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首页> 外文学位 >Viability of butternut (Juglans cinerea L.) in the Northeastern United States: An assessment of the genetic diversity, health, and hybridization and recruitment of butternut in the Northeast.
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Viability of butternut (Juglans cinerea L.) in the Northeastern United States: An assessment of the genetic diversity, health, and hybridization and recruitment of butternut in the Northeast.

机译：美国东北地区胡桃（Juglans cinerea L.）的生存力：对东北胡桃的遗传多样性，健康以及杂交和募集的评估。

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摘要

Butternut (Juglans cinerea) trees are being extirpated from their natural range by means of an epidemic caused by a fungal pathogen. Widespread mortality is reminiscent of past epidemics on American chestnut (Castanea dentata) and American elm (Ulmus americana ). Understanding the course of contemporary decline of this tree species will provide greater insight on processes of potential extinction and the results of management to prevent it.;This thesis applies an interdisciplinary approach to characterize butternut of the northeastern Unites States. While there is evidence of weak genetic structuring, butternut appears to have maintained sufficient dispersal to prevent isolation and inbreeding depression. This observed genetic variation is an artifact of past community contiguity. Today, butternuts are recruiting insufficiently to prevent near-term population collapse. Integration of resistant hybrids should be a top priority. Information related in this thesis illuminates voids in our understanding of butternut and should be used to guide conservation policy.
机译：胡桃树（Juglans cinerea）由于真菌病原体引起的流行病而从自然环境中灭绝。广泛的死亡率让人联想到过去在美洲栗（Castanea dentata）和美洲榆（Ulmus americana）上的流行病。了解该树种的当代衰退过程，将为潜在灭绝的过程以及防止这种灭绝的管理方法提供更多的见识。；本论文采用跨学科方法来表征美国东北部的胡桃。尽管有证据表明其遗传结构较弱，但胡桃似乎保持了足够的分散性，以防止分离和近亲衰退。观察到的遗传变异是过去社区邻接的产物。如今，胡桃木的招募不足以防止近期人口崩溃。抗性杂种的整合应该是重中之重。本文所涉及的信息阐明了我们对胡桃的认识上的空白，应被用来指导保护政策。

著录项

  • 作者

    Boraks, Andre A. W.;

  • 作者单位

    University of New Hampshire.;

  • 授予单位 University of New Hampshire.;
  • 学科 Biology Botany.;Biology Genetics.;Biology Conservation.
  • 学位 M.Sc.
  • 年度 2013
  • 页码 93 p.
  • 总页数 93
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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