Variation in constitutive and induced chemistry in the needles, bark and roots of young Pinus radiata trees

Nantongo, Judith Ssali; Potts, Brad M.; Davies, Noel W.; Fitzgerald, Hugh; Rodemann, Thomas; O’Reilly-Wapstra, Julianne M.

doi:10.1007/s00468-021-02209-5

Cited by 5 publications

(1 citation statement)

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“…The DCM extracts were analyzed by gas chromatography–mass spectrometry (GC-MS) while the acetone extracts and sugars were analyzed by ultra-high-performance liquid chromatography–mass spectrometry (UHPLC-MS). The procedures for the GC-MS and UHPLC-MS are detailed in Nantongo et al (2021b) . For the NIRS analysis, samples were scanned when fresh and when freeze-dried and ground according to the methods in Nantongo, Potts, Rodemann, et al (2021a) .…”

Section: Methodsmentioning

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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Section: Methodsmentioning

confidence: 99%