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Titolo:
SELFING, SEXUAL POLYMORPHISM AND MICROSATELLITES IN THE HERMAPHRODITIC FRESH-WATER SNAIL BULINUS-TRUNCATUS
Autore:
VIARD F; DOUMS C; JARNE P;
Indirizzi:
UNIV MONTPELLIER 2,INST SCI EVOLUT,LAB GENET & ENVIRONM,CC 065 F-34095 MONTPELLIER 05 FRANCE
Titolo Testata:
Proceedings - Royal Society. Biological Sciences
fascicolo: 1378, volume: 264, anno: 1997,
pagine: 39 - 44
SICI:
0962-8452(1997)264:1378<39:SSPAMI>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
CORRELATED MATINGS; OUTCROSSING RATE; ANIMALS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
25
Recensione:
Indirizzi per estratti:
Citazione:
F. Viard et al., "SELFING, SEXUAL POLYMORPHISM AND MICROSATELLITES IN THE HERMAPHRODITIC FRESH-WATER SNAIL BULINUS-TRUNCATUS", Proceedings - Royal Society. Biological Sciences, 264(1378), 1997, pp. 39-44

Abstract

Studies on the evolution of self-fertilization and sexual polymorphisms (the co-occurrence of several sexual morphs in a species) have focused on plants. Aphally, a sexual polymorphism occurring in gastropods,offers the opportunity to extend study of these issues to animals. Wepresent progeny-array analyses of the selfing rate and correlated matings in the tropical freshwater snail Bulinus truncatus. This study isbased on 447 offspring originating from 57 families and five natural populations. To overcome the lack of allozyme polymorphism, four polymorphic microsatellite markers were used. Selfing rates higher than 78%, were detected in all populations, and no correlation with the aphally ratio (the proportion of individuals lacking the male copulatory organ per population) was evident. Outcrossing was detected in 17 families only, and individual outcrossing rates were variable and did not depend on the sexual morph of the mother. These results illustrate the power of microsatellites for detailed genetic studies, indicate that high selfing rates may have a strong genetic basis, and unexpectedly suggest that phally polymorphism may be neutral with respect to selfing.

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Documento generato il 26/11/20 alle ore 14:17:53