- Volume 47 Issue 3
DOI QR Code
Evaluation of calving interval and selection indices in Korean native cows
- Choi, Inchul (Division of Animal and Dairy Sciences, College of Agriculture and Life Sciences, Chungnam University) ;
- Lee, Dooho (Division of Animal and Dairy Sciences, College of Agriculture and Life Sciences, Chungnam University) ;
- Lee, Jong-Gwan (Livestock Experiment Institute) ;
- Lee, Seung-Hwan (Division of Animal and Dairy Sciences, College of Agriculture and Life Sciences, Chungnam University) ;
- Ryoo, Seung-Heui (Livestock Experiment Institute)
- Received : 2020.07.09
- Accepted : 2020.08.20
- Published : 2020.09.01
It is well known that intensive selection caused a decline in reproductive performance in dairy cattle. Interestingly, the reproductive performances including fertility and calving interval of Korean native beef cattle have declined in the last 20 years, suggesting that a breeding program focusing on carcass weight and intramuscular fat may affect the reproductive physiology in Korean native beef cattle, too. In this study, we analyzed the calving interval (CI) and selection index (SI) based on genome-wide association studies (GWAS) of Hanwoo cows for seven years (2013 - 2019). Multiparous cows (4.5 ± 0.11) were analyzed, which were bred by artificial insemination (AI). We first examined the distribution of the AIs and calving dates. About 40% of the AIs were carried out in May to June and October to December; subsequently, calving was observed from March to April and August to October, respectively, indicating the cows were seasonally bred. No correlation between CI and SI was found (y = 0.0459x - 17.64; R2 = 0.0356), but the ratio of cows with a positive SI was higher in the longer CI group compared to the shorter group, suggesting that the selection for meat quality and quantity may affect the reproductive performances. In addition, the average value of SI was - 3.42 in the CI < 400 while + 5.79 in the CI > 400 although the values were not statistically significant. However, our results suggest that reproductive indices such as fertility and CI should be considered for sustainability in the Hanwoo breeding selection program.
- Calus MPL, Meuwissen THE, Windig JJ, Knol EF, Schrooten C, Vereijken ALJ, Veerkamp RF. 2009. Effects of the number of markers per haplotype and clustering of haplotypes on the accuracy of QTL mapping and prediction of genomic breeding values. Genetics Selection Evolution 41:11. https://doi.org/10.1186/1297-9686-41-11
- Cho J, Do C, Choi I. 2016. Reproductive performance of Korean native cattle (Hanwoo) focusing on calving interval and parity. a31:273-279.
- Cho J, Do C, Song H, Choi I. 2015. An analysis of evaluation for Korean native cattle (Hanwoo) reproductive performance and cow-calf profitability. Journal of Embryo Transfer 30:189-193.
- Choi I, Cho J. 2016. Reproduction and marketing plans for improving profitability of Korean native cattle (Hanwoo) farm. Journal of Embryo Transfer 31:267-272.
- Cochran SD, Cole JB, Null DJ, Hansen PJ. 2013a. Discovery of single nucleotide polymorphisms in candidate genes associated with fertility and production traits in Holstein cattle. BMC genetics 14:49.
- Cochran SD, Cole JB, Null DJ, Hansen PJ. 2013b. Single nucleotide polymorphisms in candidate genes associated with fertilizing ability of sperm and subsequent embryonic development in cattle. Biology of reproduction 89:69.
- Jeong J, Lee SH, Choi I. 2019. The SNP of WBP1 is associated with heifer reproductive performance in the Korean native cattle Hanwoo. Korean Journal of Agricultural Science 46:27-31.
- Mucha A, Wierzbicki H, Kaminski S, Olenski K, Hering D. 2019. High-frequency marker haplotypes in the genomic selection of dairy cattle. Journal of Applied Genetics 60:179-186. https://doi.org/10.1007/s13353-019-00489-9
- Penagaricano F, Khatib H. 2012. Association of milk protein genes with fertilization rate and early embryonic development in Holstein dairy cattle. The Journal of dairy research 79:47-52. https://doi.org/10.1017/S0022029911000744
- Penagaricano F, Weigel KA, Khatib H. 2012a. Genome-wide association study identifies candidate markers for bull fertility in Holstein dairy cattle. Animal genetics 43:65-71. https://doi.org/10.1111/j.1365-2052.2012.02350.x
- Penagaricano F, Weigel KA, Rosa GJ, Khatib H. 2012b. Inferring quantitative trait pathways associated with bull fertility from a genome-wide association study. Frontiers in genetics 3:307.