Specific purity of hybrid larch Forest Reproductive Materials: how much does it matter?
International audience Since its discovery in Dunkeld (Scotland) at the beginning of the 20th century, hybrid larch (HL) (Larix x eurolepis) raised a strong interest among foresters and, later on, breeders. Dozens of hybridization orchards have been established in several European countries. All of...
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ftccsdartic:oai:HAL:hal-02597372v1 2023-05-15T16:52:51+02:00 Specific purity of hybrid larch Forest Reproductive Materials: how much does it matter? Importance du taux d'hybrides dans les Matériels Forestiers de Reproduction de mélèze hybride Philippe, Gwenaël Matz, S. Buret, Corinne Pâques, L.E. Ecosystèmes forestiers (UR EFNO) Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) Institut National de la Recherche Agronomique (INRA) Hallormsstadur, Iceland 2012-09-11 https://hal.inrae.fr/hal-02597372 en eng HAL CCSD hal-02597372 https://hal.inrae.fr/hal-02597372 IRSTEA: PUB00036057 Larix 2012: Larch in a warm climate, 8th international symposium of IUFRO Working Group S2.02.07 "Larch breeding and genetic resources" https://hal.inrae.fr/hal-02597372 Larix 2012: Larch in a warm climate, 8th international symposium of IUFRO Working Group S2.02.07 "Larch breeding and genetic resources", Sep 2012, Hallormsstadur, Iceland. pp.2 TAUX D'HYBRIDES PURETE SPECIFIQUE CROISSANCE MELEZE HYBRIDE EVALUATION VARIETALE [SDE]Environmental Sciences info:eu-repo/semantics/conferenceObject Conference papers 2012 ftccsdartic 2021-11-21T00:51:08Z International audience Since its discovery in Dunkeld (Scotland) at the beginning of the 20th century, hybrid larch (HL) (Larix x eurolepis) raised a strong interest among foresters and, later on, breeders. Dozens of hybridization orchards have been established in several European countries. All of them include selected genotypes of European Larch (EL) (Larix decidua Mill.) and Japanese larch (JL) (Larix kaempferi (Lamb.) Carr.) but they differ in the mother species (EL, JL, both), the number of clones used on both maternal and paternal sides (from one to several dozens) and in the planting design. However, the products of these seed orchards are composed of a mixture of hybrid and pure species seeds, the latter resulting from intraspecific crossings and/or self-pollination. Molecular markers show highly variable hybrid percentages among orchards but also, for a given orchard, among years. In addition to the number of mother clones, the proportion of hybrid seeds depends on several factors, e.g. clonal contributions to pollen and seed-cone production and flowering overlapping that are related to genetic factors, climatic conditions and seed orchard management (flower stimulation, supplemental mass pollination). Considering the extent of hybrid rate fluctuations (between 10% and 90%) it is important to study the effect of species purity on stand productivity and quality. The consequences are also discussed in the context of seed orchard testing. Our data have been mainly collected in two "twin" trials managed by Irstea that aimed at comparing seed lots from six European hybridization orchards (64 seedlings per plot x 4 blocks for each variety). They were planted in 1995 in two sites, at mid-elevation (800 and 1000 m). The first one is subjected to an oceanic climate favourable to JL whereas the second one, more continental, is more suitable to EL. Bedrock is granite in site 1 and limestone in site 2. Taxa were first identified (100-120 trees per variety) by INRA using markers based on cytoplasmic DNA. It ... Conference Object Iceland Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Carr ENVELOPE(130.717,130.717,-66.117,-66.117) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
TAUX D'HYBRIDES PURETE SPECIFIQUE CROISSANCE MELEZE HYBRIDE EVALUATION VARIETALE [SDE]Environmental Sciences |
spellingShingle |
