Is Dwarfing in Pear Rootstocks Due to Aneuploid Genetic Structures?
| Autor: | D. Demilly, B. Billy, F. Daguin, M. H. Simard, D. Honoré, R. Guisnel |
|---|---|
| Přispěvatelé: | Génétique et Horticulture (GenHort), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, SNES, Groupement d'Intérêt Public 'Groupe d'Etudes et de Contrôle des Variétés et des Semences' ( GIP GEVES), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), International Society for Horticultural Science (ISHS). INT. |
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
0106 biological sciences
Germplasm [SDV.SA]Life Sciences [q-bio]/Agricultural sciences Aneuploidy Horticulture Biology 01 natural sciences Pyrus 03 medical and health sciences Botany medicine cytogenetic structure plant breeding [SDV.BV]Life Sciences [q-bio]/Vegetal Biology aneuploidy 030304 developmental biology Hybrid pear rootstocks phénotype cellulaire 0303 health sciences PEAR dwarfing pyriam food and beverages rootstock medicine.disease Dwarfing [SDV.BV.PEP]Life Sciences [q-bio]/Vegetal Biology/Phytopathology and phytopharmacy body regions porte greffe [SDV.BDD.EO]Life Sciences [q-bio]/Development Biology/Embryology and Organogenesis Genetic structure étude génétique Ploidy Rootstock 010606 plant biology & botany amélioration des plantes |
| Zdroj: | Proceedings of the 11th International Pear Symposium 11. International Pear Symposium 11. International Pear Symposium, Nov 2010, NA, Argentina 11. International Pear Symposium, International Society for Horticultural Science (ISHS). INT., Nov 2010, NA, Argentina |
| Popis: | The INRA pear rootstock breeding programme is dealing with interspecific hybridization between the INRA pear rootstock 'Pyriam' as female and Pyrus species as male parents in order to introduce new agronomic traits. INRA Pyrus species germplasm contains a large range of phenotypes and the pear rootstock breeding programmes have led to a wide range of dwarfing to vigorous selections. Cytogenetic characterization, done by flow cytometry, has shown that the analyzed Pyrus species are diploids as well as the released rootstocks. It has also shown that the group of perry pears, belonging to the P. nivalis species, contains diploid and triploid genotypes. As P. nivalis dwarfing rootstocks selections are aneuploids, further investigations by evaluation of the total DNA content and chromosome number counting have been done. The results demonstrate that dwarfing in Pyrus is linked with an aneuploid structure found in hybrids between a P. nivalis triploid genotype and a Pyrus species diploid one. |
| Databáze: | OpenAIRE |
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