Sires' <i>MC1R</i> Genotypes and Coat Color of the Offspring of the Chikso (Korean Brindle Cattle)

Park, Jae-Hee; Lee, Chang-Woo; Lee, Hae-Lee; Choi, Jae Won; Choy, Yun Ho; Kwon, Anam; Ji, Yeoen Hee; Kim, Jong Gug

doi:10.12750/jet.2014.29.1.21

Cited by 2 publications

(1 citation statement)

References 15 publications

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“…However, Chikso improvement has always been implemented as small-scale regional district level improvement projects, never a nationwide project [7,8]. The researches on Chikso mainly focused on genes affecting the coat color [9,10] and how to increase black streaks on the coat [11,12]. Although research on performance improvement in Chikso has not occurred yet, Hanwoo has been studied at the national level to improve beef cuts as well as carcass weight (CW) and intramuscular fat [13].…”

Section: Introductionmentioning

confidence: 99%

Estimation of environmental effects and genetic parameters of carcass traits on Chikso (Korean brindle cattle)

Park

Choi

Park

et al. 2020

Asian-Australas J Anim Sci

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Objective: The purpose of this study was i) to identify the characteristics of carcass traits in Chikso by gender, region, age at slaughter, and coat color using the carcass data collected from the nationwide pedigree information and coat color investigation, and ii) to estimate genetic parameters for breed improvement.Methods: A linear model was used to analyze the environmental effects on the carcass traits and to estimate genetic parameters. Analysis of variance was performed using TYPE III sum of squares for the unbalanced data provided by the general linear model procedure. Variance components for genetic parameters was estimated using REMLF90 of the BLUPF90 family programs.Results: Phenotypic performance of carcass weight (CW), eye muscle area (EMA), and backfat thickness (BF) in Chikso were lower than those of Hanwoo. This is a natural outcome because Hanwoo have undergone significant efforts for improvement at the national level, a phenomenon not observed in Chikso. Another factor influencing the above outcome was the smaller population size of Chikso compared to that of Hanwoo’s. The heritabilities of CW, EMA, BF, and marbling score in Chikso were estimated as 0.50, 0.37, 0.35, and 0.53, respectively, which were was higher than those of Hanwoo.Conclusion: Based on the genetic parameters that were estimated in this study, it is expected that the carcass traits will improve when the livestock research institutes at each province conduct small-scale performance tests and the semen is provided to farmers after selecting proven bulls using the state-of-art selection technique such as genomic selection.

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Section: Introductionmentioning

confidence: 99%

Estimation of environmental effects and genetic parameters of carcass traits on Chikso (Korean brindle cattle)

Park

Choi

Park

et al. 2020

Asian-Australas J Anim Sci

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Genome-wide analysis of Hanwoo and Chikso populations using the BovineSNP50 genotyping array

et al. 2018

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Hanwoo and Chikso are classified as Korean native cattle breeds that are currently registered with the Food and Agriculture Organization. However, there is still a lack of genomic studies to compare Hanwoo to Chikso populations. The objective of this study was to perform genome-wide analysis of Hanwoo and Chikso populations, investigating the genetic relationships between these two populations. We genotyped a total of 319 cattle including 214 Hanwoo and 105 Chikso sampled from Gangwon Province Livestock Technology Research Institute, using the Illumina Bovine SNP50K Beadchip. After performing quality control on the initially generated datasets, we assessed linkage disequilibrium patterns for all the possible SNP pairs within 1 Mb apart. Overall, average r values in Hanwoo (0.048) were lower than Chikso (0.074) population. The genetic relationship between the populations was further assured by the principal component analysis, exhibiting clear clusters in each of the Hanwoo and Chikso populations, respectively. Overall heterozygosity for Hanwoo (0.359) was slightly higher than Chikso (0.345) and inbreeding coefficient was also a bit higher in Hanwoo (- 0.015) than Chikso (- 0.035). The average F value was 0.036 between Hanwoo and Chikso, indicating little genetic differentiation between those two breeds. Furthermore, we found potential selection signatures including LRP1B and NTRK2 genes that might be implicated with meat and reproductive traits in cattle. In this study, the results showed that both Hanwoo and Chikso populations were not under severe level of inbreeding. Although the principal component analysis exhibited clear clusters in each of the populations, we did not see any clear evidence that those two populations are highly differentiated each other.

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Sires' MC1R Genotypes and Coat Color of the Offspring of the Chikso (Korean Brindle Cattle)

Cited by 2 publications

References 15 publications

Estimation of environmental effects and genetic parameters of carcass traits on Chikso (Korean brindle cattle)

Estimation of environmental effects and genetic parameters of carcass traits on Chikso (Korean brindle cattle)

Genome-wide analysis of Hanwoo and Chikso populations using the BovineSNP50 genotyping array

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