Breeding programs of Japanese Black cattle in Agura Farm

1 Breeding History of Japanese Beef Cattle and Preservation of Genetic Resources as Economic Farm Animals

INTRODUCTION Modern beef cattle used for our beef production are not exactly a property left by our ancestors, but composed products from native and imported cattle. Most native cattle were graded up by British and continental breeds for a few generations about 90 years ago. It should be pointed out, however, that they are the sole domestic farm animals in our country contributing to practical ...

Optic pathway degeneration in Japanese black cattle

Degeneration of the optic pathway has been reported in various animal species including cattle. We experienced a case of bilateral optic tract degeneration characterized by severe gliosis in a Japanese black cattle without any obvious visual defects. To evaluate the significance, pathological nature and pathogenesis of the lesions, we examined the optic pathway in 60 cattle (41 Japanese black, ...

Evaluation of Dairy Cattle Breeding Programs: Specialized Milk Production

A case of diabetes mellitus in Japanese Black cattle.

A 3 year-old female Japanese Black cattle was diagnosed as diabetes mellitus (DM). Hyperglycemia (295 mg/dl), increase of serum fructosamine (487 micromol/l), elevated glycosylated hemoglobin A1 (GHbA1; 10.9%), low concentration of serum insulin (< 1.0 microU/ ml), increased serum glucagon (399 pg/ml), and glucose intolerance (glucose disappearance rate; k=0.53) were noted. On the histopatholog...

Application of myostatin in sheep breeding programs: A review

Myostatin or growth and differentiation factor 8 (GDF8), has been known as the factor causing double muscling phenotypes in which a series of mutations make the myostatin protein inactive, hence disabling it to regulate the deposition of muscle fibre. This phenotype happens with high frequency in a breed of sheep known as the Texel. Quantitative trait loci (QTL) studies show that a portion of t...