809
Effects of Four Gene Polymorphisms related to Fertility on Milk Production and Calving Ability in Japanese Holsteins

Tuesday, August 19, 2014
Posters (The Westin Bayshore)
Takayoshi Kawahara , Holstein Cattle Association of Japan, Hokkaido Branch, Sapporo, Hokkaido, Japan
Yusaku Gotoh , Holstein Cattle Association of Japan, Hokkaido Branch, Sapporo, Hokkaido, Japan
Mayumi Sugimoto , National Livestock Breeding Center, Odakura, Nishigo, Fukushima, Japan
Toshimi Baba , Holstein Cattle Association of Japan, Hokkaido Branch, Sapporo, Hokkaido, Japan
Satoshi Yamaguchi , Hokkaido Dairy Milk Recording and Testing Association, Sapporo, Hokkaido, Japan
Mitsuyoshi Suzuki , Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido, Japan
Yoshikazu Sugimoto , Shirakawa Institute of Animal Genetics, Odakura, Nishigo, Fukushima, Japan
Abstract Text:

We investigated the association between the gene polymorphisms on PKP2, CTTNBP2NL, SETD6 and CACNB2 and fertility, milk production, and calving ability of Holsteins in Japan. The genotype effects of the four genes were estimated to be significantly positive on conception rate (CR) and significantly negative on milk production. The genotype effects of PKP2, CTTNBP2NL and CACNB2 on calving difficulty were significantly positive. The genotype effects of CTTNBP2NL, SETD6 and CACNB2 on decreasing stillbirths were significantly negative. These results suggest that selection to increase the frequencies of allele that indicate high CR for the four genes leads to an increase in calving difficulty with a decrease in milk production as well as the indirect response of decreasing stillbirths.

Keywords:

gene polymorphism

fertility

milk production

calving ability

Holsteins

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