Gametic conflict versus contact in the evolution of anisogamy
Gametic conflict versus contact in the evolution of anisogamy
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DOI：
10.1016/j.tpb.2008.02.002
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发表时间：
2008-06-01
影响因子：
1.4
通讯作者：
Roughgarden, Joan
中科院分区：
文献类型：
--
作者：
Iyer, Priya;Roughgarden, Joan
异配生殖指的是配子大小不同，并且表现出雄性和雌性之间的差异。异配生殖的进化被广泛解释为涉及配子生产者之间的冲突，小精子寄生在卵子的投资上。使用人口遗传模型的进化在一个基因座，共同编码的精子和卵子大小的雌雄同体，我们表明，异配生殖的起源在外部产卵的人口不需要涉及配子生产者之间的冲突。配子大小的二态性可能是一种适应，增加配子相遇率时，选择大合子，我们表明这在一个机械一般的个人选择模型。我们使用的万斯生存函数没有特定的异速生长的假设模型的合子健身依赖于其大小，从而获得生态和生活史相关的同花受精和异花受精，我们成功地比较从团藻目的数据。(C)2008年爱思唯尔公司所有的战斗保留。
Anisogamy refers to gametes that differ in size, and characterizes the difference between males and females. The evolution of aniosgamy is widely interpreted as involving conflict between gamete producers with small sperm parasitizing on the investment made by the eggs. Using a population genetic model for evolution at a locus that codes jointly for sperm and egg sizes of a hermaphrodite, we show that the origin of anisogamy in an externally spawning population need not involve conflict between gamete producers. Gamete size dimorphism may be an adaptation that increases gamete encounter rates when large zygotes are selected, and we show this in a mechanistically general individual selection model. We use the Vance survival function without specific allometric assumptions to model the zygote fitness dependence on its size, and hence obtain ecological and life-history correlates of isogamy and anisogamy, which we successfully compare with data from Volvocales. (C) 2008 Elsevier Inc. All fights reserved.