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Quantitative trait loci for growth-related traits in Japanese quail (Coturnix japonica) using restriction-site associated DNA sequencing

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Abstract

This study aimed to identify quantitative trait loci (QTLs) for growth-related traits by constructing a genetic linkage map based on single nucleotide polymorphism (SNP) markers in Japanese quail. A QTL mapping population of 277 F2 birds was obtained from an intercross between a male of a large-sized strain and three females of a normal-sized strain. Body weight (BW) was measured weekly from hatching to 16 weeks of age. Non-linear regression growth models of Weibull, Logistic, Gompertz, Richards, and Brody were analyzed, and growth curve parameters of Richards was selected as the best model to describe the quail growth curve of the F2 birds. Restriction-site associated DNA sequencing developed 125 SNP markers that were informative between their parental strains. The SNP markers were distributed on 16 linkage groups that spanned 795.9 centiMorgan (cM) with an average marker interval of 7.3 cM. QTL analysis of phenotypic traits revealed four main-effect QTLs. Detected QTLs were located on chromosomes 1 and 3 and were associated with BW from 4 to 16 weeks of age and asymptotic weight of Richards model at genome-wide significant at 1% or 5% level. No QTL was detected for BW from 0 to 3 weeks of age. This is the first report identified QTLs for asymptotic weight of the Richards parameter in Japanese quail. These results highlight that the combination of QTL studies and the RAD-seq method will aid future breeding programs identify genes underlying the QTL and the application of marker-assisted selection in the poultry industry, particularly the Japanese quail.

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Acknowledgements

MIH would like to thank the Honjo International Scholarship Foundation for providing scholarships. We would like to thank Dr. L. Kawaguchi for assistance with the RAD-seq analysis, and the members of the Laboratory of Animal Breeding and Genetics at Hiroshima University for their collaboration and support.

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Correspondence to Mohammad Ibrahim Haqani, Akira Ishikawa or Masaoki Tsudzuki.

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The authors have no conflict of interest to declare.

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All procedures performed in this study were in accordance with the ethical standards. The animals were cared according to the protocol described in the Guidelines for Proper Conduct of Animal Experiments, Science Council, Japan.

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Informed consent was collected from all participants in this study.

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Communicated by Stefan Hohmann.

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Haqani, M.I., Nomura, S., Nakano, M. et al. Quantitative trait loci for growth-related traits in Japanese quail (Coturnix japonica) using restriction-site associated DNA sequencing. Mol Genet Genomics 296, 1147–1159 (2021). https://doi.org/10.1007/s00438-021-01806-w

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  • DOI: https://doi.org/10.1007/s00438-021-01806-w

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