• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >A genetic architecture study of coast redwood.
【24h】

A genetic architecture study of coast redwood.

机译：海岸红杉的遗传结构研究。

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

Three related areas of forest tree genetics and physiology of coast redwood are addressed in this study: (a) neighbor analysis, (b) genetic architecture, and (c) calorimetry technique.; This study employed 174 clones from the entire native range of coast redwood sampling 81 native stands in California and Oregon. In order to reduce patchy environmental variation in the plantation, a spatial nearest-neighbor adjustment was performed. After neighbor adjustment, clonal standard deviations decreased in 70% of clones and estimates of clonal components of variance and of heritabilities were increased.; The genetic architecture of coast redwood was studied using neighbor-adjusted values of eight metric traits, six traits derived from the metric traits and three categorical traits. For traits with statistically significant genetic components, the regional component of variance was estimated from 4 to 6% of the total variation; the stands-within-regions component was 7 to 13%; and the clonal component was 11 to 21%.; Phenotypic correlations between size-related metric traits and metabolic heat rates were low to moderate (0.03 to 0.24) and they were high between bole height and other bole-size traits (0.69 to 0.86). Genetic correlations were very high between metabolic heat rates and 1990 height (0.98) and between stem volume index and primary metric traits (0.64 to 1.08).; Dark green and dark blue-green foliage colors were more frequent among trees from environments with high extreme temperatures. Branch angle and crown density differences, while significantly varying among regions, did not occur in consistent pattern among the regions.; Both tree size and metabolic heat rate differed in response to the different environments in the plantation, and heat rate also varied with time during the growing season. Metabolic heat rate averaged over a 5-to-6-week period was strongly related to height growth over that period (R{dollar}sp2{dollar} = 0.93).; High metabolic heat and low origin latitude were significantly associated with large tree size. Origin longitude, elevation and distance from the sea were less strongly associated with tree size. These five factors together accounted for 26 to 29% of variation in tree height and stem volume.; Among several calorimetric parameters investigated, high-temperature stability, the temperature of peak activity, and the peak metabolic heat rate were all substantially different among samples from five contrasting regions, all lower in north and coastal populations and higher in south and interior populations. The first two also varied significantly between clones from the same locations within regions.
机译：本研究研究了林木遗传学和海岸红杉生理的三个相关领域：（a）邻居分析，（b）遗传结构和（c）量热技术。这项研究使用了来自沿海红木整个本地范围的174个克隆，在加利福尼亚和俄勒冈州采样了81个本地林。为了减少人工林中片状的环境变化，进行了空间最近邻调整。邻居调整后，克隆标准差在70％的克隆中降低，对克隆方差和遗传力的估计增加。使用八个度量标准特征，从度量标准特征派生的六个特征和三个分类特征的邻居调整值，研究了海岸红杉的遗传结构。对于具有统计学上显着遗传成分的性状，变异的区域成分估计为总变异的4％至6％；区域内展台比例为7％至13％；克隆成分为11％至21％。大小相关的指标性状与代谢热率之间的表型相关性低至中等（0.03至0.24），而在猪高和其他猪大小性状之间则呈高相关性（0.69至0.86）。代谢热率与1990年身高之间（0.98）以及茎体积指数与主要指标性状（0.64至1.08）之间的遗传相关性非常高。在极端高温环境中的树木中，深绿色和深蓝绿色的叶子颜色更为常见。分支角和冠密度差异虽然在各区域之间有很大差异，但在各区域之间并未以一致的方式出现。树木的大小和代谢热率都因种植园中的不同环境而有所不同，并且生长期中热率也随时间而变化。在5至6周内平均的代谢热率与该期间的身高增长密切相关（R {dollar} sp2 {dollar} = 0.93）。高代谢热和低原产地纬度与大树大小显着相关。原点的经度，海拔和离海的距离与树木的大小相关性较小。这五个因素合计占树高和树干体积变化的26％至29％。在所研究的几个量热参数中，五个对比区域的样品之间的高温稳定性，峰值活性温度和峰值代谢热速率均存在显着差异，在北部和沿海地区的人群均较低，而在南部和内部人群的均较高。前两个在区域内相同位置的克隆之间也显着不同。

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