Genetic Frequencies of Four Hereditary Traits in the Gejia Ethnic Group
Objective:To investigate the distribution characteristics of genetic frequencies of four hereditary traits in the Ge-jia ethnic group.Methods:Using academically recognized survey methods,morphological observations were conducted on four pairs of hereditary traits(thumb type,relative length of the ring and index fingers,hair on the middle finger,and little finger cur-vature)among 412 individuals(217 males and 195 females)of the Gejia ethnic group who have lived in Zhong'an Town,Huang-ping County,Guizhou Province.The dominant gene frequencies were compared with those of other ethnic groups reported domesti-cally and subjected to hierarchical cluster analysis.Results:The dominant gene frequencies of thumb type,relative length of the ring and index fingers,hair on the middle finger,and little finger curvature in the Gejia ethnic group were 0.2761,0.0901,0.3159,and 0.2611,respectively.Among males,these frequencies were 0.2845,0.0840,0.3739,and 0.2686,respectively,and among females,they were 0.2665,0.0972,0.2557,and 0.2523,respectively.Except for hair on the middle finger,there were no statistically significant differences in the dominant gene frequencies of the other three hereditary traits between genders(P＞0.05).Compared with other ethnic groups in China,the dominant gene frequencies of thumb type and hair on the mi-ddle finger in the Gejia ethnic group were of the lower-middle type,while those of relative length of the ring and index fingers and little finger curvature were of the lower type.Cluster analysis revealed that the Gejia ethnic group had a closer genetic distance to southern Chinese ethnic groups in terms of these four hereditary traits.Conclusion:The distribution characteristics of genetic fre-quencies of the four hereditary traits in the Gejia ethnic group exhibit both the genetic traits of southern Chinese ethnic groups and their own unique ethnic characteristics.
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万方数据
