With the development of Korean economy, demand for high-quality beef, specifically Hanwoo is escalating, with marbling traits—measured by widely used score—being a key contributor to meat palatability. The differences between and lower-quality meat, according satisfaction customers, are not result from only degree but also delicacy flecks distribution. Using computer analysis technique, an index quantifying fineness 256 sirloin cuts at 12 th – 13 thoracic vertebra named F7 was developed in...

Objective This study estimated the genetic parameters for body weight gain and growth curve parameter traits in Korean native chicken (KNC). Methods A total of 585 F1 chickens were used along with 88 their F0 birds. Body weights measured every 2 weeks from hatching to 20 age measure at 2-week intervals. For each individual, a logistic model was fitted longitudinal dataset obtain three (α, asymptotic final weight; β, inflection point; γ, constant scale that proportional overall rate). Genetic...

This study aimed to identify genetic associations with carcass traits in Hanwoo cattle using a genome-wide association study. A total of 9302 phenotypes were analyzed, and all animals genotyped the Illumina Bovine 50K v.3 SNP chip. Heritabilities for weight (CWT), eye muscle area (EMA), backfat thickness (BF), marbling score (MS) estimated as 0.42, 0.36, 0.47, respectively, GBLUP model, 0.37, Bayes B model. We identified 129 common SNPs DGEBV 118 GEBV on BTA6, BTA13, BTA14, suggesting their...

The Korean native chicken (KNC) is believed to have existed in the Peninsula more than 1,400 years ago. Since then, KNC been bred only by private farmers rural areas of Korea. In 1994, a conservation program was established government and, as result, five lines were restored. are considered unique taste and texture that attractive consumers meat from commercial broilers. However, price relatively high, which mainly due breed's low growth rate, hence limitations for industrial applications....

Abstract Indigenous Korean breeds such as Hanwoo (Korean) cattle have adapted to their local environment during the past 5000 years. In 1980s, National Genetic Improvement Program was established develop a modern economic breed for beef production in Korea through artificial selection. This process is thought altered genomic structure of breeding traits over time. The detection genetic variants under selection could help elucidate mechanism breeds. response natural and 40-year program. We...

Conducting genome-wide association studies (GWAS) for reproductive traits in Hanwoo cattle, including age at first calving (AFC), interval (CI), gestation length (GL), and number of artificial inseminations per conception (NAIPC), is paramount significance. These analyses provided a thorough exploration the genetic basis these traits, facilitating identification key markers targeted trait improvement. Breeders can optimize their selection strategies, leading to more efficient sustainable...

Temperature increases due to climate change induce heat stress in livestock, resulting economic losses for farmers. This study investigated the physiological responses of Hanwoo cattle stress, and effects on vaginal microbiome. Four cows (mean weight: 380.3 ± 37.5 kg, parity: 2.5 1.0) were allocated two groups: (temperature-humidity index (THI) 86: 33 °C, 70% humidity) no (THI 67: 20 60% humidity). The exposed these conditions 15 days, was repeated twice with same cohort animals, ensuring...

We aimed to verify the impacts of cellulose/chitosan addition on physicochemical properties sausages. Sausages were prepared using 3% cellulose or chitosan and compared with those without biopolymers (control). containing exhibited decreased pH values (p< 0.05), whereas increased values. TBARS (2-thiobarbituric acid reactive substances) did not differ between control biopolymer samples. The samples had lower VBN contents than after 4 weeks storage (p<0.05). significantly reduced...

Maternal overnutrition and targeted supplements during pregnancy strongly affect fetal development in beef cattle, influencing gene expression, tissue development, productivity after birth. As modern feeding practices often result cows receiving energy protein above requirements, understanding the balance between adequate nutrition overconditioning is critical for sustainable production. This review synthesizes findings from recent studies on maternal supplementation, focusing macronutrients...

