摘要
研究了添加VA、VC和VE混合物(1.5 kg/t饲料)对浙东白鹅繁殖性能、血浆激素浓度和下丘脑-垂体-性腺轴基因mRNA水平的影响。结果显示:饲喂维生素混合物可显著提高浙东白鹅第1产蛋周期蛋重和受精率(P<0.05),但对第2产蛋周期产蛋量、蛋重、受精率和孵化率影响有限;饲喂维生素混合物可提高浙东白鹅第2产蛋周期内血浆FSH、P4、HCG和赖抱期、恢复期E2的浓度,降低LH浓度,改变浙东白鹅产蛋周期内FSH波动规律(P<0.05),降低下丘脑内PRLR、垂体内PRL和卵巢内PRLR基因的mRNA水平(P<0.05),提高卵巢内ESR2基因的mRNA水平(P<0.05),对下丘脑内GnRH、垂体内PRL和FSHβ、卵巢内PRL、ESR1和FSHR基因的mRNA水平影响不显著。因此,VA、VC和VE混合物可以通过影响繁殖期内部分血浆激素浓度变化,下调生殖轴PRLR mRNA水平以减弱PRL信号,从而改善浙东白鹅的繁殖性能。
This study was conducted to investigate the effects of addition of vitamin A, C and E mixture the reproduction, plasma hormone concentration and mRNA levels of genes in hypothalamus-pituitary- 5 kg/t basal diet） on gonadal axis of Zhedong White Goose. The results showed that the mixture significantly increased the egg weight and fertility rate （P〈0.05） in the first laying period, but had limited effects on the egg production, egg weight,fertility rate and hatchability rate in the second laying period; and the mixture increased the concentrations of plasma FSH ,P4, HCG and E2, and decreased the concentration of LH, and changed FSH pattern （P〈0.05） in the second laying period. The mixture also decreased GnRH, PRL and PRLR mRNA lev- els in the hypothalamus, pituitary and ovary respectively （P〈0.05）,and increased ESR2 mRNA level in the ovary （P〈0.05） However, there was no significant effects on mRNA levels of PRLR in hypothalamus,PRLR, FSHfl in FSHR in ovary. Take together, vitamin A, C and E mixture could improve the reproductive performance reproductive hormone concentrations and patterns, and reducing PRL signal due to decreasing PRLR pituitary,ESR1 ,PRL and by affecting some plasma mRNA level in Zhedong
出处
《中国草食动物》
2012年第1期5-9,共5页
China Herbivores
基金
浙江省宁波市农业科研攻关项目(2009C10024)
关键词
维生素
浙东白鹅
繁殖性能
激素
生殖轴
MRNA
vitamin
Zhedong White Goose
reproduction
hormone
reproductive axis
mRNA
作者简介
赵鑫（1985-），男，硕士研究生
通讯作者：周卫东（1968-），男，副研究员，博士。
