Genotype-by-environment interaction in coast redwood outside natural distribution - search for environmental cues

Klápště, Jaroslav; Meason, Dean F.; Dungey, Heidi S.; Telfer, Emily; Silcock, Paul; Rapley, Simon

doi:10.1186/s12863-020-0821-1

Cited by 8 publications

(6 citation statements)

References 57 publications

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“…Because of these genetic traits Sequoia has been considered a prospective timber species for its potential adaptability out of its natural range in other countries with similar or environmentally different conditions in the face of climate change. Sequoia has been grown out of its endemic California region with varying degrees of success, depending upon the trial locations and climatic conditions, in different parts of the world, including France, Germany, Spain, Chile, Turkey, South Africa, and New Zealand (Kuser et al 1995;Meason et al 2016;Klápštĕ et al 2020;Breidenbach et al 2020;Ahuja 2021). Sequoia is generally vulnerable to prolonged frost conditions.…”

Section: Introductionmentioning

confidence: 99%

Origin and genetic nature of polyploidy in paleoendemic coast redwood (Sequoia sempervirens(D. Don) Endl.)

Ahuja

2022

Silvae Genetica

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It is not known when the polyploid coast redwood (Sequoia sempervirens) evolved from its diploid ancestors, and what is its type of polyploidy. Whether close relatives of Sequoia, giant sequoia (Sequoiadendron giganteum) and dawn redwood (Metasequoia glyptostroboides), have possibly contributed to the ancestry of hexaploid of Sequoia remains an open question. The nature of hexaploidy in Sequoia has baffled biologists for more than a century. Based on the chromosome configurations in Sequoia, G. Ledyard Stebbins was the first geneticists who postulated in 1948 that Sequoia is an autoallohexaploid (AAAABB), and an ancient species of Metasequoia might have been one of the putative ancestors of Sequoia. After its chromosome number (2n=6x=66) was confirmed in hexaploid Sequoia, the type of polyploidy in Sequoia has been further investigated for the past 70 years by a number of investigators, using cytogenetic and genetic data. Although an autoallohexaploid (AAAABB) origin of Sequoia has remained one of the dominant hypotheses until recently, an alternative hypothesis, amongst other possible origins, was also put forth by Ahuja and Neale (2002), that Sequoia may be partially diploidized autohexaploid (AAAAAA), derived from some ancestral species of Sequoia, thus carrying a single ancestral genome. Cytogenetic, molecular genetics, and genome sequence data now support the hypothesis that Sequoia originated as an autohexaploid.

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Section: Introductionmentioning

confidence: 99%

Origin and genetic nature of polyploidy in paleoendemic coast redwood (Sequoia sempervirens(D. Don) Endl.)

Ahuja

2022

Silvae Genetica

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“…Therefore, the optimal parameters to realize the benefits of genomic selection for herbivory may need more research. However, more evidence of the superior performance of genomic models in resistance studies is available from pathosystems in P. radiata ( Klápště, Meason, et al 2020 ) and other conifers ( Resende et al 2012 ; Carpenter et al 2018 ; González-Camacho et al 2018 ).…”

Section: Discussionmentioning

confidence: 99%

Genomic selection for resistance to mammalian bark stripping and associated chemical compounds in radiata pine

Nantongo

Potts

Klápště

et al. 2022

G3 Genes|Genomes|Genetics

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The integration of genomic data into genetic evaluations can facilitate the rapid selection of superior genotypes and accelerate the breeding cycle in trees. In this study, 390 trees from 74 control-pollinated families were genotyped using a 36K Axiom SNP array. A total of 15,624 high-quality SNPs were used to develop genomic prediction models for mammalian bark stripping, tree height and selected primary and secondary chemical compounds in the bark. Genetic parameters from different genomic prediction methods—single-trait best linear unbiased prediction based on a marker-based relationship matrix (GBLUP), multi-trait single-step GBLUP which integrated the marker-based and pedigree-based relationship matrices (ssGBLUP) and the single-trait generalised ridge regression (GRR) - were compared to equivalent single- or multi-trait pedigree-based approaches (ABLUP). The influence of the statistical distribution of data on the genetic parameters was assessed. Results indicated that the heritability estimates were increased nearly 2-fold with genomic models compared to the equivalent pedigree-based models. Predictive accuracy of the ssGBLUP was higher than the ABLUP for most traits. Allowing for heterogeneity in marker effects through the use of GRR did not markedly improve predictive ability over GBLUP, arguing that most of the chemical traits are modulated by many genes with small effects. Overall, the traits with low pedigree-based heritability benefited more from genomic models compared to the traits with high pedigree-based heritability. There was no evidence that data skewness or presence of outliers affected the genomic or pedigree-based genetic estimates.

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“…For this reason, clonal forestry offers prospects for propagating selected genotypes by tissue culture. Sequoia has been grown out of its endemic region with varying degrees of success in different parts of the world, including France, Germany, Spain, United Kingdom, Turkey, Chile, South Africa, and New Zealand (Kuser et al, 1995;Meason et al, 2016;Klápštĕ et al, 2020).…”

Section: Coast Redwood (Sequoia Sempervirens)mentioning

confidence: 99%

Fate of forest tree biotechnology facing climate change

Ahuja

2021

Silvae Genetica

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Woody plants have been cultured in vitro since the 1930s. After that time much progress has been made in the culture of tissues, organs, cells, and protoplasts in tree species. Tree biotechnology has been making strides in clonal propagation by organogenesis and somatic embryogenesis. These regeneration studies have paved the way for gene transfer in forest trees. Transgenics from a number of forest tree species carrying a variety of recombinant genes that code for herbicide tolerance, pest resistance, lignin modification, increased woody bio-mass, and flowering control have been produced by Agrobacterium-mediated and biolistic methods, and some of them are undergoing confined field trials. Although relatively stable transgenic clones have been produced by genetic transformation in trees using organogenesis or somatic embryogenesis, there were also unintended unstable genetic events. In order to overcome the problems of randomness of transgene integration and instability reported in Agrobacterium-mediated or biolistically transformed plants, site-specific transgene insertion strategies involving clustered regularly interspaced short palindromic repeats (CRISPR-Cas9) platform offer prospects for precise genome editing in plants. Nevertheless, it is important to monitor phenotypic and genetic stability of clonal material, not just under greenhouse conditions, but also under natural field conditions. Genetically modified poplars have been commercialized in China, and eucalypts and loblolly pine are expected to be released for commercial deployment in USA. Clonal forestry and transgenic forestry have to cope with rapid global climate changes in the future. Climate change is impacting species distributions and is a significant threat to biodiversity. Therefore, it is important to deploy Strategies that will assist the survival and evolution of forest tree species facing rapid climate change. Assisted migration (managed relocation) and biotechnological approaches offer prospects for adaptation of forest trees to climate change.

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Genotype-by-environment interaction in coast redwood outside natural distribution - search for environmental cues

Cited by 8 publications

References 57 publications

Origin and genetic nature of polyploidy in paleoendemic coast redwood (Sequoia sempervirens(D. Don) Endl.)

Origin and genetic nature of polyploidy in paleoendemic coast redwood (Sequoia sempervirens(D. Don) Endl.)

Genomic selection for resistance to mammalian bark stripping and associated chemical compounds in radiata pine

Fate of forest tree biotechnology facing climate change

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