Genetic parameters of 2‐year‐old full‐sib families ofPinus contortaand correlation with field test data
作者:
Anders Fries,
期刊:
Scandinavian Journal of Forest Research
(Taylor Available online 1989)
卷期:
Volume 4,
issue 1-4
页码: 137-147
ISSN:0282-7581
年代: 1989
DOI:10.1080/02827588909382553
出版商: Taylor & Francis Group
关键词: Pinus contorta;height growth;general and specific combining ability;maternal effects;coefficient of variation;progeny testing;early testing;growth rhythm
数据来源: Taylor
摘要:
Height increment among full‐sib families of lodgepole pine plus trees were assessed during different growth phases of the first and second year in nursery. The percentage of the total variance in seedling height and increment due to general combining ability was similar for all growth phases (4–6%). Specific combining ability was significant only at 5 weeks in year 1 (16.2%). Maternal effects were significant at 5 weeks both in year 1 (10.0%) and year 2 (2.5%). Total increment each year was not maternally influenced. The variance component of general combining ability and also the coefficient of variation for height were of a similar size among the corresponding half‐sib families in a 10‐year‐old field test, while the family ranking differed. Present results indicate that breeding should follow methods that make use of general combining ability.
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