Associations of IGF2 and DRD2 polymorphisms with laying traits in Muscovy duck
文献类型: 外文期刊
第一作者: Nie, Qinghua
作者: Nie, Qinghua
作者机构:
关键词: Insulin-like growth factor 2;Dopamine receptor 2;Polymorphisms;Association analysis;Muscovy duck;Egg production traits
期刊名称:PEERJ ( 影响因子:2.984; 五年影响因子:3.369 )
ISSN: 2167-8359
年卷期: 2017 年 5 卷
页码:
收录情况: SCI
摘要: Insulin-like growth factor 2 (IGF2) and dopamine receptor 2 (DRD2) play important roles in ovarian follicular development. In this study, we analyzed tissue-specific expression of the Muscovy duck IGF2 and DRD2 genes and cloned those genes transcripts. Polymorphisms in these genes were tightly linked with egg production traits and both genes were highly expressed in the ovary. Moreover, we identified five single nucleotide polymorphisms (SNPs) for IGFI and 28 for DRD2. Mutations A-1864G and 'C-1704G of IGF2 were positively correlated with increased egg laying at 59 weeks (E59W) (P < 0.05). The C+7T and C4-364G mutations of DRD2 were highly and significantly associated with first-egg age (FEA) and egg numbers at 300 days (E300D) (P < 0.01). Moreover, C+3301G and C-I-3545G of DRD2 were highly significantly associated with FEA, E59W and E300D (P < 0.01). Other mutations were positively associated with FEA or E300D or E59W (P < 0.05). These data suggest specific roles for IGF 1 and DRD2 polymorphisms in egg production in Muscovy ducks.
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