Determination of Cytoplasmic Male Sterile Factors in Onion Plants (Allium cepa L.) Using PCR-RFLP and SNP Markers

  • Cho, Kwang-Soo (National Institute of Highland Agriculture, Rural Development Administration) ;
  • Yang, Tae-Jin (National Institute of Agricultural Biotechnology, Rural Development Administration) ;
  • Hong, Su-Young (National Institute of Highland Agriculture, Rural Development Administration) ;
  • Kwon, Young-Seok (National Institute of Highland Agriculture, Rural Development Administration) ;
  • Woo, Jong-Gyu (National Horticultural Research Institute, Rural Development Administration) ;
  • Park, Hyo-Guen (School of Plant Science, Seoul National University)
  • Received : 2006.03.06
  • Accepted : 2006.04.22
  • Published : 2006.06.30


We have developed a polymerase chain reactionrestriction fragment length polymorphism (PCR-RFLP) marker that can distinguish male-fertile (N) and male-sterile (S) cytoplasm in onions. The PCR-RFLP marker was located in a chloroplast psbA gene amplicon. Digesting the amplicons from different cytoplasm-containing varieties with the restriction enzyme MspI revealed that N-cytoplasm plants have a functional MspI site (CCGG), whereas the S-cytoplasm plants has a substitution in that site (CTGG), and thus no MspI target. The results obtained using this PCR-RFLP marker to distinguish between cytoplasmic male sterile factors in 35 onion varieties corresponded with those using a CMS-specific sequence-characterized amplified region (SCAR) marker. Moreover, the PCR-RFLP marker can identify N- ot S-cytoplasms in DNA sample mixtures in which they are in up to a 10-fold minority, indicating that use of the marker has high diagnostic precision. We also demonstrated the usefulness of the SNP detected in the psbA gene for high-throughput discrimination of CMS factors using Real-time PCR and a TaqMan probe assay.


Cytoplasmic Male Sterility (CMS);Marker-assisted Breeding (MAB);PCR-RFLP;Real-Time PCR;Sequence Characterized Amplified Region (SCAR) Marker


Supported by : Ministry of Agriculture and Forestry, National Institute of Highland Agriculture


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