Chloroplast and mitochondrial molecular tests identify European×Japanese larch hybrids

Acheré, Virginie; Rampant, Patricia Faivre; Pâques, Luc; Prat, D.

doi:10.1007/s00122-004-1595-y

Cited by 37 publications

(33 citation statements)

References 39 publications

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“…Due to the way seedlots were produced (open-pollination) and because of a more than frequent partial mismatching of flowering phenology between the two parental species in these orchards, progenies from hybridisation orchards usually represent mixtures of plants from the two to three taxa: hybrids, pure European larches and /or Japanese larches (ACHERÉ et al, 2002;ACHERÉ et al, 2004).…”

Section: Plant Materialsmentioning

confidence: 99%

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Growth Rhythm Parameters as Components of Hybrid Vigour in Young Seedlings of Hybrid Larch (Larix decidua x L. kaempferi)

Pâques¹

2009

Silvae Genetica

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Heterosis for growth traits was investigated on 2-yrold seedlings from related intra- and inter-specific progenies collected in hybridisation seed orchards combining Larix decidua (EL) and L. kaempferi (JL). Following taxa identification, seedlings phenology and growth were observed over a complete growing season in two experiments. Start, cessation, duration and rates of growth for the different taxa were explored in relation to hybrid vigour. Variable levels of heterosis were observed, depending on the genetic background of the parental species, the species over which superiority was evaluated, environmental conditions and the traits considered. While significant and consistent differences have been observed between hybrids and their related EL progenies for phenological growth traits, a better timing of the growth rhythm over the growing season together with a greater growth efficiency allowed for a consistently positive heterosis over EL. The situation appeared more complex with JL as heterosis could be either positive or negative. Besides the high variation in heterosis levels, the way heterosis for height built up over the growing season seemed also to be variable according to genetic backgrounds: cumulative constant superiority of the hybrid for growth rhythms along the growing season or greater growth rates during discrete periods of time.

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Section: Plant Materialsmentioning

confidence: 99%

“…Taxa of individual trees were identified from needles collected during summer-time with diagnostic cytoplasmic DNA markers developed by ACHERÉ et al (2004). Details can be found in PÂQUES et al (2006).…”

Section: Plant Materialsmentioning

confidence: 99%

Growth Rhythm Parameters as Components of Hybrid Vigour in Young Seedlings of Hybrid Larch (Larix decidua x L. kaempferi)

Pâques¹

2009

Silvae Genetica

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“…The scions of both species were harvested from clonal plantations as well as from trees selected during testing of descendants of first generation larch improvement programs. In 2004, the trees in the seed orchard were analysed using molecular markers (Acheré et al 2004, Gros-Louis et al 2005 to ensure the purity of both the EL and JL parent trees (clones).…”

Section: Plant Materials and Cultural Conditionsmentioning

confidence: 99%

“…However, the proportion of hybrid seeds is very variable. Seed lots produced in open-pollinated seed orchards tend to be a mix of hybrid and pure species seeds, depending on the parent tree from which they are harvested (Acheré et al 2004, Pâques et al 2006. Therefore, in order to guarantee high proportions of HL seeds in seed lots, it is necessary to resort to artificial pollination.…”

Section: Introductionmentioning

confidence: 99%

A novel approach for the operational production of hybrid larch seeds under northern climatic conditions

Colas¹,

Perron²,

Tousignant³

et al. 2008

The Forestry Chronicle

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Hybrid larch ([Larix ϫ marschlinsii Coaz], HL) is sought after by the forest industry because of its growth characteristics, excellent wood quality and disease resistance. However, the difficulty in obtaining HL seeds limits the production of seedlings for reforestation. Both European larch (Larix decidua Mill.) and Japanese larch (Larix kaempferi [Lamb.] Carrière) produce few seeds and the time lag in their flowering phenology complicates their natural pollination. We have developed a novel type of sheltered seed orchard, dedicated to the production of HL seeds from grafts grown in pots. Inverting the arches of a conventional tunnel provides a sturdy structure which is easy to maintain. Because of its height, the tunnel can accommodate the rapid growth of the trees, which reduces the need for pruning. The tunnels are covered in the winter and spring. In the winter, the covers prevent snow accumulation. In the spring, they create a "greenhouse effect" inside the tunnels, accelerating flower development, preventing pollen contamination from trees outside the tunnels and protecting the flowers from late spring frosts. Over the past five years, flowering has been regular and abundant. Bagging the crowns for pollen harvest is cost-effective and yields large quantities of high quality pollen. Pollination operations are conducted using an electrostatic pistol. Because of the large number of available clones, large quantities of seeds with a high genetic variability can be produced at a competitive cost. In 2006, this seed orchard concept was implemented operationally at the Berthier forest nursery (Québec, Canada).

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“…Many studies of hybrid identification and discrimination have been conducted; including studies of isoenzyme in pine (KOROL et al, 1995); RAPD markers in spruce (PERRON et al, 1995;NKONGOLO, 1999), larch (SCHEEPERS et al, 2000) and eucalyptus (DELAPORTE et al, 2001); simple sequence repeat (SSR) markers in poplar (BEKKAOUI et al, 2003;KHASA et al, 2005) and Acacia hybrid (NG et al, 2005); cytoplasmic DNA such as chloroplast DNA (cpDNA) in eucalyptus (MC KINNON et al, 2001); cpDNA, mitochondrial DNA (mtDNA) in larch (ACHERE et al, 2004); and cpDNA and nuclear DNA (nDNA) in poplar (HOLDE R - EGGER et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Diagnosis of interspecific hybrids between Acacia mangium and A. auriculiformis using single nucleotide polymorphism (SNP) markers

et al. 2011

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This paper describes a diagnostic system to verify interspecific hybrids between Acacia mangium and A. auriculiformis using single nucleotide polymorphism (SNP) markers. Forty-eight DNA fragments were selected based on random amplified polymorphic DNAs (RAPD) amplified across 48 individuals from each parental species, and were transformed into 44 sequence-characterized amplified region (SCAR) markers. Five SNP markers that generated species-specific alleles for each species were selected from the 28 sequenced SCARs. A multiplex single nucleotide primer extension (SNuPE) analyses of the five SNPs using 40 A. mangium, 40 A. auriculiformis and 16 Acacia hybrids showed high discrimination power. This diagnostic system, with high discriminatory ability, provides a highly reliable and fast method for identifying interspecific hybrids of A. mangium and A. auriculiformis.

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Chloroplast and mitochondrial molecular tests identify European×Japanese larch hybrids

Cited by 37 publications

References 39 publications

Growth Rhythm Parameters as Components of Hybrid Vigour in Young Seedlings of Hybrid Larch (Larix decidua x L. kaempferi)

Growth Rhythm Parameters as Components of Hybrid Vigour in Young Seedlings of Hybrid Larch (Larix decidua x L. kaempferi)

A novel approach for the operational production of hybrid larch seeds under northern climatic conditions

Diagnosis of interspecific hybrids between Acacia mangium and A. auriculiformis using single nucleotide polymorphism (SNP) markers

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