油松自由授粉家系分阶段测定与选择的差异分析  

Analysis of Stage Test and Height Selection of Open-pollinated Pinus tabulaeformis Family

作　　者：李青粉[1] 马建伟 王军辉[1] 王亚南[1] 潘春林 

机构地区：[1]中国林业科学研究院林业研究所国家林业局林木培育重点实验室,北京100091 [2]甘肃小陇山林业科学研究所,甘肃天水741022

出　　处：《林业科学研究》2015年第4期451-456,共6页Forest Research

基　　金："十二.五"国家科技支撑计划课题"北方针叶树种高世代育种技术研究与示范"课题(2012BAD01B01)

摘　　要：为了分阶段测定油松自由授粉家系间差异和选择油松优良家系,对82个油松家系(22年生)进行生长性状的遗传变异分析,分析树高和胸径的年-年遗传相关、表型相关及历年的遗传方差和环境方差、遗传及表型变异系数、遗传力的同时,研究不同林龄树高和胸径与22年生时材积的相关关系。结果表明:油松家系间树高、材积等生长存在极显著差异。结合早期选择效率和选择正确率及去劣错误率,认为油松优良家系选择是可以在早期进行的,其初选年龄应是9年生时。此外,在22年生时以材积育种值为选择指标,筛选出24个油松优良家系,其单株材积实际增益分别较对照28、95和106增加了36.54%、8.92%和18.63%。最终选出速生优良家系和二代优树61株,子代测定林入选二代优树的材积遗传增益分别较对照28、95和106增加了57.74%、25.81%和37.03%。所选出的优良家系和优良单株可作为油松育种材料在生产上推广应用。In order to estimate the differences among Pinus tabulaeformis families and to select elite family, 82 P. tabu- laeformis families with the age of 22 were used to analysis the genetic variation of their growth traits, including the genetic correlation, the phenotype correlation, the genetic variance and environmental variance, the genetic variation coefficient and phenotype variation coefficient, and the heritability. The estimation parameters of early selection were the height and diameters at breast height （DBH）. The height of trees was measured at the 5- 10th year and the 22nd year, while the DBH was measured at the 22nd year. The results showed that increments of height and volume were very different among P. tabulaeformis families. Integrated with selection efficiency, accuracy percentage and mistake percentage, family selec- tion of P. tabulaeformis might be carried out at the early stage; the first selection should be at the 9th year. In addition, on the basis of volume breeding value, twenty four families were selected at the 22nd year, whose actual gains of volume were 36.54%, 8.92% and 18.63% higher compared with 3 controls respectively. Total 61 individuals derived from 25 families were selected as the second-generation elite trees by combined selection, and the expected genetic gains of prog- eny test stands were 57.74%, 25.81% and 37. 03%, respectively. The selected elite families and trees were superior breeding materials of P. tabulaeformis for plantation establishment on a large scale.

关 键 词：油松 家系 生长性状 遗传变异 早期选择 

分 类 号：S722.3[农业科学—林木遗传育种]