Red alder - Frankia symbiosis

Red alder (Alnus rubra Bong.), has significant economic importance, yet is an orphan in terms of scientific understanding of its genetic variability and its relationship with its nitrogen-fixing symbiont Frankia alni. We are developing an omics-based research foundation upon which
 to base a breeding and improvement program, aimed at further improving tolerance to abiotic stresses and increasing marginal land area devoted to its growth. We aim to
 develop insights into interactions among tree genotype, rhizosphere microbiome, root transcriptome, symbiont (and other endophyte) transcriptomes, and soil characteristics during
 a seasonal cycle on good and marginal soil types. Objectives: 1. Create a de novo genome reference assembly of an elite red alder clone that outperforms all other known clones.
 2. Create reference genome sequences and epigenomic signatures of the five Frankia strains that result in the best tree performance and symbiosis.
3. Develop a dense set of molecular markers to enable accelerated predictive breeding and improvement. 4. Develop insights into interactions among tree genotype, rhizosphere microbiome, root transcriptome, symbiont (and other endophyte) transcriptomes, and their impacts on juvenile tree growth on good and marginal soils. Methods: 1. PacBio sequencing. De novo assembly and physical map integration. 2. PacBio sequencing with epigenetic modifications determined using the SMRTanalysis suite. 3. Genotyping by sequencing of 350 tree lines using the TASSEL-GBS pipeline. 4. 16s rRNA survey of rhizosphere microbial communities in the field and under experimental conditions. Root and nodule RNA
seq (tree roots and and their associated endophytes).

Publications

  • C. Bell, J. Sena, D. Fajardo, E. Lavelle, M. Costa, B. Herman, L. Davin, N. Lewis and A. Berry.
    A root nodule microbiome sequencing data set from red alder (Alnus rubra Bong.)
    Scientific Data, 11(1), 2024, DOI 10.1038/s41597-024-04131-0, PMID 39695182, PMCID PMC11655522
    Red alder genome 
  • K. Hixson, Q. Meng, S. Moinuddin, M. Kwon, M. Costa, J. Cort, L. Davin, C. Bell and N. Lewis.
    RNA-seq and metabolomic analyses of beneficial plant phenol biochemical pathways in red alder
    Frontiers in Plant Science, 15, 2024, DOI 10.3389/fpls.2024.1349635, PMID 39574452, PMCID PMC11578710
    Red alder genome 
  • K. Hixson, D. Fajardo, N. Devitt, J. Sena, M. Costa, Q. Meng, C. Boschiero, P. Zhao, E. Baack, V. Paurus, L. Davin, N. Lewis and C. Bell.
    Annotated genome sequence of a fast-growing diploid clone of red alder (<i>Alnus rubra</i> Bong.)
    G3: Genes, Genomes, Genetics, 13(6), 2023, DOI 10.1093/g3journal/jkad060, PMID 36966434, PMCID PMC10234377
    Red alder genome 
  • C. Bell, J. Sena, I. Gifford and A. Berry.
    Contiguous Genome Sequence of Frankia sp. Strain ArI3, Isolated from Root Nodules of Alnus rubra Bong
    Microbiology Resource Announcements, 10(43), e00800--21, 2021, DOI 10.1128/MRA.00800-21, PMID 34709056
    Red alder genome 

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