Intra-specific Polyploidy and Possible Occurrence of Some Genetic Types for Pollen Development in Cayratia japonica, Vitaceae.

• OKADA HIROSHI

  Botanical Gardens, Faculty of Science, Osaka City University

• TSUKAYA HIROKAZU

  National Institute for Basic Biology Center for Integrative Bioscience

• OKAMOTO MOTOHARU

  Osaka Museum of Natural History

Abstract

Cayratia japonica showed intra-specific polyploidy of x=20, i.e., 2n=40 (diploid) and 60 (triploid). Individuals with 2n=40 produced fruits, and formed 20 bivalents at metaphase I in meiosis, but their pollen fertilities widely varied from about 30 to 90%. Individuals with 2n=60 did not produce any fruits, formed a variable number of trivalents, bivalents and univalents at metaphase I, and showed low pollen fertilities of less than 30%. The possible occurrence of some genetic types for pollen development in diploids is discussed.

Journal

• Acta phytotaxonomica et geobotanica

  Acta phytotaxonomica et geobotanica 54 (1), 69-75, 2003

  The Japanese Society for Plant Systematics

Keywords

• Cayratia japonica
• chromosome
• meiosis
• ploidy
• pollen development
• pollen fertility
• Vitaceae

Details

• CRID: 1390282680247071488
• NII Article ID: 110006318616
• NII Book ID: AA11586265
• DOI: 10.18942/apg.kj00004623207
• ISSN: 21897042
• ISSN: 13467565
• Text Lang: en
• Data Source:
  • JaLC
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed