Does sex trade with violence among genotypes in Drosophila melanogaster?
Does sex trade with violence among genotypes in Drosophila melanogaster?
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DOI：
10.1371/journal.pone.0001986
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发表时间：
2008-04-16
期刊：
影响因子：
3.7
通讯作者：
Nuzhdin SV
中科院分区：
文献类型：
--
作者：
Cabral LG;Foley BR;Nuzhdin SV
形成赢得竞争互动能力的进化力量，例如攻击性的交锋，仍然鲜为人知。考虑到竞技成功的体能优势，攻击性和性表现特征的差异应该被耗尽，但这些特征中的大量差异是始终如一的。虽然生活史权衡通常被认为是维持变异的一种机制，但同种物种竞争策略的可变性可能意味着不存在单一的最佳策略。我们在一组不同的自交系中测量了攻击性相互作用的遗传决定结果，以及由此产生的对交配成功的影响，这些自交系既代表自然变异，也代表人工选择的基因类型。尽管一种基因的雄性在与其他基因的地域接触中总是失之交臂，但它仍然成功地击败了人为选择的具有超常攻击性的雄性，并控制了所有其他品系。如果偏爱领地雄性，领地成功的非传递性模式可能会保持攻击性策略的多样性。然而，地域上的成功并不总是与雄性交配成功相关，在一些雄性基因型中，雌性更喜欢‘赢家’，而在其他雄性基因型中，雌性更喜欢‘失败者’。这表明，从种群方法的角度研究行为可能提供有限的进化和遗传洞察。雄性之间竞争成功的总体模式和两性之间的交配交易与所提出的由于竞争相互作用的非线性结果而保持遗传变异的机制是一致的。
The evolutionary forces shaping the ability to win competitive interactions, such as aggressive encounters, are still poorly understood. Given a fitness advantage for competitive success, variance in aggressive and sexual display traits should be depleted, but a great deal of variation in these traits is consistently found. While life history tradeoffs have been commonly cited as a mechanism for the maintenance of variation, the variability of competing strategies of conspecifics may mean there is no single optimum strategy. We measured the genetically determined outcomes of aggressive interactions, and the resulting effects on mating success, in a panel of diverse inbred lines representing both natural variation and artificially selected genotypes. Males of one genotype which consistently lost territorial encounters with other genotypes were nonetheless successful against males that were artificially selected for supernormal aggression and dominated all other lines. Intransitive patterns of territorial success could maintain variation in aggressive strategies if there is a preference for territorial males. Territorial success was not always associated with male mating success however and females preferred ‘winners’ among some male genotypes, and ‘losers’ among other male genotypes. This suggests that studying behaviour from the perspective of population means may provide limited evolutionary and genetic insight. Overall patterns of competitive success among males and mating transactions between the sexes are consistent with mechanisms proposed for the maintenance of genetic variation due to nonlinear outcomes of competitive interactions.
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影响因子：
2.5
作者：
HOFFMANN, AA
通讯作者：
HOFFMANN, AA
DOI：
10.1098/rspb.1997.0099
发表时间：
1997-05-22
影响因子：
4.7
作者：
Matthews, IM;Evans, JP;Magurran, AE
通讯作者：
Magurran, AE
影响因子：
2.5
作者：
Stamps, J;Buechner, M;Zuniga, N
通讯作者：
Zuniga, N
影响因子：
2.5
作者：
HOFFMANN, AA;CACOYIANNI, Z
通讯作者：
CACOYIANNI, Z
影响因子：
2.5
作者：
HOFFMANN, AA
通讯作者：
HOFFMANN, AA