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Titolo:
Inbreeding in Gredos mountain range (Spain): Contribution of multiple consanguinity and intervalley variation
Autore:
Fuster, V; Jimenez, AM; Colantonio, SE;
Indirizzi:
Univ Complutense, Fac Biol, Dept Biol Anim I Antropol, E-28040 Madrid, Spain Univ Complutense Madrid Spain E-28040 I Antropol, E-28040 Madrid, Spain Univ Nacl Cordoba, Fac Ciencias Exactas Fis & Nat, Escuela Biol, CONICET, RA-5000 Cordoba, Argentina Univ Nacl Cordoba Cordoba Argentina RA-5000 , RA-5000 Cordoba, Argentina
Titolo Testata:
HUMAN BIOLOGY
fascicolo: 2, volume: 73, anno: 2001,
pagine: 249 - 270
SICI:
0018-7143(200104)73:2<249:IIGMR(>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
SIERRA; POLYMORPHISMS; MARRIAGES; BEHAVIOR; PATTERNS; FINLAND;
Keywords:
consanguineous matings; mating patterns; temporal variation; Gredos; Spain;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Fuster, V Univ Complutense, Fac Biol, Dept Biol Anim I Antropol, E-28040 Madrid, Spain Univ Complutense Madrid Spain E-28040 l, E-28040 Madrid, Spain
Citazione:
V. Fuster et al., "Inbreeding in Gredos mountain range (Spain): Contribution of multiple consanguinity and intervalley variation", HUMAN BIOL, 73(2), 2001, pp. 249-270

Abstract

The present paper examines consanguineous marriages occurring between 1874and 1975 in three valleys (Tormes, Alberche, and Tietar) in the Sierra de Gredos mountain range, Avila province, Spain. Information was obtained fromparish registers of 42 localities, corresponding to a total of 41,696 weddings. Consanguineous marriages were defined as those up to the third degreeof consanguinity (second cousins). From 1874 to 1975 the percentage of related mates was 4.45% and the inbreeding coefficient was 0.0011868 (for 1874to 1917 corresponding figures up to the fourth degree were 16.44% and 0.0019085, respectively). In order to ascertain the characteristics and evolution of mating patterns in Gredos, the contribution of each degree of kinshipwas analyzed as a whole and then for each valley separately. Regarding total consanguineous marriages in Gredos, there is a low frequency of uncle-niece matings (0.21 %) and a first-second cousin mating ratio (C22/C33) of 0.23 (up to the third degree of consanguinity). Before 1918 multiple matings (i.e., those involving more than a single relationship) accounted for 19.16% of consanguineous marriages (up to the fourth degree). The observed frequencies of multiple consanguineous marriages was, on average. about twice that expected at random, and the proportion of such marriages to total inbreeding was 34.65%. The temporal change of the Gredos inbreeding pattern was characterized by a recent decrease; the highest inbreeding levels correspondto the period from 1915 to 1944. Finally, intervalley differences (maximuminbreeding coefficient in the Tormes, minimum in the Tietar) are interpreted considering the geography, population size, and population mobility for each valley.

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Documento generato il 02/12/20 alle ore 07:53:57