Abstract
• Context
A clear understanding of the genetic control of wood properties is a prerequisite for breeding for higher wood quality in Populus tomentosa Carr. hybrid clones.
• Aims
The experiments aimed at unraveling genetic and environmental effects on wood properties among triploid hybrid clones of P. tomentosa.
• Methods
We used 5-year-old clonal trials established in Northern China to assess the heritability of wood density and fiber traits. Two hundred seventy trees from nine clones were sampled in five sites.
• Results
Site had a very significant effect on all recorded traits. Despite this large site effect, a tight genetic control was detected and clonal repeatability varied between 0.53 and 0.95. Significant genotype × environment interactions were detected for most of the traits. Moderate to tight correlation were evidenced among traits but they were not consistent with that in several cases that were site-dependent.
• Conclusions
Our results revealed a tight genetic control over several wood properties and therefore breeding programs might be able to improve wood density, fiber length, and coarseness in these hybrids.
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Acknowledgments
The author would like to thank Fangdong Zhang and Yatong Xie from Tianjin University of Science and Technology for their assistance with fiber properties measurements.
Funding
This study was supported by the Forestry Public Benefit Research Foundation (20100400900-3).
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Handling Editor: Christophe Plomion
Contribution of the co-authors
FW was responsible for collecting wood disks sample, wood density and fiber properties measurements, for generating the phenotypic data set, analyzing the results, and the writing of the paper. This work is a part of his PhD thesis.
PDZ was responsible for planning and building the clonal trials and for collecting wood disks sample. He provides comments to statistical and genetic analysis. He co-writes the paper with FW.
JCP was responsible for planning the measurements of fiber properties and performing the LW fiber Tester at TUST.
XYK was responsible for planning and guiding this research. He provides comments to the text. He is supervisor of FW PhD.
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Wu, F., Zhang, P., Pei, J. et al. Genotypic parameters of wood density and fiber traits in triploid hybrid clones of Populus tomentosa at five clonal trials. Annals of Forest Science 70, 751–759 (2013). https://doi.org/10.1007/s13595-013-0307-7
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DOI: https://doi.org/10.1007/s13595-013-0307-7