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Research article - Peer-reviewed, 2022

Genetic architecture behind developmental and seasonal control of tree growth and wood properties in Norway spruce

Chen, Zhi-Qiang; Zan, Yanjun; Zhou, Linghua; Karlsson, Bo; Tuominen, Hannele; Garcia-Gil, Maria Rosario; Wu, Harry X.;

Abstract

Genetic control of tree growth and wood formation varies depending on the age of the tree and the time of the year. Single-locus, multi-locus, and multi-trait genome-wide association studies (GWAS) were conducted on 34 growth and wood property traits in 1,303 Norway spruce individuals using exome capture to cover similar to 130K single-nucleotide polymorphisms (SNPs). GWAS identified associations to the different wood traits in a total of 85 gene models, and several of these were validated in a progenitor population. A multilocus GWAS model identified more SNPs associated with the studied traits than single-locus or multivariate models. Changes in tree age and annual season influenced the genetic architecture of growth and wood properties in unique ways, manifested by non-overlapping SNP loci. In addition to completely novel candidate genes, SNPs were located in genes previously associated with wood formation, such as cellulose synthases and a NAC transcription factor, but that have not been earlier linked to seasonal or age-dependent regulation of wood properties. Interestingly, SNPs associated with the width of the year rings were identified in homologs of Arabidopsis thaliana BARELY ANY MERISTEM 1 and rice BIG GRAIN 1, which have been previously shown to control cell division and biomass production. The results provide toots for future Norway spruce breeding and functional studies.

Keywords

wood properties; seasonal variation; developmental stage; genome-wide association; Norway spruce

Published in

Frontiers in Plant Science

2022, volume: 13, article number: 927673
Publisher: FRONTIERS MEDIA SA

Authors' information

Swedish University of Agricultural Sciences, Department of Forest Genetics and Plant Physiology
Swedish University of Agricultural Sciences, Department of Forest Genetics and Plant Physiology
Zhou, Linghua
Swedish University of Agricultural Sciences, Department of Forest Genetics and Plant Physiology
Karlsson, Bo
Skogforsk
Swedish University of Agricultural Sciences, Department of Forest Genetics and Plant Physiology
Swedish University of Agricultural Sciences, Department of Forest Genetics and Plant Physiology
Swedish University of Agricultural Sciences, Department of Forest Genetics and Plant Physiology
Wu, Harry X. (Wu, Harry)
Commonwealth Scientific and Industrial Research Organisation (CSIRO)

UKÄ Subject classification

Forest Science

Publication Identifiers

DOI: https://doi.org/10.3389/fpls.2022.927673

URI (permanent link to this page)

https://res.slu.se/id/publ/118857