The aim of this study is to investigate the genetic diversity in 15 STRs （short tandem repeats） loci of four minorities in Guangxi Province and to probe into the genetic variation and relationships among these ethni...The aim of this study is to investigate the genetic diversity in 15 STRs （short tandem repeats） loci of four minorities in Guangxi Province and to probe into the genetic variation and relationships among these ethnic groups. Allele frequencies of 15 STR loci were collected from 766 unrelated Mulao, Maonan, Miao, and Yao ethnic individuals by PCR-STR and sequencing, and their allele-frequency distribution were compared with each other. The genetic parameters and genetic distances were calculated, and the phylogenetic tree was constructed. Based on the results from this study, 135, 134, 148, and 145 alleles and 424, 432, 445, and 436 genotypes for 15 STR loci were observed in the Mulao, Maonan, Miao, and Yao minorities, respectively. The average heterozygosity of all ethnic groups analyzed was above 0.7; the cumulative power of discrimination （DP）, the probabilities of paternity exclusion （EPP）, and the polymorphic information content （PIC） were greater than 0.99999. Comparison of the allele-frequency distribution indicated that there were significant differences at most loci between Maonan vs. Miao, Yao vs. other groups, but no distinct differences between Mulao vs. Maonan, and Mulao vs. Miao minorities. The NJ tree based on the genetic distance showed that the four minorities were separated into two groups. Mulao and Maonan were clustered into one group, whereas Miao and Yao into the other. Our results revealed that 15 STR loci of the four minorities possessed high genetic diversities. Therefore, the combination of these 15 STRs is a powerful tool for forensic individual identification and paternity investigation, as well as anthropologic and genetic researches. The genetic variation and relationships among the 4 populations revealed by 15 STRs are basically consistent with their linguistic culture and ethical history.展开更多
Since the 1960s, social integration theorists have considered intermarriage to be an effective tool for promoting social solidarity. However, from a demographic perspective, unequal marriage exchange between groups ca...Since the 1960s, social integration theorists have considered intermarriage to be an effective tool for promoting social solidarity. However, from a demographic perspective, unequal marriage exchange between groups can create social division and conflict. This Chinese study is a contribution to these debates. This paper explores the issue in the context of a rural minority community in Rightqi, Inner Mongolia, taking social statistical methods and anthropological in-depth interview methods to investigate intermarriage between Mongolian and Han. The paper shows that the number of Han males married to Mongolian women is far greater than the number of Mongolian males marrying Han women. Most Hart people live in urban areas, while Mongolians predominantly reside in pastoral areas and there has been a significant trend for girls from the pastoral areas to marry urban males. Since the proportion of males to females in China has been increasing, the competition between men over female partners has intensified, leading to urban males recruiting partners from the countryside. As a result, young men from minorities in the rural areas are finding it increasingly difficult to marry and this generates a lot of social problems.展开更多
基金the National Natural Science Foundation of China (No. 30260044).
文摘The aim of this study is to investigate the genetic diversity in 15 STRs （short tandem repeats） loci of four minorities in Guangxi Province and to probe into the genetic variation and relationships among these ethnic groups. Allele frequencies of 15 STR loci were collected from 766 unrelated Mulao, Maonan, Miao, and Yao ethnic individuals by PCR-STR and sequencing, and their allele-frequency distribution were compared with each other. The genetic parameters and genetic distances were calculated, and the phylogenetic tree was constructed. Based on the results from this study, 135, 134, 148, and 145 alleles and 424, 432, 445, and 436 genotypes for 15 STR loci were observed in the Mulao, Maonan, Miao, and Yao minorities, respectively. The average heterozygosity of all ethnic groups analyzed was above 0.7; the cumulative power of discrimination （DP）, the probabilities of paternity exclusion （EPP）, and the polymorphic information content （PIC） were greater than 0.99999. Comparison of the allele-frequency distribution indicated that there were significant differences at most loci between Maonan vs. Miao, Yao vs. other groups, but no distinct differences between Mulao vs. Maonan, and Mulao vs. Miao minorities. The NJ tree based on the genetic distance showed that the four minorities were separated into two groups. Mulao and Maonan were clustered into one group, whereas Miao and Yao into the other. Our results revealed that 15 STR loci of the four minorities possessed high genetic diversities. Therefore, the combination of these 15 STRs is a powerful tool for forensic individual identification and paternity investigation, as well as anthropologic and genetic researches. The genetic variation and relationships among the 4 populations revealed by 15 STRs are basically consistent with their linguistic culture and ethical history.
文摘Since the 1960s, social integration theorists have considered intermarriage to be an effective tool for promoting social solidarity. However, from a demographic perspective, unequal marriage exchange between groups can create social division and conflict. This Chinese study is a contribution to these debates. This paper explores the issue in the context of a rural minority community in Rightqi, Inner Mongolia, taking social statistical methods and anthropological in-depth interview methods to investigate intermarriage between Mongolian and Han. The paper shows that the number of Han males married to Mongolian women is far greater than the number of Mongolian males marrying Han women. Most Hart people live in urban areas, while Mongolians predominantly reside in pastoral areas and there has been a significant trend for girls from the pastoral areas to marry urban males. Since the proportion of males to females in China has been increasing, the competition between men over female partners has intensified, leading to urban males recruiting partners from the countryside. As a result, young men from minorities in the rural areas are finding it increasingly difficult to marry and this generates a lot of social problems.
