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Analysis of waxy maize germplasm resources in Southwest China based on SNP markers


Waxy maize (Zea mays L. var. ceratina Kulesh) is an important economic crop in China, most of which are distributed in Southwestern China. In this study, 30 main waxy maize inbred lines in Southwest China were used as materials, and genetic analysis of the tested waxy corn materials was carried out using high-quality single nucleotide polymorphism (SNP) marker technology. A total of 15,111 SNPs were obtained from 30 test materials, and the genetic similarity coefficient varied from 0.4568 to 0.9974. The results of population genetic structure and principal component analysis showed that the tested waxy maize materials and the commonly used common maize classification representative inbred lines (B73, ZI330, Mo17, Huangzao 4, etc.) could not be effectively clustered. The 30 waxy corn materials can be divided into five groups separately. The application of the genetic relationship between materials identified by SNP analysis will enable breeders to select different parents to develop high-yield varieties with improved quality traits.

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This work was supported by the Chongqing Scientific Research Institution Performance Incentive Guidance Project (cstc2020jxjl80012); Chongqing Basic Scientific Research Fund Project (2016cstc-jbky-00501). The author would like to thank Ms. Chen Xiangying, Chongqing Academy of Agricultural Sciences, for her help in writing this article.


This work was supported by the Chongqing Scientific Research Institution Performance Incentive Guidance Project (cstc2020jxjl80012); and Chongqing Basic Scientific Research Fund Project (2016cstc-jbky-00501).

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This work was carried out in collaboration among all authors. Authors C.Z. and S.W. designed the experiments and provided resources for all experiments. Authors W.Z., L.C. and T.Y. collected the tested materials and performed field management. Author C.Z. conducted the DNA extraction. Authors C.Z., S.Z. and X.C. performed the experiments, managed the data analysis and wrote the manuscripts.

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Correspondence to Caibo Zhang or Shuya Zhang.

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Zhang, C., Zhang, S., Chen, L. et al. Analysis of waxy maize germplasm resources in Southwest China based on SNP markers. Genet Resour Crop Evol (2022).

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  • Waxy maize
  • SNP
  • Genetic diversity
  • Heterotic group