Formation of unfertilized small seeds with hard testa in triploid gape hybrids (Vitis complex) derived from crosses between diploid 'Muscat Bailey A' and tetraploid 'Red Pearl'

Akira Wakana, Hassan Sarikhani, Michikazu Hiramatsu, Nobuaki Hanada, Isao Fukudome

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

To improve the fruit quality in triploid grapes, the mechanism underlying formation of unfertilized small seeds with hard seed coat was investigated in berries of a large number of triploid hybrids obtained from reciprocal crosses between diploid 'Muscat Bailey A' and tetraploid 'Red Pearl'. In each triploid hybrid plant, ten flower clusters trimmed so that they have about 200 flowers each were open-pollinated, and another ten open-pollinated flower clusters trimmed similarly were immersed in a solution of GA 3 (100 mg/l) at the full bloom stage. Triploid hybrid plants that produced unfertilized small seeds were 8/18 plants for open-pollinated clusters and 21/68 plants for GA 3-treated clusters. The rate of unfertilized small seeds was different in different triploid hybrids, and the rates in each triploid plant showed small variation between two or three years examined. In GA 3-treated clusters, the rate of small hard seeds in each hybrid was dramatically decreased. These results indicated that the extent of unfertilized small seed formation is a triploid-plant-specific character and that the formation is highly suppressed by immersion treatment of the flower clusters with high concentration of GA 3 solution.

Original languageEnglish
Pages (from-to)607-614
Number of pages8
JournalJournal of the Faculty of Agriculture, Kyushu University
Volume50
Issue number2
Publication statusPublished - Oct 1 2005

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Agronomy and Crop Science

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