Estimation of genetic parameters for reproductive traits in Korean dairy cattle
Objective In Korea, dairy cattle breeding programs have historically prioritized productive, conformation traits, leading to positive improvements, yet reproductive traits have lagged in development. This study was conducted to develop the breeding program of key reproductive traits in the Korean da...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Asian-Australasian Association of Animal Production Societies
2025-01-01
|
| Series: | Animal Bioscience |
| Subjects: | |
| Online Access: | http://www.animbiosci.org/upload/pdf/ab-24-0455.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841563069097967616 |
|---|---|
| author | Jae-Gu Lee Jeongwoo Seo Mahboob Alam Hyungjun Song Seokhyun Lee Joohyeon Cho Chang-Gwon Dang Joonho Lee |
| author_facet | Jae-Gu Lee Jeongwoo Seo Mahboob Alam Hyungjun Song Seokhyun Lee Joohyeon Cho Chang-Gwon Dang Joonho Lee |
| author_sort | Jae-Gu Lee |
| collection | DOAJ |
| description | Objective In Korea, dairy cattle breeding programs have historically prioritized productive, conformation traits, leading to positive improvements, yet reproductive traits have lagged in development. This study was conducted to develop the breeding program of key reproductive traits in the Korean dairy cattle population. Methods Utilizing data from 7,596 farms and over seven million observations, we conducted quality control to rectify manual entry errors and selected traits in line with international genetic evaluation standards. Traits analyzed included heifer conception rate (HCR), interval from calving to first insemination (CF), cow conception rate (CCR), interval from first to last insemination (FL), and days open (DO). Genetic parameters were estimated using a single trait animal model for HCR and a multiple lactation animal model for CF, CCR, FL, and DO, considering contemporary group of herd-insemination year, insemination month, and monthly age as fixed effects. Results Results showed low heritability estimates, ranging from 0.007 to 0.035 across different traits and lactations. Theoretical reliability appears to be low on average due to the influence of heritability, but it showed sufficiently high reliability in some sires (over 0.8). In terms of genetic and phenotypic trends, capacity for reproductive traits declined for a long time until around 2014. In recent individuals, improved trend can be found. Conclusion This study addressed the critical need for enhancing reproductive efficiency to complement the existing breeding goals, thereby supporting sustained economic viability in the dairy industry. The results underscore the need for improved data quality and methodological adjustments for reproduction records to enhance the genetic evaluation of dairy cattle in Korea. |
| format | Article |
| id | doaj-art-a31ec202e4824f6cbb49255de162df6f |
| institution | Kabale University |
| issn | 2765-0189 2765-0235 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Asian-Australasian Association of Animal Production Societies |
| record_format | Article |
| series | Animal Bioscience |
| spelling | doaj-art-a31ec202e4824f6cbb49255de162df6f2025-01-03T00:24:05ZengAsian-Australasian Association of Animal Production SocietiesAnimal Bioscience2765-01892765-02352025-01-01381334010.5713/ab.24.045525357Estimation of genetic parameters for reproductive traits in Korean dairy cattleJae-Gu Lee0Jeongwoo Seo1Mahboob Alam2Hyungjun Song3Seokhyun Lee4Joohyeon Cho5Chang-Gwon Dang6Joonho Lee7 Animal Breeding and Genetics Division, National Institute of Animal Science, Rural Development Administration, Cheonan 31000, Korea GeneApps Co., Ltd., Seoul 06105, Korea Animal Breeding and Genetics Division, National Institute of Animal Science, Rural Development Administration, Cheonan 31000, Korea Dairy Cattle Improvement Center of NH-Agri Business Group, National Agricultural Cooperative Federation, Goyang 10292, Korea Dairy Cattle Improvement Center of NH-Agri Business Group, National Agricultural Cooperative Federation, Goyang 10292, Korea Dairy Cattle Improvement Center of NH-Agri Business Group, National Agricultural Cooperative Federation, Goyang 10292, Korea Animal Breeding and Genetics Division, National Institute of Animal Science, Rural Development Administration, Cheonan 31000, Korea GeneApps Co., Ltd., Seoul 06105, KoreaObjective In Korea, dairy cattle breeding programs have historically prioritized productive, conformation traits, leading to positive improvements, yet reproductive traits have lagged in development. This study was conducted to develop the breeding program of key reproductive traits in the Korean dairy cattle population. Methods Utilizing data from 7,596 farms and over seven million observations, we conducted quality control to rectify manual entry errors and selected traits in line with international genetic evaluation standards. Traits analyzed included heifer conception rate (HCR), interval from calving to first insemination (CF), cow conception rate (CCR), interval from first to last insemination (FL), and days open (DO). Genetic parameters were estimated using a single trait animal model for HCR and a multiple lactation animal model for CF, CCR, FL, and DO, considering contemporary group of herd-insemination year, insemination month, and monthly age as fixed effects. Results Results showed low heritability estimates, ranging from 0.007 to 0.035 across different traits and lactations. Theoretical reliability appears to be low on average due to the influence of heritability, but it showed sufficiently high reliability in some sires (over 0.8). In terms of genetic and phenotypic trends, capacity for reproductive traits declined for a long time until around 2014. In recent individuals, improved trend can be found. Conclusion This study addressed the critical need for enhancing reproductive efficiency to complement the existing breeding goals, thereby supporting sustained economic viability in the dairy industry. The results underscore the need for improved data quality and methodological adjustments for reproduction records to enhance the genetic evaluation of dairy cattle in Korea.http://www.animbiosci.org/upload/pdf/ab-24-0455.pdfgenetic correlationheritabilitykorean holstein cattlemultiple lactation animal modelreproductive traits |
| spellingShingle | Jae-Gu Lee Jeongwoo Seo Mahboob Alam Hyungjun Song Seokhyun Lee Joohyeon Cho Chang-Gwon Dang Joonho Lee Estimation of genetic parameters for reproductive traits in Korean dairy cattle Animal Bioscience genetic correlation heritability korean holstein cattle multiple lactation animal model reproductive traits |
| title | Estimation of genetic parameters for reproductive traits in Korean dairy cattle |
| title_full | Estimation of genetic parameters for reproductive traits in Korean dairy cattle |
| title_fullStr | Estimation of genetic parameters for reproductive traits in Korean dairy cattle |
| title_full_unstemmed | Estimation of genetic parameters for reproductive traits in Korean dairy cattle |
| title_short | Estimation of genetic parameters for reproductive traits in Korean dairy cattle |
| title_sort | estimation of genetic parameters for reproductive traits in korean dairy cattle |
| topic | genetic correlation heritability korean holstein cattle multiple lactation animal model reproductive traits |
| url | http://www.animbiosci.org/upload/pdf/ab-24-0455.pdf |
| work_keys_str_mv | AT jaegulee estimationofgeneticparametersforreproductivetraitsinkoreandairycattle AT jeongwooseo estimationofgeneticparametersforreproductivetraitsinkoreandairycattle AT mahboobalam estimationofgeneticparametersforreproductivetraitsinkoreandairycattle AT hyungjunsong estimationofgeneticparametersforreproductivetraitsinkoreandairycattle AT seokhyunlee estimationofgeneticparametersforreproductivetraitsinkoreandairycattle AT joohyeoncho estimationofgeneticparametersforreproductivetraitsinkoreandairycattle AT changgwondang estimationofgeneticparametersforreproductivetraitsinkoreandairycattle AT joonholee estimationofgeneticparametersforreproductivetraitsinkoreandairycattle |