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Effects of 25‐hydroxycholecalciferol supplementation in maternal diets on reproductive performance and the expression of genes that regulate lactation in sows
Author(s) -
Wang Kai,
Chen Yun,
Zhang DeLong,
Wang RongGen,
Zhao ZhiHong,
Feng MeiYing,
Wei HengXi,
Li Li,
Zhang Shouquan
Publication year - 2020
Publication title -
animal science journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.606
H-Index - 38
eISSN - 1740-0929
pISSN - 1344-3941
DOI - 10.1111/asj.13391
Subject(s) - lactation , biology , gene , reproduction , endocrinology , gene expression , andrology , pregnancy , medicine , zoology , physiology , genetics
One hundred Yorkshire × Landrace sows were randomly assigned to one of two dietary treatments (diet ND: 6,000 IU vitamin D 3 /d feed; diet 25‐D: 200 μg/day 25OHD 3 feed). The experiment began on d 90 of gestation and continued until weaning on day 21 of lactation. In sows that received 25OHD 3 , the growth rate of the piglets before weaning was significantly accelerated (0.266 kg/day, p < .05). Sow serum was collected after weaning, and those in the 25OHD 3 group were found to have significantly higher serum calcium (CA) and phosphorus (PI) levels ( p < .05). Interestingly, the oestrus cycle of sows fed 25OHD 3 was significantly shortened ( p < .05), the oestrus time was concentrated on the fifth day after weaning, and the piglets were born with a higher degree of uniformity ( p < .05). Colostrum was collected on the day of delivery, and the colostrum of sows fed 25OHD 3 contained higher milk fat content than the control group ( p < .05). 25OHD 3 supplementation increased the mRNA and protein expression of INSIG1 and SREBP1, which regulate milk fat synthesis, in the mammary gland of lactating sows ( p < .05). In conclusion, 25OHD 3 supplementation in maternal diets improved reproductive performance, milk fat content and the mRNA and protein levels of genes regulating milk fat synthesis in lactating sows.