Sequence variation and polymorphic sites observed on the mitochondrial D-loop sequence. AY488491.1: Ref. from GenBank; CO: Co goat; BT: Bach Thao goat; RB: Red Boer goat; WB: White Boer goat; SA: Saanen goat. A: Adenine; T: Thymine; G: Guanine; C: Cytosine; (.):