Lactation Persistency as a Component Trait of the Selection Index and Increase in Reliability by Using Single Nucleotide Polymorphism in Net Merit Defined as the First Five Lactation Milk Yields and Herd Life

Kenji Togashi1, Koichi Hagiya1, Takefumi Osawa2, Takatoshi Nakanishi2, Takeshi Yamazaki1, Yoshitaka Nagamine1, C.Y. Lin3, Shigeo Matsumoto1, Mitsuo Aihara1, Kiyoshi Hayasaka1
1NARO Hokkaido Agricultural Research Center, Hitsujigaoka 1, Toyohiraku, Sapporo, 062-8555, #N#Japan.
2National Livestock Breeding Center, Nishigo-mura, Nishishirakawa-gun, Fukushima, 961-8511, #N#Japan.
3Dairy and Swine Research and Development Centre, Agriculture and Agri-Food Canada , Quebec, J1M 1J3, Canada .

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