Lack of phenotypic variation despite population structure in larval utilization of pea aphids by populations of the lady beetle Hippodamia convergens
Lack of phenotypic variation despite population structure in larval utilization of pea aphids by populations of the lady beetle Hippodamia convergens
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DOI：
10.1016/j.biocontrol.2020.104507
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发表时间：
2021-04-01
影响因子：
4.2
通讯作者：
Sethuraman, Arun
中科院分区：
文献类型：
--
作者：
Grenier, Christy;Summerhays, Bryce;Sethuraman, Arun
收敛瓢虫（Hippodamia convergens）是一种多面手天敌，在美国各地广泛用于增强生物控制。最近的研究指出，在西部（加州）与东部（堪萨斯）种群的物种的遗传和表型差异。在这里，我们调查（1）遗传种群结构，（2）在利用豌豆蚜虫的温度类似于美国西部的表型差异（a）东部与西部人口，（B）F1东部X西部杂交与他们的祖先群体，并调查（c）东部和西部人口之间的竞争的影响。我们发现，尽管遗传种群结构，最终蛹重，或通过幼虫发育从第三龄蛹阶段的净增重比没有差异。我们的研究指出了东方和西方的H。收敛，和缺乏杂种优势和杂合子杂种优势。
The convergent lady beetle (Hippodamia convergens) is a generalist natural enemy that is utilized extensively in augmentative biological control across the United States. Recent studies have pointed to both genetic and phenotypic differences in Western (California) versus Eastern (Kansas) populations of the species. Here we investigate (1) genetic population structure, and (2) phenotypic differences in the utilization of pea aphids at temperatures that resemble the Western United States in (a) Eastern versus Western populations, (b) F1 Eastern X Western hybrids versus their progenitor populations, and investigate the effects of competition between (c) Eastern and Western populations. We found no differences in final pupal weight, or the net weight gain ratio through larval development from the third instar to pupal stage, despite genetic population structure. Our study points towards plastic response and effectiveness in feeding phenotypes of Eastern and Western populations of H. convergens, and the absence of hybrid vigor and heterozygote advantages in hybrids.