Characterization of genetic diversity and gene mapping in two Swedish local chicken breeds

Frontiers in Genetics
Anna M Johansson, Ronald M Nelson

Abstract

The aim of this paper is to study genetic diversity in the two Swedish local chicken breeds Bohuslän-Dals svarthöna and Hedemorahöna. The now living birds of both of these breeds (about 500 for Bohuslän-Dals svarthöna and 2600 for Hedemorahöna) originate from small relicts of earlier larger populations. An additional aim was to make an attempt to map loci associated with a trait that are segregating in both these breeds. The 60k SNP chip was used to genotype 12 Bohuslän-Dals svarthöna and 22 Hedemorahöna. The mean inbreeding coefficient was considerably larger in the samples from Hedemorahöna than in the samples from Bohuslän-Dals svarthöna. Also the proportion of homozygous SNPs in individuals was larger in Hedemorahöna. In contrast, on the breed level, the number of segregating SNPs were much larger in Hedemorahöna than in Bohuslän-Dals svarthöna. A multidimensional scaling plot shows that the two breeds form clusters well-separated from each other. Both these breeds segregate for the dermal hyperpigmentation phenotype. In Bohuslän-Dals svarthöna most animals have dark skin, but some individuals with lighter skin exists (most easily detected by their red comb). An earlier study of the Fm locus showed that this breed has the s...Continue Reading

References

Mar 27, 2007·Bioinformatics·Yurii S AulchenkoCornelia M van Duijn
Nov 17, 2010·PLoS Genetics·Anna M JohanssonOrjan Carlborg
Jun 2, 2011·BMC Genomics·Martien A M GroenenHans H Cheng

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Citations

Dec 5, 2015·Frontiers in Genetics·Stéphane JoostUNKNOWN Genomic-Resources Consortium
Mar 19, 2020·Animals : an Open Access Journal From MDPI·Salvatore MastrangeloMartino Cassandro

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BETA
chip
genotyping
MDS

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custom
R scripts
GenAbel
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