2022 Fiscal Year Final Research Report
Geminivirus resistance in peppers and resistant breeding
Project/Area Number |
19H02950
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Review Section |
Basic Section 39030:Horticultural science-related
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Research Institution | Kindai University |
Principal Investigator |
Koeda Sota 近畿大学, 農学部, 准教授 (00629066)
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Project Period (FY) |
2019-04-01 – 2023-03-31
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Keywords | トウガラシ・ピーマン / ジェミニウイルス / ベゴモウイルス / ウイルス抵抗性 / 抵抗性育種 / ゲノム解析 / ナス科 / 抵抗性遺伝子 |
Outline of Final Research Achievements |
Pepper yellow leaf curl disease (PepYLCD) is caused by viruses belonging to the Begomovirus genus of the Geminiviridae family. Over the past three decades, PepYLCD have caused substantial yield losses in peppers in many tropical and subtropical regions of the world. However, breeding of resistance to begomovirus is much less advanced in pepper than in tomato, and as of yet, there are no commercial pepper cultivars carrying resistance to begomovirus infection. In this study, genetic mapping of begomovirus resistance genes were conducted. Our study revealed that begomovirus resistance of GR1 (Capsicum chinense) is controlled by QTL. On the other hand, fine-mapping clarified that the recessive resistance gene pepy-1 encodes Pelota in BaPep-5 (Capsicum annuum) and the dominant resistance gene Pepy-2 encodes RNA dependent RNA polymerase (RDR) in PG1-1 (C. annuum). This is the first study to identify begomovirus resistance gene in peppers.
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Free Research Field |
園芸学、植物育種学、植物ウイルス学
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Academic Significance and Societal Importance of the Research Achievements |
本研究では複数のベゴモウイルス抵抗性トウガラシを解析し,2つの抵抗性遺伝子を単離し,QTLの存在も明らかにした.これはトマト以外の植物種における初めての抵抗性遺伝子単離であり,学術的新規性がある.また,異なる抵抗性遺伝子を単離できたことから,抵抗性育種においても品種の多様化が可能であり,さらに複数の抵抗性遺伝子を有することで,より強い抵抗性を持つ品種を開発できる可能性が期待される.
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