain-infected wheat plants on the fitness of corn leaf aphids
罗坤 1胡佳振 2尚焕章 2何德佳 2郭娇2
作者信息
- 1. 延安大学 生命科学学院;陕西省区域生物资源保育与利用工程技术研究中心,陕西 延安 716000
- 2. 延安大学 生命科学学院
- 折叠
摘要
大麦黄矮病毒(barley yellow dwarf virus,BYDV)-PAV株系是引起我国小麦黄矮病流行的重要病原,玉米蚜(Rhopalosiphum maidis Fitch)是陕北农田蚜害的优势种之一,在玉米与小麦轮作的条件下,黄矮病原极有可能对玉米蚜的适合度产生直接或间接影响.基于此,本研究通过构建玉米蚜的生命表,利用两性生命表软件分析种群动态参数的变化,以评估BYDV-PAV株系侵染小麦对玉米蚜适合度的影响.结果表明:与健康植株相比较,小麦品种XN979感染BYDV-PAV病毒之后,显著提高了玉米蚜的净增殖率、内禀增长率、周限增长率参数,并有效提高了其存活率与生命周期;未携带病毒的禾谷缢管蚜取食之后,却显著降低了玉米蚜的种群动态参数,并且其存活率曲线呈现急剧下降的趋势.因此,BYDV-PAV病毒侵染小麦可对玉米蚜的适合度产生积极影响.研究为完整解析不同作物轮作过程中植物病毒BYDV-PAV株系介导的蚜虫与小麦的互作规律提供了重要线索,也可为陕北农田蚜害以及黄矮病的防控提供实验数据支撑.
Abstract
The barley yellow dwarf virus(BYDV)-PAV strain is a major virus causing the epidemic of wheat yellow dwarf disease in China,and the corn leaf aphid(Rhopalosiphum maidis Fitch)is one of the dominant aphid species in farmland in northern Shaanxi Province.During its host transformation,the yellow dwarf pathogen is highly likely to have direct or indirect impact on its fitness,however,the effects of BYDV on the fitness of the non-host insects is underdetermined.Therefore,this study focused on building a life table of corn leaf aphids and evaluated the ef-fects of BYDV-PAV strain infection on the fitness of corn leaf aphids through changes in population dynamics parameters using the TWOSEX-MSChart software.The results showed that compared with healthy plants,wheat variety XN979 infected with BYDV-PAV significantly increased the intrinsic natural increase rate(r),net reproductive rate(R0),and finite increase rate(λ),and significantly improved its survival rate and life span.After feeding on the grain aphid without carrying the virus,the population dynamics parameters of the Rhopalosiphum maidis were significantly reduced,and its survival rate curve showed a sharp downward trend.Therefore,infection of wheat with BYDV-PAV virus can have a positive impact on the fitness of Rhopalosiphum maidis.The present study provides important clues for the complete analysis of the interaction between aphids and wheat mediated by plant virus BYDV-PAV strains during different crop rotations,and it also provides experimental data for the prevention and control of aphid infestation and yellow dwarf disease in farmlands in northern Shaanxi Province.
关键词
大麦黄矮病毒-PAV/玉米蚜/禾谷缢管蚜/生命表/互作关系/适合度Key words
BYDV-PAV/Rhopalosiphum maidis/Rhopalosiphum padi/life table/interaction relationship/fitness引用本文复制引用
基金项目
国家自然科学基金(32260717)
国家级大学生创新创业训练计划(S202110719043)
延安大学博士科研启动基金(YDBK2019-65)
出版年
2024
NETL
NSTL
万方数据