›› 2017, Vol. 44 ›› Issue (3): 799-806.doi: 10.16431/j.cnki.1671-7236.2017.03.025

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Polymorphism of FSHR Gene Exon 10 and Its Relationship with the Litter Size of Xiang Pigs

XU Yao1,2, LIU Chang1,2, NIU Xi2, RAN Xue-qin3, WANG Jia-fu1,2,4   

  1. 1. College of Life Sciences, Guizhou University, Guiyang 550025, China;
    2. Institute of Agro-bioengineering, Guizhou University, Guiyang 550025, China;
    3. College of Animal Science, Guizhou University, Guiyang 550025, China;
    4. Tongren University, Tongren 554300, China
  • Revised:2017-01-06 Online:2017-03-20 Published:2017-03-21

Abstract:

Follicle-stimulating hormone (FSH), a glycoprotein secreted from pituitary, can regulate ovarian function through the FSH receptor (FSHR).To evaluate the effects of FSHR gene on the litter size of Xiang pig population, the polymorphisms of FSHR gene exon 10 were detected by polymerase chain reaction (PCR) and sequencing methods, and the effect of polymorphisms in FSHR gene exon 10 on litter size traits in Xiang pigs was analyzed using the least square analysis.In eight candidate sites, there were two polymorphic loci were detected out from Xiang pig population, which were rs322800083 (C276T) and rs332115220 (T601C). Moreover, a new SNP novel 1 (G-92A) was discovered.Four haplotypes were constructed between rs322800083 and rs332115220 sites, in which C-T was the main haplotype (45.0%) and presented closely linkage disequilibrium (r2=0.334) in Xiang pig population. Furthermore, the haplotype C-T corresponded to the highest total number born (TNB) at the second fetus of Xiang pigs, haplotype C-C to the lowest TNB. It was notified that haplotype C-T produced 0.99 TNB of Xiang pigs more than haplotype C-C (P<0.05). And the TNB at the third fetus was also the highest in haplotype C-T, which produced 1.61 and 2.33 TNB more than haplotypes T-C and C-C (P<0.01). The genotypes of locus rs332115220 was weakly correlated with the third fetus of Xiang pig population (ρ=0.429).The results suggested that haplotype C-T could be used as a molecular marker to assist selection for the litter size of Xiang pigs.

Key words: FSHR gene; polymorphism; Xiang pigs; molecular marker

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