Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, Daqiao Rd 73, Fuyang area, Hangzhou, 311400, P. R. China.
Zhejiang Provincial Key Laboratory of Tree Breeding, Daqiao Rd 73, Fuyang area, Hangzhou, 311400, P. R. China.
Sci Rep. 2020 Mar 13;10(1):4653. doi: 10.1038/s41598-020-61597-9.
Adaptive of trees and its correlation with the climatic are causing changes in tree species performance and distribution, which will change breeding programs and influence forest productivity. To further evaluate the joint influence of climatic factors and provenance on the ring width (RW) and ring density (RD) of Masson pine. We selected 18 provenances at Chun'an (CA) and Taizi Mountain (TZS) test site, which representing four different breeding regions, including the south, west, north and east-central regions. The results showed that the provenance effects were significantly for the RW and RD. The provenances from high temperature and low latitude regions had greater mean RW compared to species from local and cold sources. The geographical genetic variation in wood traits is generally weak. The correlation between RW of Masson pine and precipitation was stronger in the relatively arid TZS site compared with that in relatively wet CA site, as well as the effect of temperature and precipitation on RD was earlier than that in CA test site. The response relationship between establishing the width of tree rings and the environmental variables of provenance indicated that during the transition from the northern and western breeding regions to the eastern and southern breeding regions, the response of RW to climate factors changed from being temperature-based to being precipitation-based. In addition, the response of provenance to the climate of seed sources origin showed their own variation characteristics in each breeding area. Therefore, genetic improvement of big diameter wood and wood density can be gain through selection of provenance and analysis of adaptability.
树木的适应性及其与气候的相关性导致了树种性能和分布的变化，这将改变繁殖计划并影响森林生产力。为了进一步评估气候因素和起源地对马尾松的年轮宽度（RW）和年轮密度（RD）的联合影响。我们选择了在淳安（CA）和太子山（TZS）试验点的 18 个起源地，它们代表了四个不同的繁殖区，包括南部、西部、北部和中东部地区。结果表明，起源地对 RW 和 RD 的影响显著。与当地和寒冷来源的物种相比，来自高温和低纬度地区的起源地具有更大的平均 RW。木材性状的地理遗传变异通常较弱。与相对湿润的 CA 试验点相比，在相对干燥的 TZS 试验点，马尾松 RW 与降水的相关性更强，并且温度和降水对 RD 的影响比 CA 试验点更早。建立树木年轮宽度与起源地环境变量的响应关系表明，在从北部和西部繁殖区向东部和南部繁殖区过渡的过程中，RW 对气候因子的响应从以温度为基础转变为以降水为基础。此外，起源地对种子源气候的响应在每个繁殖区表现出自身的变化特征。因此，可以通过选择起源地和分析适应性来获得大直径木材和木材密度的遗传改良。
