Monosomy X and gonadal dysgenesis in a buffalo heifer (Bubalus bubalis).
Investigations on a 3-yr-old river buffalo heifer presenting anestrus revealed a chromosome make-up of 2n=49 in the lymphocyte cultures, compared with the 2n=50 characteristic of riverine buffalo. The missing chromosome was identified as one of the Xs by karyotypic analysis, and monosomy X was confirmed by C and G-banding techniques. Both ovaries of the heifer were underdeveloped, although the other components of the internal genitalia were normal. The phenotypic and karyotypic features confirmed this to be a case of ovarian dysgenesis with 49,XO karyotype similar to that of the Turner's syndrome in man and other mammals.
Yadav
B R
BR
National Institute of Animal Genetics, NDRI Campus, Karnal - 132 001, India.
Kumar
P
P
Tomer
O S
OS
Kumar
S
S
Balain
D S
DS