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Genetic analysis of plant height and diameter at ground level of silver birch (Betula platyphylla) seedlings

Published online by Cambridge University Press:  01 October 2008

Gao Fu-Ling ,
Li Shao-Chen  and
Jiang Ting-Bo
Gao Fu-Ling
Affiliation:
Key Laboratory of Forest Tree Genetic Improvement and Biotechnology, Ministry of Education, Northeast Forestry University, Harbin 150040, China
Li Shao-Chen
Affiliation:
Key Laboratory of Forest Tree Genetic Improvement and Biotechnology, Ministry of Education, Northeast Forestry University, Harbin 150040, China
Jiang Ting-Bo*
Affiliation:
Key Laboratory of Forest Tree Genetic Improvement and Biotechnology, Ministry of Education, Northeast Forestry University, Harbin 150040, China
*
*Corresponding author. E-mail: tbjiang@yahoo.com
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Abstract

Six silver birch (Betula platyphylla) parents of diverse provenances were crossed according to Griffing 4 diallel design, and the plant height and diameter at ground level (DGL) of their F1 progeny were observed. The analysis of general combining ability (GCA) and specific combining ability (SCA) showed that two phenotypes were simultaneously controlled by additive and non-additive effects. The GCA between two phenotypes in a parent, and GCA of the same phenotype among different parents displayed significant differences: Q2 from Qingyuan was the best of the parents, followed by M2 from Maoer-mountain. On the other hand, the SCA of two phenotypes in a cross and the SCA of a phenotype among different crosses also varied considerably: the cross between E8 from Finland and Q1 from Qingyuan showed the highest SCA of plant height and DGL. The heritability of plant height and diameter at ground level was strong (over 60%), suggesting that these phenotypes can be used for early selection.

Keywords

Betula platyphylladiallel crossgeneral combining abilityspecific combining abilityheritability
Type
Research Papers
Information
Chinese Journal of Agricultural Biotechnology , Volume 5 , Issue 2 , August 2008 , pp. 147 - 151
Copyright
Copyright © China Agricultural University 2008

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Footnotes

First published in Journal of Agricultural Biotechnology 2008, 16(1): 134–137

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