Genetic improvement of Japanese black cattle breeding cows in Yamaguchi Prefecture
2019
Ohmoto, Y. | Yamamoto, K.
We analyzed the ancestry, body metrics and other characteristics, and efficiency of meat production in breeding cows of Japanese black cattle in Yamaguchi prefecture. We then examined the breeding criteria used in the original and improved cattle production system. Similar to survey results gained three years ago, our pedigree analysis indicated that "Hirashigekatsu" (sire bull) fathered most of the offspring, but this proportion was less than from three years ago. Other pedigree data showed that the proportion of relatively young bulls increased, as did the population of breeding cows. System configuration survey data was not significantly different from data obtained three years ago. "Tottori type" breeding cows were generally superior to the other types in all body characteristics and in meat production. Based on body characteristics and meat production analysis, new breeding criteria and fattening strategies for cattle production were developed.
Показать больше [+] Меньше [-]