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Titolo:
THE ORIGIN AND EVOLUTION OF CLONES VERSUS THE MAINTENANCE OF SEX IN POECILIOPSIS
Autore:
VRIJENHOEK RC;
Indirizzi:
RUTGERS UNIV,CTR THEORET & APPL GENET NEW BRUNSWICK NJ 08903
Titolo Testata:
The Journal of heredity
fascicolo: 5, volume: 84, anno: 1993,
pagine: 388 - 395
SICI:
0022-1503(1993)84:5<388:TOAEOC>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
CLONALLY INHERITED GENOMES; ALL-FEMALE FISH; MITOCHONDRIAL-DNA; GENUS POECILIOPSIS; UNISEXUAL VERTEBRATES; GENETIC DISSECTION; PISCES-POECILIIDAE; LINKAGE ANALYSIS; POPULATIONS; COEXISTENCE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
67
Recensione:
Indirizzi per estratti:
Citazione:
R.C. Vrijenhoek, "THE ORIGIN AND EVOLUTION OF CLONES VERSUS THE MAINTENANCE OF SEX IN POECILIOPSIS", The Journal of heredity, 84(5), 1993, pp. 388-395

Abstract

Field and experimental studies of fish in the genus Poeciliopsis (Cyprinodontiformes: Poeciliidae) offer substantial insights into the origins, evolution, and ecology of clonal vertebrates. Recent molecular studies have clarified factors involved in the origins of diploid and triploid asexual lineages, and they provided evidence for a relatively ancient asexual lineage that has dispersed over great distances. The age of this lineage and perhaps other clones is sufficient for a ratchet-like mechanism to cause mutational deterioration. Recurrent origins of new clones from genetically variable sexual ancestors appears to be the driving force behind ecological diversification and the numerical success of unisexual populations. Genetic diversity also appears to play a role in the success of sexual populations. Discovery of a new sexual species that derived from a clonal lineage reveals an avenue of escape from the evolutionary dead end of asexuality.

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Documento generato il 19/09/20 alle ore 07:50:01