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Estimation of genetic parameters on growth characteristics of a 35-year-old Pinus koraiensis progeny trial in South Korea
Journal of Forestry Research ( IF 3 ) Pub Date : 2020-11-17 , DOI: 10.1007/s11676-020-01257-w
Kyungmi Lee , In Sik Kim , Seok Woo Lee

The effects of genetic and environmental factors on Pinus koraiensis growth were studied based on a 35 year-old progeny trial composed of open-pollinated offspring of twenty-one plus trees. Height, DBH and volume of the offspring was analyzed using restricted maximum likelihood/best linear unbiased prediction in mixed model analysis. Significant site and family effects on the three traits were observed. The distinct growth of offspring by site with disparate climates corroborated the importance of planting species in suitable conditions. Growth differences by family was significant, emphasizing the importance of identifying families with either superior or inferior performance. The parental ranking was assigned in the sites, inferring the breeding value of each plus tree. The estimates of individual heritability (\(\widehat{{h}_{i}^{2}}\)) of height, DBH and volume growth were 0.169–0.645, 0.108–0.331 and 0.129–0.343 respectively, with higher \(\widehat{{h}_{i}^{2}}\) of the height than DBH on each site. Coefficient of variance of genetic effect was higher with DBH in some cases, indicating the scope for selection is larger for this trait despite the lower heritability compared to height. For the variation between families in terms of the performance stability across sites, consideration of the genotype by environment interaction is required in selecting materials to be used in reforestation with Korean pine. A few families with either superior or inferior performance retained their parental ranking for at least a decade. Other families with increased growth on a particular site were identified, indicating their high breeding value and low stability. Differences in the genetic performance of the families by site requires delineation of the breeding region of the species.



中文翻译:

韩国35年生红松子代试验生长特性遗传参数估计

遗传和环境因素对红松的影响生长是基于 35 岁的后代试验研究的,该试验由 21 多棵树的开放授粉后代组成。在混合模型分析中使用受限最大似然/最佳线性无偏预测分析后代的高度、DBH 和体积。观察到对三个性状的显着位点和家族效应。不同气候下不同地点的后代的明显生长证实了在合适的条件下种植物种的重要性。不同家庭的成长差异非常显着,强调了识别表现优异或较差的家庭的重要性。在站点中分配亲本排名,推断每棵加树的育种价值。个体遗传力的估计 ( \(\widehat{{h}_{i}^{2}}\)) 的高度、DBH 和体积增长分别为 0.169–0.645、0.108–0.331 和 0.129–0.343,其中\(\widehat{{h}_{i}^{2}}\)每个站点上的高度比 DBH。在某些情况下,DBH 的遗传效应方差系数更高,这表明尽管与身高相比遗传力较低,但该性状的选择范围更大。对于不同地点的性能稳定性方面的家庭之间的差异,在选择用于红松再造林的材料时需要考虑环境相互作用的基因型。一些表现优异或较差的家庭至少在十年内保持了父母的排名。确定了在特定地点生长增加的其他家庭,表明它们的育种价值高,稳定性低。不同地点的家庭遗传性能的差异需要划定物种的繁殖区域。

更新日期:2020-11-17
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