Chromosomal abnormalities in hypoprolific boars.
Four new chromosomal rearrangements are reported in the domestic pig: 3 reciprocal translocations, rcp(4;12)(p13;q13) in a crossbred boar, rcp(1;7)(q17;q26) in a Large White purebred boar, rcp(1;6)(q17;q35) in a purebred synthetic paternal line boar, and a pericentric inversion inv(2)(p13q11) in a crossbred boar. The 1/7 reciprocal translocation and the pericentric inversion were detected in animals that had sired small litters. The effect of the 1/7 translocation was accurately determined: -4.5 piglets born per litter, i.e. -36%. Both the 1/6 and 1/7 reciprocal translocations were of maternal origin. All the chromosomal rearrangements were highlighted using GTG and/or RBG banding techniques. Chromosome painting experiments were also carried out to confirm the proposed hypotheses for the three reciprocal translocations.
Pinton
A
A
URA INRA-ENVT de Cytogénétique des Populations Animales, Toulouse, France.
Ducos
A
A
Berland
H
H
Seguela
A
A
Brun-Baronnat
C
C
Darré
A
A
Darré
R
R
Schmitz
A
A
Yerle
M
M
D000818:Animals; D002869:Chromosome Aberrations; D002871:Chromosome Banding; D007446:Chromosome Inversion; D017404:In Situ Hybridization, Fluorescence; D007621:Karyotyping; D008098:Litter Size; D008297:Male; D008677:Metaphase; D013552:Swine / Q000235:genetics*; D014178:Translocation, Genetic