欧洲云杉无性系幼龄生长节律、年度和密度互作效应及选择策略

欧阳; 欧阳芳群; 孙猛; 王超; 王军辉; 安三平; 王丽芳; 许娜; 王猛

doi:10.12302/j.issn.1000-2006.202112031

欧阳, 欧阳芳群, 孙猛, 王超, 王军辉, 安三平, 王丽芳, 许娜, 王猛

南京林业大学学报（自然科学版） ›› 2023, Vol. 47 ›› Issue (6) : 95-104.

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南京林业大学学报（自然科学版） ›› 2023, Vol. 47 ›› Issue (6) : 95-104. DOI: 10.12302/j.issn.1000-2006.202112031

研究论文

欧洲云杉无性系幼龄生长节律、年度和密度互作效应及选择策略

欧阳 ¹^,² ,
欧阳芳群 ³^,^* ,
孙猛 ³ ,
王超 ³ ,
王军辉 ¹^,^* ,
安三平 ⁴ ,
王丽芳 ⁴ ,
许娜 ⁴ ,
王猛 ²

作者信息 +

Young growth rhythm, annual and density interaction effects and selection strategies of Picea abies clones

OU Yang ¹^,² ,
OUYANG Fangqun ³^,^* ,
SUN Meng ³ ,
WANG Chao ³ ,
WANG Junhui ¹^,^* ,
AN Sanping ⁴ ,
WANG Lifang ⁴ ,
XU Na ⁴ ,
WANG Meng ²

Author information +

文章历史 +

摘要

【目的】通过对欧洲云杉(Picea abies)无性系的生长性状进行遗传测定及选优,为甘肃省天水小陇山地区欧洲云杉的良种选育与推广应用提供参考。【方法】以幼龄捷克种源的欧洲云杉267个无性系为试材,调查4~9 a的生长量,分析无性系间的差异,估算无性系重复力,分析不同年份间的相关性,并开展优良无性系的初选。【结果】9 a树高平均值在(269.79 ±41.3) cm。4~9 a树高无性系重复力0.45~0.69,高重复力表明无性系具有选择潜力。分年龄遗传变异评价结果显示生长性状(树高、胸径、冠幅、新梢长和侧枝数等)在区组间、无性系间和无性系与区组互作效应都存在显著差异,且受无性系与区组互作效应影响较大(方差分量20.37%~27.23%)。综合各年数据方差分析显示年龄、区组、无性系、年龄和无性系互作效应、区组和无性系互作效应均显著影响树高生长,主要受年龄效应影响,方差分量70.05%;其次是受区组与无性系的互作效应影响,方差分量7.59%。年龄和无性系的互作效应相对较小,方差分量1.23%。年龄间树高表型相关(相关系数0.61~0.95)、遗传相关(0.62~0.97)和环境相关(0.63~0.95)均存在呈极显著正相关关系。以9 a树高相对遗传值由高到低依次进行选择,共选择出10个优良无性系,平均树高342.57~432.40 cm,入选率为3.7%,现实遗传增益9.72%~16.89%,预期遗传增益65.66%~107.88%。入选无性系与对照无性系树高比较结果显示4~9 a树高均值排序都是入选无性系大于对照无性系。采用Finlay-Wilkinson模型对4~9 a无性系树高均值进行了稳定性分析,无性系树高生长越快,稳定性模型估计值越大,无性系稳定性反而越差。年均树高增量与年极端高温呈显著正相关,与年降水量呈负相关。【结论】欧洲云杉无性系生长性状存在广泛遗传变异,重复力高,具有选择基础。以9 a树高性状遗传值选择出的10个欧洲云杉无性系可在甘肃天水小陇山地区推广应用。年份间极端高温和年均降水量的差异或许是入选无性系在年份间表现不稳定性的原因。

Abstract

【Objective】 This reseach aims to select Picea abies varieties for reforestation in Xiaolongshan area of Tianshui of Gansu Province based on analyses of early growth and genetic traits. 【Method】 Using 267 P. abies clones of young Czech provenance as test materials, we evaluated the growth and clone repeatability of 4 to 9 years old spruce trees, and the relationship with year, then the elite clones were chosen. 【Result】 The average tree height of 9 years old spruce was (269.79±41.3) cm. The repeatability of the clones during the period of 4 to 9 years old was 0.45 to 0.69, and the high repeatability indicated that the clones had selection potential. Age-specific genetic variation in growth traits (tree height, diameter at breast height, crown width, shoot length and number of collaterals, etc.) differed significantly among blocks and clones with pronounced interactions between the two (variance component 20.37%-27.23%). Tree height growth was affected by age, block, clone, interactions between age and clone, and between block and clone with variance component ranking order from high to low: age (70.05%), followed by the interactions between block and clone (7.59%), and between age and clone (1.23%). Significant positive correlations among growth years were found for tree height phenotypic traits (0.61-0.95), genetic traits (0.62-0.97) and environmental variables (0.63-0.95). Ten clones were selected for reforestation in the Xiaolongshan area based on the relative genetic value of the 9-year-old tree height with an average tree height of 369.7 cm. The selection rate was 3.7%, and the actual genetic enhancement for tree height was 9.72%-16.89% with an expected genetic enhancement of 65.66%-107.88% at tree mature stage. The average tree heights of the selected clones were higher than the control clones in 4 to 9 years with a substantial variation in height growth among different years. The Finlay-Wilkinson model was used to analyze the stability of the mean tree height of clones from 4 to 9 years old. The better the growth of the clone, the higher the estimated value of stability, indicating that the clone was more unstable. Annual average tree height increment correlated positively with the annual extreme high temperature, and negatively with the annual rainfall. 【Conclusion】 P. abies clones have extensive genetic variation in growth traits, high repeatability, and are opted for selection. The 10 P. abies clones selected based on their genetic values of tree height at 9 years can be used for afforestation in the Xiaolongshan area of Tianshui, Gansu. Differences in extreme high temperature and average annual rainfall between years may account for the instability of the selected clones across tree ages.

导出引用

欧阳, 欧阳芳群, 孙猛, 等. 欧洲云杉无性系幼龄生长节律、年度和密度互作效应及选择策略[J]. 南京林业大学学报（自然科学版）. 2023, 47(6): 95-104 https://doi.org/10.12302/j.issn.1000-2006.202112031

OU Yang, OUYANG Fangqun, SUN Meng, et al. Young growth rhythm, annual and density interaction effects and selection strategies of Picea abies clones[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2023, 47(6): 95-104 https://doi.org/10.12302/j.issn.1000-2006.202112031

中图分类号： S722.5

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