Wall-making behavior as a proximate mechanism to generate variation in larval competition in Callosobruchus maculatus (Coleoptera: Bruchidae)
Wall-making behavior as a proximate mechanism to generate variation in larval competition in Callosobruchus maculatus (Coleoptera: Bruchidae)
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DOI：
10.1007/s10682-007-9167-7
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发表时间：
2008-03-01
影响因子：
1.9
通讯作者：
Toquenaga, Yukihiko
中科院分区：
文献类型：
--
作者：
Mano, Hiroyuki;Toquenaga, Yukihiko
从比赛争夺幼虫竞争类型的变化，观察来自一个地理株的Callosobruchus maculatus的实验室线。在竞争竞争中，由于成功的幼虫垄断资源，一粒小豆只能羽化出一条成虫。然而，在争夺竞争中，多个成年人可以从豆中出现，因为幼虫共享资源。为了解释竞争类型的变化，我们使用了六个地理株系来检验这一假设，即幼虫竞争类型是由建筑物墙壁的幼虫行为决定的，这可以防止幼虫相互干扰，允许多个成虫从一个豆中出现。我们还调查了比例的壁制作的mistest-scramble杂交线，以测试是否形成一个壁结构是遗传决定的。结果支持我们的假设，造墙行为决定了一个地理株内的幼虫竞争的类型，并且该行为是由遗传决定的。当同一品系的两个幼虫侵染一个菜豆时，争夺型品系表现出比争夺型品系更高的造壁频率。幼虫的竞争类型和趋势，对壁的形成，在mistst-scramble杂种线范围中间的父母线。我们的结论是，幼虫竞争类型的变化是由来自地理株系的实验室品系之间的幼虫造壁行为的变化决定的。我们将讨论C.根据我们的研究结果
Variation from contest to scramble in larval competition types was observed among laboratory lines derived from a geographic strain of Callosobruchus maculatus. In contest competition, only one adult can emerge from a small bean because the successful larva monopolizes resources. In scramble competition, however, multiple adults can emerge from the bean because larvae share resources. To explain the variation in competition types, we used six lines of the geographic strain to test the hypothesis that the larval competition type is determined by the larval behavior of building walls, which prevent larvae from interfering with each other, allowing multiple adults to emerge from a single bean. We also investigated the proportions of wall-making in contest-scramble hybrid lines to test whether the formation of a wall structure was genetically determined. Results support our hypothesis that wall-making behavior determines the type of larval competition within a geographic strain, and that the behavior is genetically determined. Scramble-type lines exhibited higher frequencies of wall-making than contest-type lines when two larvae of the same line infested a bean. Larval competition type and the tendency towards wall formation in contest-scramble hybrid lines ranged intermediate of parental lines. We concluded that the variation in larval competition type is determined by the variation in larval wall-making behavior among laboratory lines derived from the geographic strain. We will discuss the evolution of scramble-type larvae in C. maculatus based on our results.