Nucleotide resolution genetic mapping in pigs by publicly accessible whole genome imputation
Ding, R.; Savegnago, R.; Liu, J.; Long, N.; Tan, C.; Cai, G.; Zhuang, Z.; Wu, J.; Yang, M.; Qiu, Y.; Ruan, D.; Quan, J.; Zheng, E.; Hong, L.; Li, Z.; Tan, S.; Bedhane, M.; Schnabel, R.; Steibel, J.; Gondro, C.; Yang, J.; Huang, W.; Wu, Z.
Show abstract
Genetic mapping to identify genes and alleles associated with or causing economically important quantitative trait variation in livestock animals such as pigs is a major goal in the genetic improvement animals. Despite recent advances in high throughput genotyping technologies, resolution of genetic mapping in pigs remains poor due in part to the low density of genotyped variant sites. In this study, we overcame this limitation by developing a reference haplotype panel for pigs based on 2,259 whole genome sequenced animals representing 44 pig breeds. We optimized the imputation procedure to achieve an average concordance rate in excess of 97%, non-reference concordance rate 91%, and r2 0.89. We demonstrated that genotype imputation using this resource can dramatically improve resolution of genetic mapping. Finally, we developed a public web server (swimgeno.org) to allow the pig genetics community to fully utilize this resource. We expect the resource and server to significantly facilitate genetic mapping and accelerate genetic improvement in pigs.
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