生长和木材性状耦合评价红松半同胞家系
王雪来 , 刘晓婷 , 王力冉 , 李诗童 , 张太进 , 张嘉峰 , 许经华 , 曲冠证 , 赵曦阳
植物研究 ›› 2024, Vol. 44 ›› Issue (04) : 554 -564.
生长和木材性状耦合评价红松半同胞家系
Coupling Evaluation of Growth and Wood Properties of Pinus koraiensis Half-sib Families
红松(Pinus koraiensis)是东北地区重要的果材兼用树种,但由于生长周期长,遗传改良进展缓慢,为评价和筛选优质红松种质资源,以吉林省永吉县西阳林木种子园内36个20年生红松半同胞家系为材料,对其生长性状和木材性状进行测定。方差分析结果表明,各性状在家系间差异均达显著水平(P<0.01),各性状表型变异系数为5.89%~45.21%;除通直度(0.46)外,其他性状的家系遗传力均超过0.5,属于高遗传力。相关分析结果表明,树高、胸径等生长性状间均达极显著正相关水平(r>0.663),木材性状间半纤维素、纤维素和综纤维素含量间达显著相关水平,而生长性状与木材性状间仅纤维素含量、综纤维素含量与部分生长性状呈显著负相关。主成分分析结果表明,14个性状构成5个主成分,累计贡献率为79.24%。利用综合评价法对36个半同胞家系进行评价,以10%的入选率,依据生长性状,初步筛选3个优良家系(家系PK61、PK29和PK22),各生长性状遗传增益为6.41%~33.91%;依据木材性状,初步筛选3个优良家系(家系PK16、PK78和PK10),各木材性状遗传增益为1.08%~6.72%;结合生长和木材性状初步筛选出3个优良家系(家系PK61、PK29和PK44),各指标遗传增益为0.27%~37.28%。该研究选出的优良家系可为红松良种选用提供基础。
Pinus koraiensis is an important tree species used as fruit in northeast China, but due to its long growth cycle, its genetic improvement progress is slow. In order to evaluate and screen the elite P. koraiensis germplasm resources, 36 half-sib families of 20-year-old P. koraiensis from Xiyang forest seed orchard in Jilin Province were used as materials, and the growth traits and wood properties of different families were investigated. The results of variance analysis showed that the differences of each trait among families reached extremely significant level(P<0.01), and the phenotypic variation coefficients of different investigated traits was 5.89%~45.21%. Except trait straightness(0.46), the family heritabilities of other traits exceeded 0.5, which all belonged to high heritability. Correlation analysis results showed that the growth traits such as tree height and diameter at breast height had significantly positive correlations(r>0.663). The contents of hemicellulose, cellulose and holocellulose were significantly correlated with each other among wood traits, while only cellulose and holocellulose were negatively correlated with some growth traits among growth traits and wood properties. The results of principal component analysis showed that 14 traits constituted five principal components, and the cumulative contribution rate was 79.24%. The comprehensive evaluation method was used to evaluate 36 half-sib families, with an admission rate of 10%, three elite families(PK61, PK29 and PK22) were selected according to their growth traits, and the genetic gain of each growth trait ranged from 6.41%- 33.91%. According to wood properties, three elite families(PK16, PK78 and PK10) were preliminarily screened, and the genetic gain of each wood trait ranged from 1.08%-6.72%. Combined with growth and wood properties, three excellent families(PK61, PK29 and PK44) were selected, and the genetic gain of each index ranged from 0.27%-37.28%. The elite families selected in this study can provide the basis for the selection of improved varieties of P. koraiensis.
红松 / 生长性状 / 木材性状 / 遗传变异 / 评价选择
Pinus koraiensis / growth trait / wood property / heritable variation / evaluation and selection
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