• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nature >Allele substitution at a flower colour locus produces a pollinator shift in monkeyflowers
【24h】

Allele substitution at a flower colour locus produces a pollinator shift in monkeyflowers

机译：花色基因座上的等位基因替代在猴花中产生授粉媒介转移

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

The role of major mutations in adaptive evolution has been debated for more than a century. The classical view is that adaptive mutations are nearly infinite in number with infinite-simally small phenotypic effect, but recent theory suggests otherwise. To provide empirical estimates of the magnitude of adaptive mutations in wild plants, we conducted field studies to determine the adaptive value of alternative alleles at a single locus, YELLOW UPPER (YUP). YUP controls the presence or absence of yellow carotenoid pigments in the petals of pink-flowered Mimulus lewisii, which is pollinated by bumblebees, and its red-flowered sister species M. cardinalis, which is pollinated by hummingbirds. We bred near-isogenic lines (NILs) in which the YUP allele from each species was substituted into the other. M. cardinalis NILs with the M. lewisii YUP allele had dark pink flowers and received 74-fold more bee visits than the wild type, whereas M. lewisii NILs with the M. cardinalis yup allele had yellow-orange flowers and received 68-fold more hummingbird visits than the wild type. These results indicate that an adaptive shift in pollinator preference may be initiated by a single major mutation.
机译：重大突变在适应性进化中的作用已经争论了一个多世纪。经典观点是，适应性突变的数量几乎无限，具有无限小的表型效应，但最近的理论却相反。为了提供对野生植物中适应性突变幅度的经验估计，我们进行了田野研究，以确定单个等位基因YELLOW UPPER（YUP）的替代等位基因的适应性值。 YUP控制着粉红色的Mimulus lewisii的花瓣中是否存在黄色类胡萝卜素色素，粉红色的大黄蜂对其进行了授粉，而其红色花朵的姐妹种M. cardinalis则被蜂鸟进行了授粉。我们繁殖了近等基因系（NILs），其中来自每个物种的YUP等位基因被替换为另一个。带有路易斯M. leupsii YUP等位基因的红腹膜念珠菌NILs有深粉红色的花朵，比野生型多见74倍的蜜蜂来访，而带有路易斯M. cardinalis yup等位基因的M. lewisii NILs有橙黄色的花，收到了68倍蜂鸟的探访次数比野生型更多。这些结果表明，传粉媒介偏好的适应性转变可能是由单个主要突变引发的。

著录项

  • 来源
    《Nature》 |2003年第6963期|p.176-178|共3页
  • 作者

    H. D. Bradshaw Jr.; Douglas W. Schemske;

  • 作者单位

    Department of Biology, University of Washington, Seattle, Washington 98195, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
  • 关键词

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