和牛の被毛褪色に関する研究(第II報) : 褪色化牛被毛の形態学的並びに組織学的研究

その他

In order to account for the morphological and histological differencies between the normal hair of calves ana the fading one which occurred at Nogigun in Shimane-Ken, we have made investigations on the following points : hair length, hair size, location of fading parts and development of hair medulla.
The results obtained hitherto are as follows;
1. There was no significant difference in length and size between the normal hair and the fading one.
2. Fading in one-third part from top of hair showed the highest percentage (average 66.4%), which was followed by spotted-fading all over the hair (average 15.3%).
3. The hair medulla of the affected was inferior in its development to that of the normal with the percentage of risk in 0.01 level. The ratio of the presence of hair medulla were much lower in the former.