Effect of genotype by spacing interaction on radiata pine genetic parameters for height and diameter growth

Lin, Yuanzhen; Yang, Huixiao; Ivković, Miloš; Gapare, Washington J.; Matheson, A. C.; Wu, Harry X.

doi:10.1016/j.foreco.2013.05.015

Cited by 22 publications

(10 citation statements)

References 40 publications

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“…Some authors found a link between competition and depletion of heritability. Lin et al (2013) showed a depletion on breast-height diameter heritability at age 5 in Pinus radiata under competition induced by a high plantation density. Also at high plantation density, Bouvet et al (2003) observed a depletion of both BHC and height heritabilities in Eucalyptus hybrids.…”

Section: Heritabilitiesmentioning

confidence: 95%

Hybrid larch heterosis: for which traits and under which genetic control?

Marchal

Muñoz

Millier

et al. 2017

Tree Genetics & Genomes

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Despite the interest foresters have for interspecic hybrid trees, still little is known about their quantitative genetics. This is especially true for the hybrid (HL) between Larix decidua (EL) and L. kaempferi (JL). Long-term, well-designed, multi-site experiments are necessary to estimate the parameters required for HL breeding programs. This paper presents the results from a diallel mating trial between 9 EL and 9 JL, set up in 3 contrasted sites. Growth traits (height, circumference), quality traits (wood density, stem form, heartwood proportion), and bud ush were measured from plantation to up to 18 years after plantation. Wood density and heartwood proportion were assessed using increment cores. We did a spatial analysis to take into account environmental heterogeneity at the tree level, and we tted a multi-trait, Bayesian MCMC (Markov Chain Monte Carlo) genetic model. Our study conrmed, in most situations, that HL expressed heterosis over its best parent for growth traits taking advantage of an early faster growth, with no loss in wood density. However, growth traits showed low levels of heritability. On the other hand, bud ush and stem exuosity had high heritabilities, and wood density was clearly under JL control. Site-dependent heritabilities were expressed by EL. Additive genetic correlations were presented. The traits with high heritabilities showed high correlation between their performances in pure species and in hybridization, as well as high across-site correlations. The discussion focused on the interest of these genetic parameters for the hybrid larch breeding programs.

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Section: Heritabilitiesmentioning

confidence: 95%

Hybrid larch heterosis: for which traits and under which genetic control?

Marchal

Muñoz

Millier

et al. 2017

Tree Genetics & Genomes

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“…To our knowledge, the drivers of heritability changes with age remain unclear. Competition among trees in common gardens might play a role in the expression of age-dependent heritabilities for diameter growth, but not for height in Pinus radiata (Lin et al 2013). Replicating our analysis in older trees would be interesting to further assess patterns of association between within-population genetic variation and environmental heterogeneity, and their underlying causes.…”

Section: Environmental Heterogeneity Is Not Associated With Higher Genetic Variationmentioning

confidence: 96%

Extreme climatic events but not environmental heterogeneity shape within-population genetic variation in maritime pine

Archambeau

Benito-Garzón

Miguel

et al. 2021

Preprint

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How evolutionary forces interact to maintain quantitative genetic variation within populations has been a matter of extensive theoretical debates. While mutation and migration increase genetic variation, natural selection and genetic drift are expected to deplete it. To date, levels of genetic variation observed in natural populations are hard to predict without accounting for other processes, such as balancing selection in heterogeneous environments. We aimed to empirically test three hypotheses: (i) admixed populations have higher quantitative genetic variation due to introgression from other gene pools, (ii) quantitative genetic variation is lower in populations from harsher environments (i.e. experiencing stronger selection), and (iii) quantitative genetic variation is higher in populations from spatially heterogeneous environments. We used phenotypic measurements of five growth, phenological and functional traits from three clonal common gardens, consisting of 523 clones from 33 populations of maritime pine (Pinus pinaster Aiton). Populations from harsher climates (mainly colder areas) showed lower genetic variation for height in the three common gardens. Surprisingly, we did not find any association between within-population genetic variation and environmental heterogeneity or population admixture for any trait. Our results suggest a predominant role of natural selection in driving within-population genetic variation, and therefore indirectly their adaptive potential.

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“…The RC interactions among genotypes that result from differing silvicultural regimes are generally thought to be minor (Waghorn et al 2007;Laserre et al 2009;Lin et al 2013Lin et al , 2014. However, there are doubtless effects like control of foliage diseases being able to alter genotypic rankings on sites of high disease hazard or correction of P deficiency affecting rankings.…”

Section: Genotype × Silviculturementioning

confidence: 99%

Genotype × site × silviculture interactions in radiata pine: knowledge, working hypotheses and pointers for research§

Burdon

Suontama

et al. 2017

N.Z. j. of For. Sci.

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Background: Favourable interactions between genotype, site and silviculture are desired for growing radiata pine, site and silviculture being two components of environment. Our challenge is to characterise the interactions so as to exploit them to advantage. Four classes of interaction are involved: three first-order interactions between pairs of factors; and one second-order interaction involving all three factors. Also of interest is to partition the interactions into two types: involving rank change of genotypes (RC interaction) and differing level of expression of genotypic differences among environments (LoE interaction). Key issues: Tree breeders' immediate concern is with main effects of environment and interaction effects on genotypes' performance, yet prime interest for research and policy decisions lies in the role of environments and specific environmental factors in generating interactions. Of the two types of interaction, RC seems generally more important for breeding operations with LoE more so for deployment decisions.

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Effect of genotype by spacing interaction on radiata pine genetic parameters for height and diameter growth

Cited by 22 publications

References 40 publications

Hybrid larch heterosis: for which traits and under which genetic control?

Hybrid larch heterosis: for which traits and under which genetic control?

Extreme climatic events but not environmental heterogeneity shape within-population genetic variation in maritime pine

Genotype × site × silviculture interactions in radiata pine: knowledge, working hypotheses and pointers for research§

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