基于生长与材性性状的灰楸优良无性系初选
Primary Selection of Excellent Catalpa fargesii Clones Based on Growth and Wood Properties
[目的]为筛选速生,材质优良的灰楸无性系。[方法]本研究测定了来自不同生态区(4个省份)的 200个灰楸无性系 1年,9年,11年和 13年生的生长性状(树高和胸径),13年生的材性性状(Pilodyn值和弹性模量),并进行了遗传变异分析和重复力估算,分析了性状间,及性状与地理气候因子的相关性;利用综合评价法结合育种值选择优良无性系。[结果]灰楸各性状在无性系间差异极显著,变异系数介于 12.12%-26.17%,重复力介于 0.79-0.97.9年生,11年生和 13年生间的生长性状显著相关;11年生和 13年生生长和材性性状呈极显著负相关;9年生,11年生和 13年生的生长性状和 13年生的Pilodyn值与海拔呈正相关,与经度呈负相关。[结论]早期选择生长和材性优良无性系的的适宜树龄为 11年生,选择出 9个生长优良无性系,6个优质木材无性系,3个生长与材性性状均较优的无性系,为灰楸无性系进一步优选奠定基础。此外,西部高海拔地区的灰楸生长快,而东部低海拔地区的灰楸材性较好,可为不同生态区灰楸无性系的选择提供参考。
[Objective]To select excellent clones characterized by fast growth and high-quality wood of Catalpa fargesii Bur.[Method]Growth traits,including height and diameter at breast height(DBH)at 1,9,11 and 13 years old,were collected and wood properties,including the Pilodyn value and elastic modulus at age 13 of 200 clones of C.fargesii from different ecological areas(four provinces),were measured.[Result]Genetic variation analysis and repeatability estimation were carried out.The correlation between the characteristics and the correlation between the characteristics and the geographical and climatic factors were analyzed.Excellent clones were selected by a comprehensive evaluation method combined with breeding values.The traits of C.fargesii were significantly different among the clones.The coefficient of variation(CV)ranged from 12.12%to 26.17%,and the repeatability(R)ranged from 0.79 to 0.97.The growth traits among ages of 9,11 and 13 were significantly correlated,and the growth traits at ages of 9,11 and 13 and Pilodyn values at the age of 13 were positively correlated with altitude and negatively correlated with longitude.Tree growth at ages of 11 and 13 showed a high negative correlation with wood properties.[Conclusion]The suitable tree age for the early selection of clones with excellent growth and wood properties is 11 years old.Nine clones with excellent growth,six clones with high-quality wood and three clones with great growth and wood properties were selected,which laid a foundation for further optimization of C.fargesii clones.Additionally,C.fargesii clones in the western and high-altitude areas featured fast growth,while those in the eastern and low-altitude areas had better wood properties.This study serves as a reference for the selection of C.fargesii clones in different ecological areas.
于晓池;张鹏;王军辉;易飞;麻文俊;
东北林业大学,黑龙江哈尔滨 150040##林木遗传育种全国重点实验室,国家林业和草原局林木培育重点实验室,中国林业科学研究院林业研究所,北京,100091;东北林业大学,黑龙江哈尔滨 150040;林木遗传育种全国重点实验室,国家林业和草原局林木培育重点实验室,中国林业科学研究院林业研究所,北京,100091;林木遗传育种全国重点实验室,国家林业和草原局林木培育重点实验室,中国林业科学研究院林业研究所,北京,100091;林木遗传育种全国重点实验室,国家林业和草原局林木培育重点实验室,中国林业科学研究院林业研究所,北京,100091;
Catalpa fargesii genetic variation comprehensive evaluation method breeding value excellent clone breeding.
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