Hybrid larch heterosis: for which traits and under which genetic control?
| Autor: | Facundo Muñoz, Luc E. Pâques, Alexandre Marchal, Leopoldo Sanchez, Frédéric Millier |
|---|---|
| Přispěvatelé: | Unité de recherche Amélioration, Génétique et Physiologie Forestières (AGPF), Institut National de la Recherche Agronomique (INRA), Unité de recherche Amélioration, Génétique et Physiologie Forestières (UAGPF) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine [SDV.BIO]Life Sciences [q-bio]/Biotechnology Heterosis multi-site progeny test Bayesian inference 01 natural sciences Vigueur hybride F30 - Génétique et amélioration des plantes Diallel cross mélèze larch propriété du bois larix decidua Vegetal Biology mélèze hybride biology Forestry wood density inférence bayésienne european larch (tree) Amélioration par hétérosis hétérosis Épreuve sur la descendance densité du bois essai multisite growth Bayesian mcmc Biotechnologies Horticulture 03 medical and health sciences inter-specific hybrid croisement diallèle larix kaempferi Botany Genetic model programme d'amélioration Genetics [SDV.BV]Life Sciences [q-bio]/Vegetal Biology Larix eurolepis diallel mating design multi-trait model Molecular Biology U10 - Méthodes mathématiques et statistiques larix kaempferi x larix decidua test de descendance Quantitative genetics 15. Life on land Heritability biology.organism_classification croissance Larix leptolepis 030104 developmental biology Agronomy Théorie bayésienne hybride interspécifique Larch Biologie végétale contrôle génétique 010606 plant biology & botany |
| Zdroj: | Tree Genetics and Genomes Tree Genetics and Genomes, Springer Verlag, 2017, 13 (5), 17 p. ⟨10.1007/s11295-017-1177-1⟩ Tree Genetics and Genomes 5 (13), 17 p.. (2017) |
| ISSN: | 1614-2942 1614-2950 |
| DOI: | 10.1007/s11295-017-1177-1⟩ |
| Popis: | Despite the interest foresters have for inter-specific 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 nine EL and nine JL, set up in three contrasted sites. Growth traits (height, circumference), quality traits (wood density, stem form, heartwood proportion), and bud flush 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 fitted a multi-trait, Bayesian MCMC (Markov chain Monte Carlo) genetic model. Our study confirmed, 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 flush and stem flexuosity 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. |
| Databáze: | OpenAIRE |
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