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Genome-wide association studies demonstrate that TASP1 contributes to increased muscle fiber diameter.

ABSTRACT: Muscle fiber diameter is an economically important trait because it affects meat yield and quality. However, the genetic basis underlying muscle fiber diameter has not been determined. In this study, we collected THREE muscular histological phenotypes in 479 ducks from an F₂ segregating population generated by mallard × Pekin duck crosses. We performed genome-wide association studies (GWAS) and identified a quantitative trait locus (QTL) significantly associated with muscle fiber diameter on chromosome 3. Then, we discovered the selection signatures using the fixation index among 40 mallards and 30 Pekin ducks in this QTL region. Furthermore, we characterized the recombination event in this QTL region and identified a 6-kb block located on TASP1 that was significantly associated with muscle fiber diameter. Finally, five SNPs were screened as potential causative mutations within the 6-kb block. In conclusion, we demonstrated that TASP1 contributes to an increase in muscle fiber diameter, which helps to characterize muscle development and contributes to the genetic improvement of meat yield and quality in livestock.

SUBMITTER: Liu D

PROVIDER: S-EPMC8178336 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature

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Genome-wide association studies demonstrate that TASP1 contributes to increased muscle fiber diameter.

Liu Dapeng D Fan Wenlei W Xu Yaxi Y Yu Simeng S Liu Wenjing W Guo Zhanbao Z Huang Wei W Zhou Zhengkui Z Hou Shuisheng S

Heredity 20210325 6

Muscle fiber diameter is an economically important trait because it affects meat yield and quality. However, the genetic basis underlying muscle fiber diameter has not been determined. In this study, we collected THREE muscular histological phenotypes in 479 ducks from an F<sub>2</sub> segregating population generated by mallard × Pekin duck crosses. We performed genome-wide association studies (GWAS) and identified a quantitative trait locus (QTL) significantly associated with muscle fiber diam ...[more]

PMID: 33767369

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Genome-wide association studies demonstrate that TASP1 contributes to increased muscle fiber diameter.

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Genome-wide association studies demonstrate that TASP1 contributes to increased muscle fiber diameter.

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