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Development of CACTA transposon derived SCAR markers and their use in population structure analysis in Zea mays

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Abstract

Molecular marker technologies have proven to be an important breakthrough for genetic studies, construction of linkage maps and population genetics analysis. Transposable elements (TEs) constitute major fractions of repetitive sequences in plants and offer a wide range of possible areas to be explored as molecular markers. Sequence characterized amplified region (SCAR) marker development provides us with a simple and time saving alternative approach for marker development. We employed the CACTA-TD to develop SCARs and then integrated them into linkage map and used them for population structure and genetic diversity analysis of corn inbred population. A total of 108 dominant SCAR markers were designed out of which, 32 were successfully integrated in to the linkage map of maize RIL population and the remaining were added to a physical map for references to check the distribution throughout all chromosomes. Moreover, 76 polymorphic SCARs were used for diversity analysis of corn accessions being used in Korean corn breeding program. The overall average polymorphic information content (PIC) was 0.34, expected heterozygosity was 0.324 and Shannon’s information index was 0.491 with a percentage of polymorphism of 98.67%. Further analysis by associating with desirable traits may also provide some accurate trait specific tagged SCAR markers. TE linked SCARs can provide an added level of polymorphism as well as improved discriminating ability and therefore can be useful in further breeding programs to develop high yielding germplasm.

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Acknowledgements

This work was funded by a grant from the Golden Seed Project, Ministry of Agriculture, Food and Rural Affairs (MAFRA), Ministry of Oceans and Fisheries (MOF), Rural Development of Korea (RDA), and the Korea Forest Service (Project No. ATIS-PJ012650022017, FRIS-213009-05-1-WT812). We extend our appreciation to Dr. George Fedak for reading the manuscript.

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Correspondence to Nam-Soo Kim.

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Authors declare no conflict of interest on the contents of the manuscript.

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Neha Samir Roy and Kyong-Cheul Park have contributed equally to the manuscript.

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Roy, N.S., Park, KC., Lee, SI. et al. Development of CACTA transposon derived SCAR markers and their use in population structure analysis in Zea mays . Genetica 146, 1–12 (2018). https://doi.org/10.1007/s10709-017-9985-7

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  • DOI: https://doi.org/10.1007/s10709-017-9985-7

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