ACTA AGRICULTURAE BOREALI-SINICA ›› 2021, Vol. 36 ›› Issue (1): 18-26. doi: 10.7668/hbnxb.20191325

Special Issue: Potato crops

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

Genetic Diversity Analysis of Sweet Potato and Its Wild Species Using SCoT Molecular Markers

FENG Junyan1,2, KANG Le1, LANG Tao2, ZHANG Cong2, LI Ming2, ZHAO Shan3, PU Zhigang2   

  1. 1. College of Environmental Science and Engineering, China West Normal University, Nanchong 637002, China;
    2. Institute of Biotechnology and Nuclear Technology, Sichuan Academy of Agricultural Sciences, Chengdu 610061, China;
    3. Center of Analysis and Testing, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China
  • Received:2020-09-21 Published:2021-02-28

Abstract: In order to reveal the genetic diversity of sweet potato and its wild species and analyze the genetic relationship between sweet potato and its wild species, SCoT molecular markers were used to analyze the results of PCR amplification, genetic diversity, evolutionary relationship and population structure of 22 germplasm of sweetpotato and its wild species I.trifida and I.triloba in the present study. The results showed that 278 stable bands were detected by 43 primers, 4-12 bands could be detected by each primer, and five primers with rich polymorphism were screened, which were SCoT-8, SCoT-20, SCoT-26, SCoT-36 and SCoT-35. These primers could be used in the study of sweet potato molecular markers in the future. The analysis of genetic diversity based on the results of molecular markers showed that the highest genetic diversity was in I.trifida, followed by I.batatas, and the lowest in I.triloba. According to the results of genetic cluster analysis and population genetic structure analysis, 22 germplasm were divided into three groups, and the classification of each group was basically the same as its species. There was less blood exchange between different species, and the genetic composition was relatively simple. In comparison, the blood exchange between sweet potato and I.trifida was more than that between I.triloba. In conclusion, the results of this study preliminarily proved the potential application of SCoT molecular markers in the study of sweet potato evolution, and revealed the different genetic relationships between sweet potato and its wild relatives, which provided theoretical support for introducing I. trifida and other wild species into sweet potato breeding to improve the genetic diversity of sweet potato in the future.

Key words: Sweet potato, SCoT molecular markers, Genetic diversity, Genetic structure

CLC Number: 

Cite this article

FENG Junyan, KANG Le, LANG Tao, ZHANG Cong, LI Ming, ZHAO Shan, PU Zhigang. Genetic Diversity Analysis of Sweet Potato and Its Wild Species Using SCoT Molecular Markers[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2021, 36(1): 18-26. doi: 10.7668/hbnxb.20191325.

share this article