Pollen viability and meiotic behaviour in intraspecific hybrids of Hydrangea aspera subsp. aspera Kawakami group x subsp. sargentiana
| Autor: | Laurent Crespel, Philippe Morel |
|---|---|
| Přispěvatelé: | Institut de Recherche en Horticulture et Semences (IRHS), Université d'Angers (UA)-Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, 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), AGROCAMPUS OUEST-Institut National de la Recherche Agronomique (INRA)-Université d'Angers (UA), AGROCAMPUS OUEST, 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)-Institut National de la Recherche Agronomique (INRA)-Université d'Angers (UA) |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
0106 biological sciences
Plant Science 2n pollen grain medicine.disease_cause 01 natural sciences 03 medical and health sciences Meiosis Microspore Hydrangea aspera Pollen Botany Genetics medicine [SDV.BV]Life Sciences [q-bio]/Vegetal Biology Telophase Metaphase first division restitution pollen diameter 030304 developmental biology Anaphase 0303 health sciences biology Chromosome abnormal chromosome distribution biology.organism_classification disoriented metaphase II spindles Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Plant Breeding Plant Breeding, 2014, 133 (4), pp.536-541. ⟨10.1111/pbr.12170⟩ |
| ISSN: | 1439-0523 |
| DOI: | 10.1111/pbr.12170⟩ |
| Popis: | Article de revue (Article scientifique dans une revue à comité de lecture); International audience; Pollen viability and male meiosis in intraspecific hybrids of Hydrangea aspera subsp.aspera Kawakami group (2n=2x=36) and subsp.sargentiana (2n=2x=34) were investigated. Although it had been assumed that they were sterile, pollen viability was observed; it varied from 2.5% to 12.1%. The production of gametes with different chromosome numbers was implied by the analysis of the dispersion of the diameter distribution of pollen grains. Analysis of male meiosis made it possible to identify the origins with two major categories of meiotic aberrations: abnormal chromosome distribution (early chromosome migration at metaphase, lagging chromosomes at anaphase, micronuclei at telophase), leading to the formation of unbalanced tetrads and/or ones with supernumerary microspores; and abnormal spindle orientation in metaphase II (tripolar, fused and parallel spindles), leading to the formation of dyads or triads. The mode of 2n pollen formation is of the First Division Restitution type. The high level of parental heterozygosity that is normally associated with them should facilitate the transfer of a polygenic trait in breeding programme. |
| Databáze: | OpenAIRE |
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