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The Tibetan sheep is an indigenous breed living in the entire Tibetan Plateau, and its origin and phylogenic relationships are still uncertain and controversial. In this study, we analyzed partial mtDNA D-loop sequences of 156 Chinese Tibetan sheep individuals from 12 distributed geographic ecotype populations. Phylogenetic analysis indicated that three maternal lineages (haplogroups A, B and C) were found in this breed and that Ovis vignei and Ovis ammon have possibly contributed to the original Tibetan sheep. The absence of haplogroups D and E in Tibetan sheep suggests that this breed did not originate in the Middle East, China.

Bone morphogenetic protein 15 (BMP15) is crucial factor for ovulation as well as for increasing litter size. In the present investigation efforts had been carried out to assess the genetic variations in Exon 2 region of BMP15 in goat, using polymerase chain reaction single strand conformation polymorphism (PCR-SSCP) sequencing methods and cooperated frequency distribution to discuss its possibility of related fecundity. Across the 144samples from six breeds were identified in the A963G location of BMP15 using PCR-SSCP and sequences technology. A963A genotype was the most frequent (85.4%) and G963G was the least frequent with a frequency of 4.2% and A963G is 10.4%. It revealed non significant different between high and low fecundity breed. Therefore, this single nucleotide variant is not common Bio-Marker for fecundity in Goat.