Concepedia

Author

Koichi HAGIYA

Hokkaido Agricultural Research CenterORCID

Also Known As

K. Hagiya, Koichi HAGIYA, Koichi Hagiya

62

Publications

330

Citations

10

H-Index

23

Concepts

All Affiliations

Hokkaido Agricultural Research CenterNational Livestock Breeding CenterObihiro University of Agriculture and Veterinary MedicineInstitute of Livestock and Grassland ScienceNihon University
KH

About

Koichi HAGIYA is an author at Hokkaido Agricultural Research Center specializing in lactation, livestock genetics, and animal science.

Top Concepts

#ConceptH-IndexPublicationsCitations

1

Medicine

4

4

111

2

Public Health

4

4

111

3

Biostatistics

2

2

43

4

Obstetrics

2

2

51

5

Nutrition

1

1

14

Koichi HAGIYA

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11

Publications

244

Citations

10

H-Index

YearCitations

Genetic correlations among female fertility, 305-day milk yield and persistency during the first three lactations of Japanese Holstein cows

Takeshi Yamazaki, Koichi HAGIYA, H. Takeda,

Livestock Science

2014

37

Genetic correlations between milk production traits and somatic cell scores on test day within and across first and second lactations in Holstein cows

Takeshi Yamazaki, Koichi HAGIYA, H. Takeda,

Livestock Science

2013

31

Effects of heat stress on production, somatic cell score and conception rate in Holsteins

Koichi HAGIYA, Kiyoshi Hayasaka, Takeshi Yamazaki,

Animal Science Journal

2016

31

Genetic characteristics of Japanese Holstein cows based on multiple-lactation random regression test-day animal models

Kenji Togashi, C.Y. Lin, Yamato Atagi,

Livestock Science

2007

29

Relationships between conception rate in Holstein heifers and cows and milk yield at various stages of lactation

Koichi HAGIYA, Y. Terawaki, Takeshi Yamazaki,

animal

2013

21

Genetic correlations between yield traits or days open measured in cows and semen production traits measured in bulls

Koichi HAGIYA, Takeshi Hanamure, Hisao Hayakawa,

animal

2017

21

Length of lags in responses of milk yield and somatic cell score on test day to heat stress in Holsteins

Koichi HAGIYA, Ikumi Bamba, Takefumi Osawa,

Animal Science Journal

2019

18

Genetic correlations between production and disease traits during first lactation in Holstein cows

Koichi HAGIYA, Takeshi Yamazaki, Y. Nagamine,

animal

2013

16

Genetic evaluation of the longevity of the Holstein population in Japan using a Weibull proportional hazard model

Osamu Sasaki, Mitsuo Aihara, Koichi HAGIYA,

Animal Science Journal

2011

16

Effects of stage of pregnancy on variance components, daily milk yields and 305-day milk yield in Holstein cows, as estimated by using a test-day model

Takeshi Yamazaki, Koichi HAGIYA, H. Takeda,

animal

2016

14

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