The separation of 6 sublines of EM mouse concerned with coat colour

Abstract

The inbred stock of the EM agouti mouse has offered a deviation of six new sublines each of which are characterized by coat colours as follows: agouti, dilute agouti, cinnamon, dilute cinnamon, black and albino. At first, one female albino, two male cinnamon, one dilute agouti and male and female blacks appeared in the same litter which was derived from the agouti parent. In order to separate each phenotype, cinnamon specimen was mated to albino specimen, cinnamon specimen to dilute agouti specimen, and black specimens were inbred. Two additional characters, dilute cinnamon and agouti, have appeared in the offspring of albino × cinnamon. Above six strains have been inbred in order to fix each character.
At present, each of the characters seems to be mostly fixed, so far as the coat colour is concerned. Their genotypes are not clear, and the genetical tests have been now in progress.