• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Entomology >Colonization of Marginal Host Plants by Seed Beetles (Coleoptera: Chrysomelidae): Effects of Geographic Source and Genetic Admixture
【24h】

Colonization of Marginal Host Plants by Seed Beetles (Coleoptera: Chrysomelidae): Effects of Geographic Source and Genetic Admixture

机译：种子甲虫的边缘宿主植物的定植（鞘翅目：Chrysomelidae）：地理来源和遗传混合物的影响

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 ability to adapt to a novel host plant may vary among insect populations with different genetic histories, and colonization of a marginal host may be facilitated by genetic admixture of disparate populations. We assembled populations of the seed beetle, Callosobruchus maculatus (F.), from four continents, and compared their ability to infest two hosts, lentil and pea. We also formed two cross-continent hybrids (Africa x N.A. and Africa x S.A.). In pre-selection assays, survival was only similar to 3% in lentil and similar to 40% in pea. For three replicate populations per line, colonization success on lentil was measured as cumulative exit holes after 75-175 d. On pea, we estimated the change in larval survival after five generations of selection. Females in all lines laid few eggs on lentil, and survival of F-1 larvae was uniformly <5%. Subsequently, however, the lines diverged considerably in population growth. Performance on lentil was highest in the Africa x N.A. hybrid, which produced far more adults (mean > 11,000) than either parental line. At the other extreme, Asian populations on lentil appeared to have gone extinct. The Africa x N.A. line also exhibited the highest survival on pea, and again performed better than either parent line. However, no line displayed a rapid increase in survival on pea, as is sometimes observed on lentil. Our results demonstrate that geographic populations can vary substantially in their responses to the same novel resource. In addition, genetic admixtures (potentially caused by long-distance transport of infested seeds) may facilitate colonization of an initially poor host.
机译：适应新型宿主植物的能力可能在具有不同遗传史的昆虫群体中变化，并且可以通过不同种群的遗传混合物促进边际宿主的定植。我们组装了来自四大洲的种子甲虫种子甲虫的种群，并比较了他们对两家宿主，扁豆和豌豆感染的能力。我们还形成了两个跨大陆杂交种（非洲x N.A.和Africa x S.A.）。在预选择的测定中，存活率在扁豆的3％类似，豌豆中的40％。对于每条线的三个重复群体，在75-175天之后，测量扁豆上的殖民化成功作为累积出口孔。在豌豆上，我们估计五代选择后幼虫生存的变化。所有线路的女性在扁豆上奠定了几个鸡蛋，F-1幼虫的存活率均匀<5％。然而，随后，在人口增长中，线条分散。扁豆的性能在非洲X N.A. Hybrid中最高，其成年人（平均> 11,000）比父母线更多。另一方面，扁豆的亚洲人口似乎已经灭绝了。非洲X N.A.系列还表现出豌豆的最高生存，并且再次比父母线更好地表现。然而，如在扁豆上有时观察到的豌豆生存率没有效果快速增加。我们的结果表明，地理人口可能会在对同一新资源的回应中显着变化。此外，遗传混合物（潜在地由侵染种子的长途传输引起的）可以促进最初较差的宿主的定植。

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