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首页> 外文学位 >The population genetics of loblolly pine (Pinus taeda L.) and shortleaf pine (Pinus echinata mill.) hybridization and introgression.
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The population genetics of loblolly pine (Pinus taeda L.) and shortleaf pine (Pinus echinata mill.) hybridization and introgression.

机译：火炬松（Pinus taeda L.）和短叶松（Pinus echinata mill。）杂交和渗入的群体遗传学。

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摘要

Scope and Method of Study. Molecular markers, population genetics, ecological genetics, hybridization, introgression, conservation.;Findings and Conclusions. Results derived from loblolly pine and shortleaf pine cultivated from seeds collected from throughout their ranges in the 1950s shows that these two species have been forming natural hybrids for some time, and microsatellite results show how much introgression could be found in stands of these two species. However, these results are in some conflict with amplified fragment length polymorphism data acquired from the same data set. Both species have low phiPT, which is expected from wind-pollinated forest trees. Results from loblolly pine and shortleaf pine collected from naturally regenerating stands of today indicate that the rate of hybridization has increased in the last 50 years and that phi PT is increasing in both species. These results indicate that one or both of these species are at risk of extinction by introgression. However, there has been no significant change in the degree of introgression in the shortleaf pine stands of the Caney Creek Wilderness Area, and phiPT is normal for the populations found there, despite these stands living so close to cultivated loblolly pine plantations.
机译：研究范围和方法。分子标记，种群遗传学，生态遗传学，杂交，基因渗入，保存。；发现与结论。从1950年代从其整个范围收集的种子中种植的火炬松和短叶松获得的结果表明，这两个物种已经形成了自然杂种已有一段时间，而微卫星结果表明，在这两个物种的林分中可以发现多少渗入。但是，这些结果与从同一数据集获取的扩增片段长度多态性数据有些冲突。两种物种的phiPT均较低，这是风媒林木所期望的。从今天的自然更新林分中收集的火炬松和短叶松的结果表明，在过去的50年中，杂交速率增加了，两种物种的phi PT都增加了。这些结果表明，这些物种中的一个或两个都有因渗入而灭绝的风险。但是，Caney Creek荒野地区的短叶松林的渗入程度没有明显变化，并且phiPT对于在那里发现的种群来说是正常的，尽管这些林地与人工种植的松树人工林非常近。

著录项

  • 作者

    Stewart, John F.;

  • 作者单位

    Oklahoma State University.;

  • 授予单位 Oklahoma State University.;
  • 学科 Biology Ecology.;Agriculture Plant Culture.;Agriculture Forestry and Wildlife.;Biology Conservation.
  • 学位 Ph.D.
  • 年度 2010
  • 页码 78 p.
  • 总页数 78
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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