‘Bea-Kei’, a New Triploid Seedless Grape Cultivar Derived from a ‘Muscat Bailey A’ × ‘Kyoho’ Cross

DOI IR (HANDLE) Open Access
  • Wakana Akira
    Laboratory of Horticultural Science, Division of Agricultural Botany, Department of Plant Resources, Faculty of Agriculture, Kyushu University | Laboratory of Agricultural Ecology, Division of Agricultural Ecology, Department of Plant Resources, Faculty of Agriculture, Kyushu
  • Fukudome Isao
    Laboratory of Fruit Tree Science, University Farm, Faculty of Agriculture, Kyushu University
  • Hanada Nobuaki
    Laboratory of Fruit Tree Science, University Farm, Faculty of Agriculture, Kyushu University
  • Hiramatsu Michikazu
    Laboratory of Horticultural Science, Division of Agricultural Botany, Department of Plant Resources, Faculty of Agriculture, Kyushu University
  • Sakai Kaori
    Laboratory of Agricultural Ecology, Division of Agricultural Ecology, Department of Plant Resources, Faculty of Agriculture, Kyushu
  • Kajiwara Kohei
    Laboratory of Fruit Tree Science, University Farm, Faculty of Agriculture, Kyushu University

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Description

To breed a seedless grape cultivar that produces large-sized berries with labor saving, 201 triploid hybrid plants were firstly derived from 24 interploid crosses with seven diploid and six tetraploid cultivars. A triploid grape BK9101 derived from a ‘Muscat Bailey A’ × ‘Kyoho’ cross was finally selected and given a cultivar name ‘Bea-Kei’. ‘Bea-Kei’ showed high male and female sterility and produced small-sized seedless berries of about 2 g because of its low parthenocarpic ability. One time immersion treatment of the adequately thinned flower clusters with 100 ppm GA3 at around full bloom, however, resulted in the formation of large-sized black berries of 8-11 g that stuck together. The trees showed high vigor and productivity, and, thus, required summer pruning for vigor control and thinning of flower clusters and flowers for high quality berry production. However, once the flower cluster thinning was carried out so that the each of the clusters had about 70 flowers, fruit thinning was unnecessary because of ideal fruit set and growth rates after the GA3 treatment of the thinned flower clusters. The berries ripened from late August to early September in field conditions, and the berry quality did not deteriorate on trees by October. The berries were black-purple in rind color and contained high concentration of soluble solid sugars (19-21% in Brix). The rind of ‘Bea-Kei’ was not so slippery that the seed and pollen parents did. The flesh of ‘Bea-Kei’ was harder than the parents and showed superior taste than the parents. The estimation of the whole data obtained in this research led to the conclusion that ‘Bea-Kei’ has high potential as a new leading triploid cultivar that produces very high quality seedless berries with the aid of GA3 at full bloom.

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Details 詳細情報について

  • CRID
    1390853649615028096
  • NII Article ID
    120001036674
  • NII Book ID
    AA00247166
  • DOI
    10.5109/12852
  • HANDLE
    2324/12852
  • ISSN
    00236152
  • Text Lang
    en
  • Article Type
    departmental bulletin paper
  • Data Source
    • JaLC
    • IRDB
    • Crossref
    • CiNii Articles
    • OpenAIRE

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