The molecular characteristic analysis of TRIB2 gene and its expressional patterns in Bos grunniens tissue and granulosa cells.

Tribbles homolog 2 (TRIB2) plays an important role in the follicular development of female mammals. However, its expression and function in the yak () are still unclear. In this study, we predicted the molecular characteristics of , and revealed its expression pattern in yak () tissues and ovarian granulosa cells. We cloned the full length of the yak gene obtained by RT-PCR was 1368 bp and the coding sequence (CDS) was 624 bp, encoding 207 amino acids (AA). Homology analysis showed that the yak TRIB2 is highly conserved among species. was detected to be extensively expressed in seven tissues of the yak liver, spleen, lung, kidney, ovary, oviduct and uterus by qPCR. The expression of mRNA in the ovary during gestation was significantly lower than that in the non-pregnant ( < 0.05). At each stage of follicle development, the mRNA in granulosa cells showed a significant upward trend with the development of follicles. The expression of gradually decreased with the increase of the culture time of the granulosa cells . In conclusion, these results suggest that TRIB2 may play an important role in the follicular development of yaks.