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- W3092893009 abstract "Few studies exist on homozygous myostatin gene mutant (MSTN-/- ) pigs, especially on their reproductive ability. We have previously shown that semen quality of homozygous MSTN-/- boars is comparable to that of wild type (WT). However, no data exist on the reproductive ability of heterozygous MSTN gene mutant (MSTN+/ - ) sows. The present study highlights showed that the heterozygous MSTN+/ - sows have delayed pubertal age than WT sows (255.80 ± 6.79 versus 191.10 ± 3.42, respectively). The number of services per pregnancy of heterozygous MSTN+/ - sows is significantly higher than that of WT sows (3.33 ± 0.43 versus 1.60 ± 0.25, respectively). Moreover, although heterozygous MSTN+/ - sows have natural reproduction ability, their litter size was significantly lower than that of WT sows (7.75 ± 0.44 versus 14.25 ± 0.60, respectively). Offsprings generated from heterozygous MSTN+/ - sow and homozygous MSTN-/- boar were genotyped with the PCR and sequencing method to detect myostatin mutation and to identify whether the piglets are homozygous MSTN-/- or heterozygous MSTN+/ - . The proportion of homozygous MSTN-/- piglets was significantly lower than that of heterozygous MSTN+/ - piglets (2.50 ± 0.35 versus 5.25 ± 0.60, respectively). Furthermore, none of the sows presented dystocia, and the phenotype of heterozygous MSTN+/ - piglets was normal. However, 10% homozygous MSTN-/- piglets died of dyspnoea within 2 hr after birth, 60% of homozygous MSTN-/- piglets showed large tongues, and 50% had umbilical hernias. In summary, this study for the first time reports the reproduction traits of heterozygous MSTN+/ - sows crossbred with homozygous MSTN-/- boars. This study will pave the way in a new direction for the breeding and development of super lean meat varieties in the future." @default.
- W3092893009 created "2020-10-22" @default.
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- W3092893009 date "2020-12-10" @default.
- W3092893009 modified "2023-10-17" @default.
- W3092893009 title "Reproduction traits of heterozygous <i>myostatin</i> knockout sows crossbred with homozygous <i>myostatin</i> knockout boars" @default.
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- W3092893009 doi "https://doi.org/10.1111/rda.13845" @default.
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