• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Proceedings of the Royal Society B: Biological Sciences >A snail with unbiased population sex ratios but highly biased brood sex ratios.
【2h】

A snail with unbiased population sex ratios but highly biased brood sex ratios.

机译：一种蜗牛种群性别比无偏但育雏性别比偏高。

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Extraordinary sex ratio patterns and the underlying sex-determining mechanisms in various organisms are worth investigating, particularly because they shed light on adaptive sex-ratio adjustment. Here, we report an extremely large variation in the brood sex ratio in the freshwater snail, Pomacea canaliculata. In eight rearing series originating from three wild populations, sex ratios were highly variable among broods, ranging continuously from almost exclusively males to almost exclusively females. However, sex ratios were similar between broods from the same mating pair, indicating that sex ratio is a family trait. Irrespective of the large variations, the average sex ratios in all rearing series were not significantly different from 0.5. We argue that Fisher's adaptive sex-ratio theory can explain the equal average sex ratios, and the results, in turn, directly support Fisher's theory. Polyfactorial sex determination (in which sex is determined by three or more genetic factors) is suggested as the most likely mechanism producing the variable brood sex ratio.
机译：各种生物中非同寻常的性别比模式和潜在的性别决定机制值得研究，特别是因为它们为适应性性别比调整提供了启示。在这里，我们报告了淡水蜗牛Pomacea canaliculata的育雏性别比的极大变化。在来自三个野生种群的八个养育系列中，不同性别之间的性别比例差异很大，从几乎完全是雄性到几乎完全是雌性。然而，同一对交配的母鸡之间的性别比是相似的，这表明性别比是一种家庭特征。不论差异有多大，所有饲养系列的平均性别比都没有显着不同于0.5。我们认为，费舍尔的自适应性别比率理论可以解释均等的性别比率，其结果反过来直接支持费舍尔的理论。建议多因素性别确定（其中性别由三个或更多遗传因素决定）是产生可变育雏性别比的最可能机制。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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