Genetic studies of tongue moving types in Xiang dialects population

To investigate the character of five tongue moving types of Han nationality in Hunan province,A sample of 507 student s of Han(268 males,239 females) was investigated on 5 tongue moving types,including tongue rolling,tongue folding,tongue twisting,pointed tongue and clover-leaf tongue.The results were as follows:(1) The frequencies of tongue rolling,tongue folding,tongue twisting,pointed tongue and clover-leaf tongue were 64.30%,10.26%,23.08%,64.50 % and 4.54 % respectively.(2) Comparing with other nationalities,Loudi Han had a higher frequency of tongue folding The frequencies of tongue twisting,tongue rolling,pointed tongue were middle.,clover-leaf's frequencies is lower.(3) No significant sexual difference was found in the frequencies of tongue moving types except tongue rolling and pointed tongue.(4) The genes of tongue rolling and tongue folding had interactive relations with the gene of tongue twisting.The genes of tongue twisting and tongue rolling had interactive relations with the gene of pointed tongue.