...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Evolution: International Journal of Organic Evolution >Linking macrotrends and microrates: Re-evaluating microevolutionary support for Cope's rule
【24h】

Linking macrotrends and microrates: Re-evaluating microevolutionary support for Cope's rule

机译：关联宏观趋势和微利率：重新评估对Cope规则的微观进化支持

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Cope's rule, wherein a lineage increases in body size through time, was originally motivated by macroevolutionary patterns observed in the fossil record. More recently, some authors have argued that evidence exists for generally positive selection on individual body size in contemporary populations, providing a microevolutionary mechanism for Cope's rule. If larger body size confers individual fitness advantages as the selection estimates suggest, thereby explaining Cope's rule, then body size should increase over microevolutionary time scales. We test this corollary by assembling a large database of studies reporting changes in phenotypic body size through time in contemporary populations, as well as studies reporting average breeding values for body size through time. Trends in body size were quite variable with an absence of any general trend, and many populations trended toward smaller body sizes. Although selection estimates can be interpreted to support Cope's rule, our results suggest that actual rates of phenotypic change for body size cannot. We discuss potential reasons for this discrepancy and its implications for the understanding of Cope's rule.
机译：Cope的规则最初是由化石记录中观察到的宏观进化模式所激发，其中沿袭的族系随着时间的推移而增加。最近，一些作者认为，有证据表明当代人口普遍对个体的体型进行正面选择，从而为Cope统治提供了微观进化机制。如果较大的体形如选择估计所建议的那样赋予个人健身优势，从而解释了Cope的规则，则体形应在微进化时间尺度上增加。我们通过组装一个大型数据库来研究这一推论，这些数据库报告当代人群表型体型随时间的变化，以及报告体型随时间的平均繁殖值的研究。在没有任何总体趋势的情况下，身体大小的趋势变化很大，并且许多人群趋向于身体较小。尽管可以将选择估计值解释为支持Cope的规则，但我们的结果表明，体型的实际表型变化速率不能。我们讨论了造成这种差异的潜在原因及其对理解Cope规则的影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号