Correlation between reproductive hormone content in serum and lambing rate of Hotan sheep
The experiment aimed to explore the patterns of change in five reproductive hormones[follicle-stimulating hormone(FSH),luteinizing hormone(LH),progesterone(P4),testosterone(T),and estradiol(E2)]in the serum of Hotan sheep with different lambing rates.The experiment observed and recorded 25 single-lamb and multiple-lamb Hotan sheep,and used radioimmunoassay(RIA)to measure the levels of FSH,LH,and T in the serum,and enzyme-linked immunosorbent assay(ELISA)to measure the levels of E2 and P4 in the serum,and conducted a correlation analysis of the five serum hormone indicators.The results showed that the levels of FSH and P4 in the serum of multiple-lamb Hotan sheep were significantly higher than those of single-lamb Hotan sheep(P<0.05),and the level of LH was extremely lower than that of single-lamb Hotan sheep(P<0.01).There was no significant difference in the levels of E2 and T in the serum between single-lamb and multiple-lamb Hotan sheep(P>0.05).Correlation analysis showed that in the serum of single-lamb Hotan sheep,FSH was extremely positively correlated with LH(P<0.01),LH was significantly positively correlated with E2(P<0.05),and P4 was extremely negatively correlated with T(P<0.01).In the serum of multiple-lamb Hotan sheep,FSH was significantly positively correlated with LH(P<0.05).The study indicates that high levels of FSH and P4 may be associated with the multiple-lamb trait of Hotan sheep,and the increase in FSH levels and decrease in LH levels may also be the reason for the multiple lambing of Hotan sheep.
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