These authors contributed equally to this work.
Populus trichocarpa cell wall chemistry and ultrastructure trait variation, genetic control and genetic correlations
Article first published online: 20 DEC 2012
© 2012 The Authors. New Phytologist © 2012 New Phytologist Trust
Volume 197, Issue 3, pages 777–790, February 2013
How to Cite
Porth, I., Klápště, J., Skyba, O., Lai, B. S. K., Geraldes, A., Muchero, W., Tuskan, G. A., Douglas, C. J., El-Kassaby, Y. A. and Mansfield, S. D. (2013), Populus trichocarpa cell wall chemistry and ultrastructure trait variation, genetic control and genetic correlations. New Phytologist, 197: 777–790. doi: 10.1111/nph.12014
- Issue published online: 7 JAN 2013
- Article first published online: 20 DEC 2012
- Manuscript Accepted: 18 SEP 2012
- Manuscript Received: 25 JUL 2012
- Genome British Columbia Applied Genomics Innovation Program. Grant Number: 103BIO
- BioEnergy Science Center
- US Department of Energy (DOE) Bioenergy Research Center. Grant Number: DE-AC02-05CH11231
- biofuel traits;
- genetic correlation;
- narrow-sense heritability;
- Populus trichocarpa ;
- wood chemistry;
- wood composition;
- wood physical properties
- The increasing ecological and economical importance of Populus species and hybrids has stimulated research into the investigation of the natural variation of the species and the estimation of the extent of genetic control over its wood quality traits for traditional forestry activities as well as the emerging bioenergy sector. A realized kinship matrix based on informative, high-density, biallelic single nucleotide polymorphism (SNP) genetic markers was constructed to estimate trait variance components, heritabilities, and genetic and phenotypic correlations.
- Seventeen traits related to wood chemistry and ultrastructure were examined in 334 9-yr-old Populus trichocarpa grown in a common-garden plot representing populations spanning the latitudinal range 44° to 58.6°. In these individuals, 9342 SNPs that conformed to Hardy–Weinberg expectations were employed to assess the genomic pair-wise kinship to estimate narrow-sense heritabilities and genetic correlations among traits.
- The range-wide phenotypic variation in all traits was substantial and several trait heritabilities were > 0.6. In total, 61 significant genetic and phenotypic correlations and a network of highly interrelated traits were identified.
- The high trait variation, the evidence for moderate to high heritabilities and the identification of advantageous trait combinations of industrially important characteristics should aid in providing the foundation for the enhancement of poplar tree breeding strategies for modern industrial use.