期刊
GENES & GENETIC SYSTEMS
卷 94, 期 4, 页码 167-176出版社
GENETICS SOC JAPAN
DOI: 10.1266/ggs.19-00010
关键词
Brassica rapa; laser microdissection; RNA sequencing; self-compatibility
资金
- MEXT KAKENHI [16H06467, 16H06470, 16H06464, 16K21727]
- JSPS KAKENHI [161106380, 17K15208, 16H05066, 16H04854, 16K15085, 17H00821, 18KT0048]
- JSPS Bilateral Programs [18032211-000481]
- Golden Seed Project, MAFRA, MOF, RDA, KFS, Republic of Korea [213006-05-1-SB110]
- Japan Advanced Plant Science Network
- Grants-in-Aid for Scientific Research [17K15208, 16H05066, 16H06470, 16K15085, 18KT0048, 17H00821, 16H04854] Funding Source: KAKEN
Self-incompatibility (SI) is a sophisticated system for pollen selectivity to prevent pollination by genetically identical pollen. In Brassica, it is genetically controlled by a single, highly polymorphic S-locus, and the male and female S-determinant factors have been identified as S-locus protein 11 (SP11)/S-locus cysteine-rich protein (SCR) and S-locus receptor kinase (SRK), respectively. However, the overall molecular system and identity of factors in the downstream cascade of the SI reaction remain unclear. Previously, we identified a self-compatible B. rapa mutant line, TSC28, which has a disruption in an unidentified novel factor of the SI signaling cascade. Here, in a genetic analysis of TSC28, using an F2 population from a cross with the reference B. rapa SI line Chiifu-401, the causal gene was mapped to a genetic region of DNA containing markers BrSA64 and ACMP297 in B. rapa chromosome Al. By fine mapping using an F2 population of 1,034 plants, it was narrowed down to a genetic region between DNA markers ACMP297 and BrgMS4028, with physical length approximately 1.01 Mbp. In this genomic region, 113 genes are known to be located and, among these, we identified 55 genes that were expressed in the papilla cells. These are candidates for the gene responsible for the disruption of SI in TSC28. This list of candidate genes will contribute to the discovery of a novel downstream factor in the SP11 SRK signaling cascade in the Brassica SI system.
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