TAUX D'HYBRIDES PURETE SPECIFIQUE CROISSANCE MELEZE HYBRIDE EVALUATION VARIETALE [SDE]Environmental Sciences Philippe, Gwenaël Matz, S. Buret, Corinne Pâques, L.E. Specific purity of hybrid larch Forest Reproductive Materials: how much does it matter? |
topic_facet |
TAUX D'HYBRIDES PURETE SPECIFIQUE CROISSANCE MELEZE HYBRIDE EVALUATION VARIETALE [SDE]Environmental Sciences |
description |
International audience Since its discovery in Dunkeld (Scotland) at the beginning of the 20th century, hybrid larch (HL) (Larix x eurolepis) raised a strong interest among foresters and, later on, breeders. Dozens of hybridization orchards have been established in several European countries. All of them include selected genotypes of European Larch (EL) (Larix decidua Mill.) and Japanese larch (JL) (Larix kaempferi (Lamb.) Carr.) but they differ in the mother species (EL, JL, both), the number of clones used on both maternal and paternal sides (from one to several dozens) and in the planting design. However, the products of these seed orchards are composed of a mixture of hybrid and pure species seeds, the latter resulting from intraspecific crossings and/or self-pollination. Molecular markers show highly variable hybrid percentages among orchards but also, for a given orchard, among years. In addition to the number of mother clones, the proportion of hybrid seeds depends on several factors, e.g. clonal contributions to pollen and seed-cone production and flowering overlapping that are related to genetic factors, climatic conditions and seed orchard management (flower stimulation, supplemental mass pollination). Considering the extent of hybrid rate fluctuations (between 10% and 90%) it is important to study the effect of species purity on stand productivity and quality. The consequences are also discussed in the context of seed orchard testing. Our data have been mainly collected in two "twin" trials managed by Irstea that aimed at comparing seed lots from six European hybridization orchards (64 seedlings per plot x 4 blocks for each variety). They were planted in 1995 in two sites, at mid-elevation (800 and 1000 m). The first one is subjected to an oceanic climate favourable to JL whereas the second one, more continental, is more suitable to EL. Bedrock is granite in site 1 and limestone in site 2. Taxa were first identified (100-120 trees per variety) by INRA using markers based on cytoplasmic DNA. It ... |
author2 |
Ecosystèmes forestiers (UR EFNO) Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) Institut National de la Recherche Agronomique (INRA) |
format |
Conference Object |
author |
Philippe, Gwenaël Matz, S. Buret, Corinne Pâques, L.E. |
author_facet |
Philippe, Gwenaël Matz, S. Buret, Corinne Pâques, L.E. |
author_sort |
Philippe, Gwenaël |
title |
Specific purity of hybrid larch Forest Reproductive Materials: how much does it matter? |
title_short |
Specific purity of hybrid larch Forest Reproductive Materials: how much does it matter? |
title_full |
Specific purity of hybrid larch Forest Reproductive Materials: how much does it matter? |
title_fullStr |
Specific purity of hybrid larch Forest Reproductive Materials: how much does it matter? |
title_full_unstemmed |
Specific purity of hybrid larch Forest Reproductive Materials: how much does it matter? |
title_sort |
specific purity of hybrid larch forest reproductive materials: how much does it matter? |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.inrae.fr/hal-02597372 |
op_coverage |
Hallormsstadur, Iceland |
long_lat |
ENVELOPE(130.717,130.717,-66.117,-66.117) |
geographic |
Carr |
geographic_facet |
Carr |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Larix 2012: Larch in a warm climate, 8th international symposium of IUFRO Working Group S2.02.07 "Larch breeding and genetic resources" https://hal.inrae.fr/hal-02597372 Larix 2012: Larch in a warm climate, 8th international symposium of IUFRO Working Group S2.02.07 "Larch breeding and genetic resources", Sep 2012, Hallormsstadur, Iceland. pp.2 |
op_relation |
hal-02597372 https://hal.inrae.fr/hal-02597372 IRSTEA: PUB00036057 |
_version_ |
1766043313612259328 |