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This study aimed to investigate the association between polymorphisms of  ND1  and  CYTB  genes and  in vitro  early embryo development of Sanjabi sheep. Blood and ovarian samples were collected from a local slaughterhouse. The cumulus-oocyte complexes with a diameter greater than 3 mm were aspirated from follicles, and  in vitro  maturation (IVM) and  in vitro  culture (IVC) rates of them were recorded. A respective 1200 bp and 980 bp fragments of  ND1  and  CYTB  genes were genotyped using a modified single strand conformation polymorphism (SSCP) method. The results of this study revealed that four different patterns, named as A, B, C, and D were observed for both  ND1  and  CYTB  genes. The  ND1  gene polymorphisms had significant effects on the IVM and IVC rate ( p  &lt; 0.05). The pattern C of the  ND1  gene significantly increased the IVM rate compared to the patterns A, B and D. For the IVC, the highest and lowest means were related to the C and B patterns, respectively. The  CYTB  gene polymorphisms also had significant effects on IVC ( p  &lt; 0.01), but the IVM did not affected ( p  = 0.07). Here, the pattern D had the highest and the pattern C had the lowest means for both IVM and IVC rates.

The ND1 and CYTB genes polymorphisms associated with in vitro early embryo development of Sanjabi sheep