期刊
GENOME
卷 53, 期 4, 页码 257-265出版社
CANADIAN SCIENCE PUBLISHING
DOI: 10.1139/G10-001
关键词
Brassica rapa L.; level of self-incompatibility; F-1 seed production; QTL; SSR
资金
- Japan Society for the Promotion of Science [18780007]
- Program of Basic Research Activities for Innovative Biosciences (PROBRAIN)
- Grants-in-Aid for Scientific Research [18780007] Funding Source: KAKEN
The level of self-incompatibility (SI) is important to the purity of F-1 seeds produced using the SI system of Brassica vegetables. To analyze the genetic basis of the level of SI, we generated an F-2 population derived from a cross between a turnip inbred line showing a high level of SI and a Chinese cabbage inbred line showing a low level, and evaluated the level of SI under insect pollination in two years. We constructed a detailed linkage map of Brassica rapa from the F-2 progeny, consisting of SSR, SNP, indel, and CAPS loci segregating into 10 linkage groups covering approximately 700 cM. Five quantitative trait loci (QTL) for high-level SI were identified. The phenotypic variation explained by the QTL ranged between 7.2% and 23.8%. Two QTL were detected in both years. Mapping of SI-related genes revealed that these QTL were co-localized with SLG on R07 and MLPK on R03. This is the first report of QTL for high-level SI evaluated under insect pollination in a Brassica vegetable. Our results could be useful for the marker-assisted selection of parental lines with a stable SI.
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