【摘要】 为了探讨湖羊多胎的机理,以新疆军垦型细毛羊为对照,研究了江苏湖羊妊娠43d的子宫内环境。结果显示,湖羊的胎儿平均体质量显著低于新疆细毛羊(P<0.05),两者的胎儿体长和胎膜质量差异不显著(P>0.05);湖羊子宫质量和子宫腺体内外径极显著高于新疆细毛羊(P<0.01),但子宫肌层厚度极显著低于新疆细毛羊(P<0.01);湖羊子叶RNA/DNA比值和干物质含量极显著高于新疆细毛羊(P<0.01),而葡萄糖含量极显著低于新疆细毛羊(P<0.01),子叶数量和面积差异不显著(P>0.05)。以上结果表明,湖羊高产可能与其胎儿个体较小而子宫容量相对较大,子宫腺体腔大而营养物质相对丰富,子叶细胞活动旺盛而转运物质功能较好使多个胚胎能较好的存活有关。更多还原

【Abstract】 To study the fecundity mechanism of Hu sheep,the intrauterine environment during early pregnancy(Day 43)of Hu sheep(Hu)were examined compared to Xinjiang Fine Wool sheep (XJ).The fetal average weight of Hu was lower than that of XJ(P<0.05)and there was no difference in fetal length and fetal membrane weight(P>0.05).The uterine weight and the outer and inside diameter of uterine gland of Hu were significantly higher than that of XJ(P<0.01), while the thickness of mesometrium of Hu was significantly lower than that of XJ(P<0.01). The RNA/DNA ratio and dry material content in cotyledon of Hu were significantly higher than that of XJ(P<0.01),while the glucose content was significantly lower than that of XJ(P< 0.01),and the number and size of cotyledon had no significant differences(P>0.05)between the two breeds.The results suggested that the fecundity of Hu sheep was possibly related to the smaller embryo in the larger uterine antrum,the abundant nutrients in the larger uterine gland cavity,the fine transportation function of active cotyledon cells and so as to protect embryos to develop all right.更多还原