A tetraploid hybrid plant from 4x × 2x crosses in Vitis and its origin

Sung Min Park, Akira Wakana, Michikazu Hiramatsu, Kenji Uresino

研究成果: ジャーナルへの寄稿記事

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To study the origin of unreduced (2n) gametes in diploid Vitis cultivars, we surveyed the occurrence of tetraploid hybrid seedlings from 40 interploid crosses with five tetraploid and seven diploid cultivars. A total of 250 seedlings from the interploid crosses were established through embryo culture and by seed sowing. In 20 2x × 4x crosses, no tetraploid hybrid seedlings were derived from 8,902 pollinations. In 20 4x × 2x crosses, two tetraploid hybrid seedlings were obtained from 8,057 pollinations. Investigation of isozyme genotypes of the two tetraploid seedlings using three variable enzyme systems indicated that one of the two seedlings resulted from the union of a diploid egg with a 2n male gamete and that failure of second meiotic division resulted in the formation of the 2n male gamete. The percentage of giant pollen grains in 'Muscat Bailey A', a pollen parent of the tetraploid seedling, was relatively high (about 5.9%) and 10.9% of the giant pollen grains germinated on agar medium. These results suggested that 2n pollen of diploid cultivars are useful for breeding tetraploid grape.

元の言語英語
ページ(範囲)345-353
ページ数9
ジャーナルEuphytica
126
発行部数3
DOI
出版物ステータス出版済み - 10 10 2002

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All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science
  • Genetics
  • Plant Science
  • Horticulture

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