Multiple alpha-globin genes in crab-eating macaques (Macaca fascicularis)

Area of Science:

• Genetics
• Primate Biology
• Molecular Evolution

Background:

• Alpha-globin genes are crucial for oxygen transport.
• Gene copy number variations can impact physiological functions.
• Crab-eating macaques (Macaca fascicularis) are a widely distributed primate species.

Purpose of the Study:

• To investigate the prevalence of alpha-globin gene copy number variations in crab-eating macaques.
• To determine the geographical distribution of alpha-globin gene triplication and quadruplication.
• To understand the genetic diversity of alpha-globin genes in this primate population.

Main Methods:

• Restriction enzyme analysis was employed to compare alpha-globin gene structures.
• DNA samples were analyzed from crab-eating macaques across different geographical regions.
• Gene copy numbers were quantified using established molecular techniques.

Main Results:

• Alpha-globin gene triplication was frequent in macaques from Malaysia (0.432) and Indonesia (0.275).
• Quadruplicated alpha-globin genes were observed in Malaysia (0.045), Indonesia (0.075), and the Philippines (0.021).
• No triplication was detected in macaques from the Philippines or northern/central Thailand; a single locus was rare (0.025 in Indonesia).

Conclusions:

• Significant geographical variation exists in alpha-globin gene copy number in crab-eating macaques.
• Gene duplication, particularly triplication, is a common genetic trait in certain macaque populations.
• These findings contribute to understanding primate genetic diversity and adaptation.