华北落叶松单亲本子代测定林遗传变异和选择研究

摘要

Study on genetic variation and selection of single parent progeny test is the basis of the work and an effective way for 1.5 generation seed orchard and a way to improve the quality of seed orchard .Progeny test of 20 years Larix principis-rup-prechtii seed orchard 70 single family in the Shanxi Province Jingle County State Seed Base of Larix principis-rupprechtii was studied.The results showed that different families between tree height and diameter at breast height had difference ;through the tree height and diameter at breast height , dual optimization were selected a pedigree with 25, and uniform numbers;tree high genetic gain was 11.95%, diameter genetic gain amounted to 11.75%.The research has technological basis for seed or-chard upgrade replacement .%单亲本子代测定林遗传变异的研究是种子园升级换代,建设1.5代种子园的基础工作,是种子园提高种子质量的有效途径. 通过对山西省静乐县国家华北落叶松良种基地20年生华北落叶松种子园70个单亲本家系子代测定林进行研究,结果显示:不同家系间树高和胸径差异显著;通过树高和胸径双重选优,共选出优良家系25个,并进行了统一编号;树高遗传增益为11.95%,胸径遗传增益达11.75%.为种子园升级换代奠定了技术基础.