Natural variation and genetic parameters in Fraser fir for growth and Christmas tree traits
作者:
R.J. Arnold,
J.B. Jett,
S.E. McKeand,
期刊:
Canadian Journal of Forest Research
(NRC Available online 1994)
卷期:
Volume 24,
issue 7
页码: 1480-1486
ISSN:0045-5067
年代: 1994
DOI:10.1139/x94-191
出版商: NRC Research Press
数据来源: NRC
摘要:
Open-pollinated progeny trials of Fraser fir (Abiesfraseri(Pursh) Poir.) assessed at 8 years provided genetic parameter estimates for growth, Christmas tree quality traits, and wholesale value at harvest age. Significant variation was found between and within nine different seed sources. Estimated individual tree heritabilities of important traits ranged from a low of 0.13 for USDA Christmas tree grade to a moderate value of 0.33 for crown diameter. Heritabilities within the better performing seed sources tended to be higher. Of the two traits that determine wholesale value, USDA grade and height class, the latter proved to have the greater influence, both phenotypically and genetically. Genetic correlations of early age height growth with 8-year total height, height class, USDA Christmas tree grade, and individual tree wholesale value proved favorable and strong (range of 0.57–0.96). In combination with moderate heritabilities for early growth traits, such correlations provide potential for effective early age selections in Fraser fir Christmas trees.
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