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ACTA HORTICULTURAE SINICA ›› 2013, Vol. 40 ›› Issue (10): 1916-1927.

• Vegetables • Previous Articles     Next Articles

Establishment and Validation of SNP Genotyping System by CAPS Combining Melting Curve in Brassica campestris

LI Ping-xia1,2,HUANG Ying-jin1,LIU Bo2,LIANG Jian-li2,CHENG Feng2,WU Jian2,and WANG Xiao-wu2,*   

  1. (1College of Agronomy,Jiangxi Agricultural University,Nanchang 330045,China;2Institute of Vegetables and Flowers,Chinese Academy of Agricultural Sciences,Beijing 100081,China)
  • Received:2013-05-11 Online:2013-10-25 Published:2013-10-25

Abstract: Melting temperature(Tm)was different according to the different lengths or nucleotide sequences of DNA fragments. In this report,we established a novel single nucleotide polymorphism(SNP)genotyping system refered as CAPS-MC approach. The CAPS-MC approach combined cleaved amplified polymorphic sequence(CAPS)with melting curve(MC)analysis. By aligning whole genome re-sequencing data from two Brassica campestris accessions,‘L58’and‘ZCT095’,to the reference genome sequence of‘Chiifu-401-42’,a total of 719 HindⅢ endonuclease recognition nucleotide sequence SNP polymorphisms were converted to CAPS-MC markers. We established and optimized CAPS-MC system by randomly selecting 10 pairs of these markers. Our results clearly demonstrated that CAPS-MC approach was sensitive,accurate,rapid and inexpensive. Because the melting curve of 96 samples can be measured in 22 mins once,it is well suited for high-throughput genotyping.

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