Investigation of native habitats and genetic diversity based on the analysis of herbarium specimens in Lonicera caerulea

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K06028
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 39030:Horticultural science-related
• Research Institution: Hokkaido University
• Principal Investigator: Hoshino Yoichiro 北海道大学, 北方生物圏フィールド科学センター, 教授 (50301875)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: ハスカップ / 倍数性

Outline of Final Research Achievements

The fruits of haskap (Lonicera caerulea) are used as one of the berry crops. The genetic resources of haskap have been studied in Hokkaido. Diploid and tetraploid plants have been found in Hokkaido; however, their distribution patterns are still unknown. Therefore, the distribution patterns and ploidy levels of haskap were analyzed based on herbarium specimen information. As a result, new findings were obtained, such as the discovery of triploid plants in some populations comprising diploid and tetraploid plants. Additionally, various polyploid plants were produced, and their fertility were examined. After open pollination in these polyploid plants, progeny plants were obtained, showing various DNA contents. These data suggested the factors affecting the genetic diversity in the natural habitats of haskap.

Free Research Field

園芸学

Academic Significance and Societal Importance of the Research Achievements

ハスカップは北海道に自生する植物で、その果実はベリー類の一つして営利栽培されている。ハスカップの野生植物遺伝資源は、今後の品種改良のために重要なものであるが、開発等によりその自生地は減少している。本研究では、ハスカップの二倍体と四倍体の分布状況の詳細な情報に加え、自生地において三倍体が生み出されていることを明らかにした。本課題の研究成果は、ハスカップの野生遺伝資源の保全を行う上で有用な情報を提供するものである。