Male sand crickets trade‐off flight capability for reproductive potential
Male sand crickets trade‐off flight capability for reproductive potential
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雄性沙蟋蟀在飞行能力和繁殖潜力之间进行权衡
DOI：
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发表时间：
2008
影响因子：
2.1
通讯作者：
D. Fairbairn
中科院分区：
文献类型：
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作者：
İ. Sağlam;D. Roff;D. Fairbairn
在本文中，我们测试的假设，雄性沙蟋蟀，坚强的蟋蟀，飞行能力和生殖潜力之间的权衡表示为减少睾丸重量的飞行能力变体。我们采用半同胞设计，130头公马，每头公马3只母马，每个母马家族平均5.66只公马，共2206只F1后代。测量的性状包括头宽、体干重、精巢重量、翅型（小翅/大翅）、背纵飞行肌（DLM）重量和这些肌肉的功能状态。各性状的遗传力均达显著水平，遗传力在0.14 ~ 0.43之间。所有性状均与体型呈正相关，但去除此协方差后，发现睾丸大小与飞行能力（通过翼形态、DLM大小或DLM状态测量）之间存在非常显著的表型和遗传权衡。这对特定形态的生殖策略可能产生的影响进行了讨论。
In this paper, we test the hypothesis that male sand crickets, Gryllus firmus, experience a trade‐off between flight capability and reproductive potential expressed as reduced testis weight in flight‐capable morphs. We used a half‐sib design with 130 sires, three dams per sire and an average of 5.66 males per dam family, for a total of 2206 F1 offspring. Traits measured were head width, somatic dry weight, testis weight, wing morph (micropterous/macropterous), weight of the dorso‐longitudinal flight muscles (DLM) and the functional status of these muscles. Heritabilities of all traits were significant and ranged from 0.14 to 0.43. All traits were positively correlated with body size, but removal of this covariance revealed a highly significant trade‐off, both phenotypically and genetically, between testes size and flight capability as measured by wing morph, DLM size or DLM status. The possible implications of this for morph‐specific reproductive tactics are discussed.