Non- conding RNA(nc RNA)plays an important role in the cellular activities,although these non- coding RNAs do not express the proteins,they play key roles in the regulation of target gene expression at transcription,post- transcription and translation levels,involved in eukaryotic growth and development,cell proliferation and differentiation,metabolism,cell signalling and immune response,and have been the hot frontier of life sciences in recent years. The research progress in nc RNA of yak and the utilizati...