Evaluation of an international series of Pinus kesiya provenance trials for growth and wood quality traits
Evaluation of an international series of Pinus kesiya provenance trials for growth and wood quality traits
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对国际系列克西亚松种源试验的生长和木材质量特性进行评估
DOI：
10.1016/j.foreco.2008.02.027
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发表时间：
2008
影响因子：
3.7
通讯作者：
L. Graudal
中科院分区：
文献类型：
--
作者：
João Costa e Silva;L. Graudal
本研究介绍了在哥伦比亚、南非、斯威士兰、越南和津巴布韦建立的七个思茅松国际种源试验的结果。评价的性状为每公顷总体积、茎直度、分支直径、分叉和狐尾形，在种植后5、6、7或8年的年龄。供试材料包括28个种子园，包括24个种源，从物种分布的自然范围和4个当地的种子来源，从马达加斯加和赞比亚。存活率通常很高，在大多数试验中百分比超过85%。每公顷总蓄积量、茎直度、分支直径和狐尾形在所有测定这些性状的试验中都发现了显著的种源方差。分叉表现出显着的种源方差，只有四个测量的七个试验。单性状的跨站点分析采用因子分析结构来模拟每个试验中的种源效应，并表明基因型与环境相互作用的实际重要性对于所研究的性状并不大，因为大多数种源在试验站点之间没有显示相关的排名变化。双变量分析表明，每公顷总体积，茎直和分叉的种源相关性在统计上显着，中等到高，他们的迹象表明，同时改善这些性状的种源选择。然而，这些性状与狐尾效应呈显著负相关。种源间分支直径与其它性状的相关性一般较低，不显著。越南种源以及马达加斯加和赞比亚的当地种子来源提供了生长和木材质量性状的有利组合，因此对种源研究、种子供应和育种具有重要价值。
This study presents the results from seven international provenance trials of Pinus kesiya established in Colombia, South Africa, Swaziland, Vietnam and Zimbabwe. The traits evaluated were total volume per hectare, stem straightness, branch diameter, forking and foxtailing, at ages 5, 6, 7 or 8 years from planting. The tested material included 28 seedlots, comprising 24 provenances from the natural range of the species distribution and four local seed sources from Madagascar and Zambia. Survival was generally high, with percentages exceeding 85% in most of the trials. Significant provenance variance was found for total volume per hectare, stem straightness, branch diameter and foxtailing in all of the trials where these traits were measured. Forking exhibited significant provenance variance in only four of the seven trials measured. Across-site analysis for single traits used a factor analytic structure to model the provenance effects in each trial, and indicated that the practical importance of genotype by environment interaction was not great for the examined traits, as the majority of the provenances did not display relevant ranking changes across trial sites. Bivariate analysis across sites indicated that provenance correlations involving total volume per hectare, stem straightness and forking were statistically significant, moderate to high, and their signs suggested that simultaneous improvement could be achieved in these traits following provenance selection. However, these traits were significantly and adversely correlated with foxtailing. Provenance correlations between branch diameter and the other traits were generally low and not significantly different from zero. Vietnamese provenances, as well as local seed sources from Madagascar and Zambia, provided favourable combinations of growth and wood quality traits, and thus could have an important value for provenance research, seed supply and breeding.