Chromosomal pericentric inversion detected in a sow and her piglets.
Forty-four pigs with the suspicious symptoms of porcine stress syndrome (PSS) were selected for chromosome analysis. Cytogenetic evaluation by means of the G-banding technique revealed that one sow had an abnormal (38,XX, inv (1p+q-) (2.1;1.1) karyotype. The same abnormality was also detected in 8 of 13 offspring of this sow. However, there was no correlation between the chromosome abnormality and PSS. The chromosome abnormality did not give rise to a reduction in the fertility of this sow or in the viability of her offspring. This case represents the first reported instance of pericentric inversion in swine.
Miyake
Y I
YI
Laboratory of Theriogenology, Faculty of Agriculture Iwate University, Morioka 020, Japan.
Matsubara
T
T
Hata
M
M
Kaneda
Y
Y