Popescu Cp

Does ecosystem size determine aquatic bacteria richness? Reply

Isabel Reche, J.C. Meyran, Antoine Lecerf, Graham E. Forrester et autres

With the advent of DNA-based molecular technologies, microbial ecologists now have the tools to test whether general ecological patterns apply to microorganisms. In this study, we selected 11 high-mountain lakes from Sierra Nevada (Spain) to test the predictions of island-biogeography theory in …

fr (code pays fourni par la source)

[Stopping of chromosome condensation in the interspecific hybrid between common duck and Cairina moschata].

Tchelycheva La, Pierre Delpech, Popescu Cp, А. В. Родионов

The study of mitotic chromosomes from mule embryos at the 72-96 hour stage has shown that there is a blockage in the condensation of large regions of the small arms of the inherited number 1 parent chromosomes. Zones of decondensation on chromosomes …

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Heterosynapsis in two fertile but hypoprolific boars carriers of reciprocal translocations.

Halmat M. Jaafar, Alain Bouvet, O. Gabriel-Robez, Mathieu Bonneau et autres

The authors report here two new cases of reciprocal translocations in two fertile and hypoprolific boars. Silver stained synaptonemal complexes in surface-spread pachytene nuclei from a boar heterozygous for a reciprocal translocation, and from another one carrying two different reciprocal translocations, were …

fr (code pays fourni par la source)

[Two novel reciprocal translocations involving chromosome 6 in the domestic pig].

Mathieu Bonneau, Jeannine Boscher, Delate Jj, C. LEGAULT et autres

In the present study 2 new reciprocal translocations are described in two hypoprolific boars. The first one, a Gascon/Meishan boar, has produced a mean value of 7.37 +/- 0.69 piglets, vs 12.41 +/- 0.22 piglets per litter in contemporaries. The second one, …

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Flow cytometry of normal and abnormal pig karyotypes. Preliminary report.

F. Blaise, J Aycardi, Jeannine Boscher, Popescu Cp

Flow cytometry technique was applied to normal pig chromosomes and to three different reciprocal translocations: trcp (4q-; 14p), trcp (3p+;7q-) and trcp (1q-;15q+). The rearranged chromosomes generate new peaks which seem to correspond to their relative lengths. Therefore, it is necessary to …

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Synaptonemal complexes analysis in a bull carrying a 4;8 Robertsonian translocation.

Alain Bouvet, Popescu Cp, de Giovanni-Macchi, G. Colombo et autres

Synaptonemal complexes analysis was performed using electron microscopy on surface-spread spermatocytes of a bull heterozygous for the 4;8 Robertsonian translocation. In 19 cells examined, the longest autosomal complex showed kinetochores in a central position whereas the remaining autosomal complexes showed terminal kinetochores. …

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Cytogenetic evaluation of boars with a low prolificacy: two new types of chromosome translocation.

Popescu Cp, J. Boscher, Zhang Sq

Using the National Program for Sow Herd Management, two hypoprolific boars have been identified. The first one, a Large White, had produced on an average 7.2 piglets per litter in 24 litters. The second one, a Pietrain, had produced 6.11 piglets per …

fr (code pays fourni par la source)

The meiotic chromosomes of Creole cattle from Guadeloupe.

Anju Sharma, Popescu Cp

Assignment of MHC in swine to chromosome 7 by in situ hybridization and serological typing.

Claudine Geffrotin, Popescu Cp, Cribiu Ep, J. Boscher et autres

Mapping of the MHC in swine (SLA) was achieved by direct in situ hybridization to chromosome preparations. We took advantage of the fact that the cDNA probe coding for class I HLA-B7 antigen cross-hybridizes with swine genomic DNA. By nick-translation, 35S nucleotides …

[The frequency of chromosome abnormalities in farm animals and their economic consequences].

Popescu Cp, Michèle Tixier

Examinations during the last two decades of the chromosome complements of various species of domestic animals have revealed the existence of a considerable number of abnormalities, including inherited rearrangements: approximately 20 in cattle, 15 in pigs (predominantly reciprocal translocations), 3 in sheep, …

[Constitutive heterochromatin in normal and abnormal bovine karyotypes].

Popescu Cp

[Possible case of pericentric inversion in cattle].

Popescu Cp