ACTA AGRICULTURAE BOREALI-SINICA ›› 2021, Vol. 36 ›› Issue (2): 40-45. doi: 10.7668/hbnxb.20191702

Special Issue: Melon

• Crop Genetics & Breeding·Germplasm Resources·Biotechnology • Previous Articles     Next Articles

QTL Analysis of Gummy Stem Blight in Melon by SALF-seq and BSA Technique

GAO Tianyi, HAO Fangmin, ZANG Quanyu, MA Erlei, HUANG Yunping, WANG Yuhong   

  1. Ningbo Academy of Agricultural Sciences, Ningbo 315040, China
  • Received:2020-12-01 Published:2021-04-28

Abstract: In order to investigate the resistant genes location of gummy stem blight(GSB) on chromosomes of melon, the resistance parent P181, susceptible parent P01 and F2 progeny were used for GSB resistance genes identification. According to the disease incidence of GSB of F2,two parents, 30 high-resistance and 30 high-suspect F2 generations were choice to isolated DNA, in order to construct resistant and susceptible pools. The QTL locations were applicated by SLAF-seq and BSA technique. A total of 188 022 SLAF-labels were obtained, after low-quality SNP sites filterted out, 5 676 high-quality SNP markers were developed. Two GSB-resistance QTLs were identified on chromosomes of melon by the methods of SNP-index, which were located in Chr01 and Chr04, with 1.19 Mb (on the region of 9 837 447-11 028 838 bp) and 0.86 Mb (on the region of 33 135 224-33 993 540 bp) interval, respectively. A total of 218 genes were analysis in QTLs. Furthermore, according to the gene function annotations, 15 candidate genes were speculated with the relationship of GSB resistance, including 1 gene of NBS-LRR, 5 genes of E3 ubiquitin-protein ligase, 1 gene of RPM1-interacting protein, 1 gene of zinc finger protein, 1 gene of NAC domain-containing protein, 2 genes of calcium-dependent protein kinase, 3 genes of L-type lectin-domain containing receptor kinase, 1 gene of RING-H2 finger protein. The results will support reference of the basis of resistance genes of GSB.

Key words: Melon, Gummy stem blight, Resistance genes, SLAF-seq, QTL

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Cite this article

GAO Tianyi, HAO Fangmin, ZANG Quanyu, MA Erlei, HUANG Yunping, WANG Yuhong. QTL Analysis of Gummy Stem Blight in Melon by SALF-seq and BSA Technique[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2021, 36(2): 40-45. doi: 10.7668/hbnxb.20191702.

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