The expression and mutation of BMPR1B and its association with litter size in small-tail Han sheep (Ovis aries).

Archives Animal Breeding
Yu-Liang WenMing-Xing Chu

Abstract

Previous studies have shown that BMPR1B promotes follicular development and ovarian granulosa cell proliferation, thereby affecting ovulation in mammals. In this study, the expression and polymorphism of the BMPR1B gene associated with litter size in small-tail Han (STH) sheep were determined. The expression of BMPR1B was detected in 14 tissues of STH sheep during the follicular phase as well as in the hypothalamic-pituitary-gonadal (HPG) axis of monotocous and polytocous STH sheep during the follicular and luteal phases using quantitative polymerase chain reaction (qPCR). Sequenom MassARRAY® single nucleotide polymorphism (SNP) technology was also used to detect the polymorphism of SNPs in seven sheep breeds. Here, BMPR1B was highly expressed in hypothalamus, ovary, uterus, and oviduct tissue during the follicular phase, and BMPR1B was expressed significantly more in the hypothalamus of polytocous ewes than in monotocous ewes during both the follicular and luteal phases ( P < 0.05 ). For genotyping, we found that genotype and allele frequencies of three loci of the BMPR1B gene were extremely significantly different ( P < 0.01 ) between the monotocous and polytocous groups. Association analysis results showed that the g.29380...Continue Reading

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