2020 Volume 91 Issue 3 Pages 185-191
In the present study, we analyzed the genetic diversity for coat color in Japanese native Noma horses. Besides defining coat color classes (gray, chestnut, bay and black), the genotypes were detected by using RFLP analysis. We also measured the phenotypes quantitatively according to standardized international procedures (CIE1976 L*, a*, b*) and conducted to classify by principal component analysis. As the result of RFLP analysis, the frequency of recessive genes was high at all loci of extension(E/e), agouti(A/a), and gray(G/g), and this result was due to consideration for coat color at mating. As a result of the color difference measurement by the L * a * b * color system, a significant difference was not recognized between each hair color cleary. As a result of the principal component analysis for all non-gray horses, chestnut, bay and black coat color showed continuous distribution, and these three primary colors could not be clearly distinguished. These results suggested the possibility of involvement other coat color genes by the spectrometric measures.
