A new reciprocal translocation in a hypoprolific boar

Abstract

In France, boars are classified by the National Program for Sow Herd Managmenet, according to the size of litters produced. All boars with an average of less than 8 live-born piglets, from at least 6 litters, are cytogenetically examined. Since 1979, three different reciprocal translocations have been identified by our laboratory in the hypoprolific group. A new fourth reciprocal translocation, not hitherto described, has just been found. The carrier Landrace boar had produced an average 7.2 +/- 2.65 piglets in 24 litters, i.e. a 31.23 % reduction of prolificacy. This animal is carrying a new reciprocal translocation involving the smal acrocentrics, nb. 16 and 17. the animal production and economic consequences of the chromosomal abnormalities are discussed.