experimental hybridization; sterility, fish physiology; allozymes, Barbus, Cyprinidae
Abstract :
[en] F1 hybrids were produced by crossing, in artificial conditions, female Barbus barbus and male Barbus meridionalis. Results from the genetic study describing enzymatic patterns produced after electrophoresis of experimental F1 hybrids confirmed a great part of the original interpretation of patterns observed in natural populations. Morphological studies which examined denticle length on the last hard ray of the dorsal fin (well developed in B. barbus and absent in B. meridionalis), showed that F1 hybrids values were not exactly intermediate between the parental values. Up to two years old, experimental hybrids displayed identical growth rates and sexual dimorphism of length (in favour of the females) as B. barbus growing in the same conditions. At this age, in female hybrids, the ovaries matured and produced fertilizable ovules ; in male hybrids, the testicles were morphologically normal but no sperm was produced. If this sterility is confirmed in the reciprocal cross (male B. barbus x female B. meridionalis), the phenomenon would be an essential feature in understanding this hybridization.
Disciplines :
Zoology
Author, co-author :
Philippart, Jean-Claude ; Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Biologie du comportement - Ethologie et psychologie animale
Berrebi, Patrick; Université de Montpellier > Institut des Sciences de l'Evolution > Laboratoire de Génétique
Language :
English
Title :
Experimental hybridization of Barbus barbus and Barbus meridionalis : physiological, morphological and genetic aspects
Publication date :
1990
Journal title :
Aquatic Living Resources
ISSN :
0990-7440
eISSN :
1765-2952
Publisher :
EDP Sciences, France
Volume :
3
Pages :
325-332
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
A printed version of this paper is available by mailing a demand to : jcphilippart@skynet.be
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