Abstract
Single nucleotide polymorphisms (SNPs) are abundant and evenly distributed throughout the genomes of most plant species. They have become an ideal marker system for genetic research in many crops. Several high throughput platforms have been developed that allow rapid and simultaneous genotyping of up to a million SNP markers. In this study, a custom GoldenGate assay containing 1,536 SNPs was developed based on public SNP information for maize and used to genotype two recombinant inbred line (RIL) populations (Zong3 x 87-1, and B73 x By804) and a panel of 154 diverse inbred lines. Over 90% of the SNPs were successfully scored in the diversity panel and the two RIL populations, with a genotyping error rate of less than 2%. A total of 975 SNP markers detected polymorphism in at least one of the two mapping populations, with a polymorphic rate of 38.5% in Zong3 x 87-1 and 52.6% in B73 x By804. The polymorphic SNPs in B73 x By804 have been integrated with previously mapped simple sequence repeat markers to construct a high-density linkage map containing 662 markers with a total length of 1,673.7 cM and an average of 2.53 cM between two markers. The minor allelic frequency (MAF) was distributed evenly across 10 continued classes from 0.05 to 0.5, and about 16% of the SNP markers had a MAF below 10% in the diversity panel. Polymorphism rates for individual SNP markers in pair-wise comparisons of genotypes tested ranged from 0.3 to 63.8% with an average of 36.3%. Most SNPs used in this GoldenGate assay appear to be equally useful for diversity analysis, marker-trait association studies, and marker-aided breeding.
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Abbreviations
- BAC:
-
Bacteria artificial chromosomes
- DH:
-
Doubled haploid
- EST:
-
Expression sequence tag
- FPC:
-
Fingerprinted contigs
- LD:
-
Linkage disequilibrium
- LOD:
-
Logarithm-of-odds
- MARS:
-
Marker-assisted recurrent selection
- MAS:
-
Marker-assisted selection
- NAM:
-
Nested association mapping
- NSF:
-
National science foundation
- OPA:
-
Oligo pool assay
- PCR:
-
Polymerase chain reaction
- QTL:
-
Quantitative trait locus
- RFLP:
-
Restriction fragment length polymorphisms
- RIL:
-
Recombinant inbred lines
- SAM:
-
Sentrix array matrix
- SNP:
-
Single nucleotide polymorphism
- SSR:
-
Simple sequence repeat
- STS:
-
Sequence tagged site
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Acknowledgments
We highly appreciate the molecular and functional diversity team of the NSF Maize Genome Project for making available all the SNPs information used in this study. We thank Dr. Ortiz Rodomiro (CIMMYT) for his critical review this manuscript. This research was supported by the National Hi-Tech Research and Development Program of China and the Bill & Melinda Gates Foundation through the Drought Tolerant Maize for Africa project (http://dtma.cimmyt.org/).
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Yan, J., Yang, X., Shah, T. et al. High-throughput SNP genotyping with the GoldenGate assay in maize. Mol Breeding 25, 441–451 (2010). https://doi.org/10.1007/s11032-009-9343-2
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DOI: https://doi.org/10.1007/s11032-009-9343-2