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Polymorphism of 5′ regulatory region of ovine FSHR gene and its association with litter size in Small Tail Han sheep

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Abstract

Single nucleotide polymorphisms of 5′ regulatory region of follicle-stimulating hormone receptor (FSHR) gene were detected in two high prolificacy sheep breeds (Small Tail Han and Hu sheep) and two low prolificacy sheep breeds (Corriedale and Chinese Merino sheep) by polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP). The results indicated that there were three genotypes (AA, AB and BB) detected by primer 1 in Hu sheep while only one genotype (AA) in other three sheep breeds, and frequencies of AA, AB and BB genotypes in Hu sheep were 0.700, 0.225 and 0.075, respectively. There were three genotypes (EE, EF and EG) detected by primer 3 in Small Tail Han sheep while only EE genotype occurred in other three sheep breeds, and frequencies of EE, EF and EG genotypes in Small Tail Han sheep were 0.775, 0.200 and 0.025, respectively. No polymorphism was detected in four sheep breeds by primer 2 and primer 4. The sequencing results showed that there were two nucleotide mutations (g. −681T>C and g. −629C>T) in genotype BB compared with AA for primer 1. As for primer 3, two mutations (g. −197G>A and g. −98T>C) in genotype EF compared with EE and two mutations (g. −200G>A and g. −197G>A) in genotype EG compared with EE. The heterozygous ewes with EG or EF had 0.89 (P < 0.05) or 0.42 (P < 0.05) lambs more than homozygous ewes (EE genotype) in Small Tail Han sheep, respectively, while there was no significant difference on litter size between EG and EF ewes.

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Acknowledgments

This work was supported by National Key Technology Research and Development (R&D) Program of China (No. 2008BADB2B01, No. 2006BAD01A11 and No. 2006BAD13B08), by the earmarked fund for China Agriculture Research System (No. CARS-39), by National Key Basic R&D Program of China (No. 2006CB102105), by Beijing Natural Science Foundation of China (No. 5042017), and by Special Fund for Basic Scientific Research of Institute of Animal Science, Chinese Academy of Agricultural Sciences (ywf-td-1 and 2009td-1).

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Correspondence to M. X. Chu.

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Chu, M.X., Guo, X.H., Feng, C.J. et al. Polymorphism of 5′ regulatory region of ovine FSHR gene and its association with litter size in Small Tail Han sheep. Mol Biol Rep 39, 3721–3725 (2012). https://doi.org/10.1007/s11033-011-1147-x

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