Notizie preliminari sulla costituzione cariologica dell'ibrido intergenerico Salmo gairdneri X Salvelinus fontinalis (Pisces,Salmoniformes)

Stefano Cataudella; Maria Vittoria Civitelli; Nora Martinelli; Ernesto Capanna

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti (1975)

  • Volume: 58, Issue: 2, page 258-262
  • ISSN: 0392-7881

Abstract

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The chromosome complement of an experimental hybrid Salmo gairdneri X Salvelinus fontinalis has been investigated in 21 specimens. The chromosomes number has been demonstrated to vary both intrerindividually as well as within the different tissues of the same subject. The chromosome number ranges from 92 to 106 and the Fundamental numbers vary from 133 to 159. The morphological analysis of the hybrid karyotypes evidences that each complement is made up by one haploid set of Salvelinus fontinalis plus a variable quasidiploid number of Salmo gairdneri chromosomes. This karyological peculiarity has been hypothized to be the consequence of a former allotriploid complement of a hybrid syncarion resulting from the fusion of a non-reduced female Salmo gairdneri pronucleus with the haploid spermatozoon of Salvelinus fontinalis. This allotriploid complement has been supposed to be transformed throughout Robertsonian changes following the peculiar character of the Salmo gairdneri chromosomal pattern. Nevertheless the chromosome variability of Salmo gairdneri differs from that of the hybrids since in Salmo gairdneri Robertsonian changes produce balanced genoma only, whereas in the hybrids the genome portion related to Salmo gairdneri is affected by large losses of genetic material. New experimental approaches are planned in order to explain the problem of the karyological constitution of the Salmonidae intergeneric hybrids.

How to cite

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Cataudella, Stefano, et al. "Notizie preliminari sulla costituzione cariologica dell'ibrido intergenerico Salmo gairdneri X Salvelinus fontinalis (Pisces,Salmoniformes)." Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti 58.2 (1975): 258-262. <http://eudml.org/doc/291309>.

@article{Cataudella1975,
author = {Cataudella, Stefano, Civitelli, Maria Vittoria, Martinelli, Nora, Capanna, Ernesto},
journal = {Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti},
language = {ita},
month = {2},
number = {2},
pages = {258-262},
publisher = {Accademia Nazionale dei Lincei},
title = {Notizie preliminari sulla costituzione cariologica dell'ibrido intergenerico Salmo gairdneri X Salvelinus fontinalis (Pisces,Salmoniformes)},
url = {http://eudml.org/doc/291309},
volume = {58},
year = {1975},
}

TY - JOUR
AU - Cataudella, Stefano
AU - Civitelli, Maria Vittoria
AU - Martinelli, Nora
AU - Capanna, Ernesto
TI - Notizie preliminari sulla costituzione cariologica dell'ibrido intergenerico Salmo gairdneri X Salvelinus fontinalis (Pisces,Salmoniformes)
JO - Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti
DA - 1975/2//
PB - Accademia Nazionale dei Lincei
VL - 58
IS - 2
SP - 258
EP - 262
LA - ita
UR - http://eudml.org/doc/291309
ER -

References

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  1. CAPANNA, E., CATAUDELLA, S. e GENTILE DE FRONZA, T. (1973) - Some remarks on the karyotype of an intergeneric hybrid, Salmo trutta X Salvelinus fontinalis (Pisces: Salmoniformes), «Genetica», 44, 194-206. 
  2. SVÄRDSON, G. (1945) - Chromosome study on Salmonidae, «Rep. Inst. Freshwat. Res. Drottingholm», 23, 1-125. 
  3. MAYERS, L. (1971) - In M. L. Becak et al. (Editors), «Cromosome Atlas: Fish, Amphibians, Reptiles and Birds», Vol. I, Folio P-6 e P-7. Springer Verlag, New York. 
  4. OHNO, S., STENIUS, C., FAISST, E. e ZENZES, M. T. (1965) - Post-zygotic chromosomal rearrangements in Rainbow Trout (Salmo irideus Gibbons), «Cytogenetics», 4, 117-129. 
  5. CAPANNA, E., CATAUDELLA, S. e VOLPE, R. (1975) - Su di un ibrido intergenerico Salmo gairdneri X Salvelinus fontinalis (Pisces, Salmoniformes), «Boll. Pesca Piscic. Idrobiol.» in preparazione. 
  6. CAPANNA, E., CATAUDELLA, S. e VOLPE, R. (1971) - Osservazioni morfologiche e cariologiche su di un ibrido Salmo trutta X Salvelinus fontinalis, «Boll. Pesca Piscic. Idrobiol.», 26, 245-257. 
  7. HITOTSUMACHI, S., SASAKI, M. e OJIMA, Y. (1969) - Comparative karyotype study in several species of Japanese loaches (Pisces: Cobitidae), «Jap. J. Genetics», 44, 157-161. 

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