数字农科院2.0

Analysis on DNA sequence of TSHB gene and its association with reproductive seasonality in goats

文献类型： 外文期刊

作者： Huang, D. W.;Wang, J. X.;Liu, Q. Y.;Chu, M. X.;Di, R.;He, J. N.;Cao, G. L.;Fang, L.;Feng, T.;Li, N.

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关键词： Goat;TSHB;Mutation;Reproductive seasonality

期刊名称： MOLECULAR BIOLOGY REPORTS

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收录情况： SCI

摘要： Thyroid stimulating hormone beta chain (TSHB) is mainly expressed in pituitary and its expression is closely related to photoperiodic control of seasonal reproduction in animals. In the present study, ten primer pairs have been used to clone the DNA sequence and to detect genetic mutations of goat TSHB gene. Two DNA fragments of goat TSHB gene were obtained, which were 2,614 and 1,031 bp in length, respectively. They comprised about 2.5 kb 5′ regulatory region, all of the three exons and two introns. Goat TSHB gene has a coding region of 417 bp, encoding 138 amino acids which was predicted to be a secretory protein with a signal peptide of 16 amino acids. The sequence of TSHB gene is highly conserved among mammals. In addition, five mutations (C53A, 3 bp Indel at the 287–289 locus, 34 bp Indel at the 584–617 locus, A1819C and E2_72TA) were found in goat TSHB gene and they were shown to be in strong linkage disequilibrium. Interestingly, the genotype distributions for both single locus and haplotype have shown to be significant different between seasonal and nonseasonal goat breeds. And haplotype H2 and diplotype H2/H4 may be related to year-round estrus. We preliminarily presumed that the five closely linked mutations of goat TSHB gene may be part of the causal sources for the diversities of reproductive seasonality in goats. Our study may provide a possible efficient genetic way to decrease seasonality in goats.

分类号： Q7

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