Populus tremuloides) was assured to be able to frequently spontaneously form diploid ovules by the SDR mechanism. The transferred average heterozygosity in FDR gametes was assessed to be remarkably higher than that in SDR gametes. However, a selective inducement to favour FDR gametes seems not to be feasible with the current thermo-treatment techniques." />
FDR and SDR processes in meiosis and diploid gamete formation in poplars (Populus L.) detected by centromere-associated microsatellite markers
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  • 作者:Heike Liesebach (1)
    Kristina Ulrich (2)
    Dietrich Ewald (2)
  • 关键词:Populus sp. ; Triploid ; Unreduced gametes ; Microsatellite markers ; Heterozygosity ; Poplar breeding
  • 刊名:Tree Genetics & Genomes
  • 出版年:2015
  • 出版时间:February 2015
  • 年:2015
  • 卷:11
  • 期:1
  • 全文大小:450 KB
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    8. Dong C-B, Suo Y-J, Kang X-Y (2014) Assessment of the genetic composition of triploid hybrid / Populus using SSR markers with low recombination frequencies. Can J Forest Res:692-99 doi: 10.1139/cjfr-2013-0360
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    11. Ewald D, Ulrich K (2012) In vitro pollination in poplar of section / Populus. Plant Cell Tiss Organ Cult 111:255-58. doi:10.1007/s11240-012-0189-7 CrossRef
    12. Ewald D, Ulrich K, Naujoks G, Schr?der MB (2009) Induction of tetraploid poplar and black locust plants using colchicine: chloroplast number as an early marker for selecting polyploids in vitro. Plant Cell Tiss Organ Cult 99:353-57. doi:10.1007/s11240-009-9601-3 CrossRef
    13. Ewald D, Ulrich K, Liesebach H (2012) Erzeugung triploider Individuen und intersektioneller Hybriden bei verschiedenen Pappelarten. In: Züchtung und Ertragsleistung schnellwachsender Baumarten im Kurzumtrieb - Erkenntnisse aus drei Jahren FastWOOD, ProLoc und Weidenzüchtung, Hann. Münden. Beitr?ge aus der Nordwestdeutschen Forstlichen Versuchsanstalt, pp 183-93
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  • 作者单位:Heike Liesebach (1)
    Kristina Ulrich (2)
    Dietrich Ewald (2)

    1. Thünen Institute of Forest Genetics, German Federal Research Institute for Rural Areas, Forestry and Fisheries, Sieker Landstrasse 2, 22927, Grosshansdorf, Germany
    2. Thünen Institute of Forest Genetics, German Federal Research Institute for Rural Areas, Forestry and Fisheries, Eberswalder Chaussee 3A, 15377, Waldsieversdorf, Germany
  • ISSN:1614-2950
文摘
Sexual polyploidisation is one of the appropriate approaches in poplar breeding. Controlled pollinations were carried out with spontaneously formed, as well as induced, 2n gametes. Among the offspring individuals, 36 triploid plants and 1 tetraploid individual were detected by flow cytometry. The parental clones and all polyploid offspring individuals were genotyped by 18 nuclear microsatellite markers. The allelic configurations, especially tri-allelic patterns, and dosage effects were used to recognise diploid contributions of the male or female gamete. Three out of 18 markers localised near the centromeres of linkage groups I, X and XV. They are assumed to be unaffected by crossing over events and, therefore, able to ascertain the mechanism of first division restitution (FDR) or second division restitution (SDR) to generate diploid gametes. The applied three unlinked centromere-associated microsatellite markers allow a very effective determination of FDR resp. SDR processes. Altogether, 21 diploid pollen (10 FDR and 11 SDR) and 13 diploid ovules (1 FDR and 12 SDR) as well as 2 cases of postmeiotic reconstitution were determined with no inconsistency for the three markers. A female hybrid aspen clone (Populus tremula?×-em class="a-plus-plus">Populus tremuloides) was assured to be able to frequently spontaneously form diploid ovules by the SDR mechanism. The transferred average heterozygosity in FDR gametes was assessed to be remarkably higher than that in SDR gametes. However, a selective inducement to favour FDR gametes seems not to be feasible with the current thermo-treatment techniques.

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