Analysis of three RFLPs of the COL1A2 (Type I Collagen) in the Amhara and the Oromo of Ethiopia

Autor: Marco Tartaglia, Olga Rickards, Andrea Novelletto, G. F. De Stefano, Cristina Martínez-Labarga, R Casalotti, Guglielmina Pepe
Rok vydání: 2002
Předmět:
Male
haplotype
Aging
Physiology
Epidemiology
ethnic group
Gene Frequency
Ethnicity
Socioeconomics
restriction fragment length polymorphism
Likelihood Functions
education.field_of_study
Middle East
Traditional medicine
alpha 2(I) collagen
allele
article
COL1A2 gene
Genetic differentiation
genetics
collagen
chromosome 7
Ethiopia
ethnology
female
gene frequency
genetic marker
human
male
molecular genetics
nucleotide sequence
phenotype
statistical model
Alleles
Base Sequence
Chromosomes
Human
Pair 7
Collagen
Ethnic Groups
Female
Genetic Markers
Haplotypes
Humans
Molecular Sequence Data
Phenotype
Polymorphism
Restriction Fragment Length
Geography
Genetic structure
Pair 7
Restriction fragment length polymorphism
Population
Genetic relationship
Chromosomes
Collagen Type I
Genetics
Polymorphism
education
Public Health
Environmental and Occupational Health
Settore BIO/18 - Genetica
Restriction Fragment Length
North african
Zdroj: Annals of Human Biology. 29:432-441
ISSN: 1464-5033
0301-4460
DOI: 10.1080/03014460110101440
Popis: The present composition of the Ethiopian population is the result of a complex and extensive intermixing of different peoples of North African, Near and Middle Eastern, and south-Saharan origin. The two main groups inhabiting the country are the Amhara, descended from Arabian conquerors, and the Oromo, the most important group among the Cushitic people. With the exception of some surveys on the general Ethiopian populations, little is known about the degree of genetic differentiation between the Amhara and the Oromo.The study seeks to investigate the genetic structure of these two heterogeneous Ethiopian populations and to characterize their relationships with other African and Mediterranean peoples.Amhara and Oromo individuals (n = 171) were analysed for three RFLPs (restriction fragment length polymorphisms) of the COL1A2 gene. To better define the genetic relationship between the two Ethiopian groups, and also between African and non-African peoples, genetic distances among Amhara, Oromo and other populations were estimated using the COL1A2 allele and haplotype frequencies, and the allele frequencies of 16 additional classical markers.chi(2) analysis applied to the COL1A2 allele and haplotype frequencies showed a small but statistically significant degree of heterogeneity between the two Ethiopian populations. Combining the information obtained from the three RFLP markers, a significant level of differentiation (Fst = 0.0147, p = 0.036) was also detected between Amhara and Oromo. The genetic distance analysis showed the separation between African and non-African populations, with the Amhara and Oromo located in an intermediate position. This pattern is consistent with the location of the two Ethiopian groups in other genetic analysis and with cultural data.The present findings suggest the presence of a differential level of genetic relatedness with south-Saharan peoples in the two Ethiopian groups, which could reflect their different history and seems to indicate the existence of genetic sub-structure within the country.
Databáze: OpenAIRE
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