A study of genetic and physical factors related to texture in Mizunasu (Solanum melongena L.) characterized by its juiciness and mouthfeel

2020 Fiscal Year Final Research Report

• Project/Area Number: 19K15838
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 39030:Horticultural science-related
• Research Institution: Research Institute of Environment, Agriculture and Fisheries, Osaka Prefecture
• Principal Investigator: Segami Shuhei 地方独立行政法人大阪府立環境農林水産総合研究所(環境研究部、食と農の研究部及び水産研究部), その他部局等, 研究員 (10781156)
• Project Period (FY): 2019-04-01 – 2021-03-31
• Keywords: ナス / 水ナス / 果実形質 / 遺伝学 / テクスチャ

Outline of Final Research Achievements

In order to obtain knowledge on the fruit characteristics of Mizunasu, which is characterized by its high juiciness and crisp texture, we conducted research using the cross-fertilized generation. Genetic analysis using the F2 generation identified single or multiple loci related to high juiciness, flesh and pericarp firmness, and fruit specific gravity. In particular, the locus on chromosome 9 was detected in all traits and was considered to be an important locus. Further detailed genetic analysis showed that the candidate region for the locus was about 1.4 Mb. As for mouthfeel, analysis of the F3 generation showed that in addition to the loci found in F2, other new loci might be involved. No correlation was found between flesh cell structure and juiciness, or between arginine content and, which was considered to be higher in Mizunasu than in other varieties, and high juiciness.

Free Research Field

植物遺伝育種学

Academic Significance and Societal Importance of the Research Achievements

ナスにおいて、食味にも深く関わる多汁性をはじめとした果実特性を決定する遺伝子座の特定は、これまでにない成果であり、学術的に重要な成果である。また、水ナスの品種育成やナスの果実物性を育種的に改良する際に、本研究成果で得られた知見が利用でき、社会的な意義も大きい。