The melanocortin 1 receptor (MC1R) gene is related to the plumage color variations in chicken. Initially, MC1R from 30 individuals was sequenced and nine polymorphisms were obtained. Of these, three six single nucleotide (SNPs) confirmed as synonymous nonsynonymous mutations, respectively. Among selected SNPs genotyped using restriction fragment length polymorphism (RFLP) method 150 five chicken breeds, which identified responding alleles. neighbor-joining phylogenetic tree sequences...

Shank skin color of Korean native chicken (KNC) shows large variations. It varies from white, yellow, green, bluish or grey to black, whilst in the majority European breeds shanks are typically yellow-colored. Three shank color-related traits (i.e., lightness [L*], redness [a*], and yellowness [b*]) were measured by a spectrophotometer 585 progeny 68 nuclear families KNC resource population. We performed genome scan linkage analysis identify loci that affect quantitatively KNC. All these...

The Hanwoo traceability system currently utilizes 11 dinucleotide repeat microsatellite (MS) markers. However, markers are known to have a high incidence of polymerase chain reaction (PCR) artifacts, such as stutter bands, which can complicate the accurate reading alleles. In this study, we examined polymorphisms MS employed in systems. Additionally, explored four trinucleotide and one tetranucleotide marker sample 1,106 cattle. We also assessed potential utility tri- polymorphic information...

continues to grow.This is because the abilities of both sire and dam are important for producing superior calves.In Korea,

This study aimed to predict the accuracy of genomic estimated breeding values (GEBVs) for reproductive traits in Hanwoo cows using GBLUP, BayesB, BayesLASSO, and BayesR methods. Accuracy estimates GEBVs were derived through fivefold cross-validation, analyzing a dataset comprising 11,348 animals employing an Illumina Bovine 50K SNP chip. GBLUP showed 0.26 AFC, while demonstrated 0.28, 0.29, respectively. For CI, attained 0.19, whereas scored 0.21, 0.24, 0.25, The GL was uniform across at...

Table S1 Descriptive statistics for fatty acid composition in Korean native chicken meat (%). S2 Allele and genotype frequencies of the nine SNPs six candidate genes. S3 Haplotype haplotype three S4 Effects genes on composition. Figure SNP × interactions thigh meat. breast Please note: The publisher is not responsible content or functionality any supporting information supplied by authors. Any queries (other than missing content) should be directed to corresponding author article.

Fatty acid composition is one of the most important meat quality traits because it can contribute to functional, sensorial, and nutritional factors. In this study, quantitative trait locus (QTL) analyses for fatty were investigated in thigh breast Korean native chicken (KNC).In total, 18 from each sample using 83 parents, 595 F1 chicks 20 week old. Genotype assessment was performed 171 informative DNA markers on 26 autosomes. The KNC linkage map constructed by CRI-MAP software, which...

Hematological reference intervals must consider several parameters, including genotype, age, sex, management, and analytic process. Work is needed to evaluate hematological changes specifically in Hanwoo calves according calf sex. Therefore, this study, we sought confirm the complete blood cell count (CBC) calves, monitor hematologic values from birth until 28 weeks of life, compare male female calves. A total 35 was studied. Calf sampled at multiple time age (including within 6 h 2 days, 7...

Previous studies demonstrated that polymorphisms in the μ-calpain (CAPN1) and calpastatin (CAST) genes had significant effects on meat tenderness different cattle populations. The aim of this study was to validate potential association seven single nucleotide (SNPs) harbored these two candidate with Longissimus thoracis (LT) Semimembranosus (SM) muscles. A total 1000 animals were genotyped using TaqMan SNP genotyping arrays, muscle (LT SM at 7 days post-slaughter) assessed based...

닭은 전체 염기서열의 길이가 포유류에 비해 3분의 1 정도로 비교적 작은 유전체를 가지고 있기 때문에 인간의 주요한 단백질 공급원으로써의 중요성뿐 아니라, 동물의 형질연관 유전자 연구 및 발생유전학적 연구에 좋은 모델 동물이다. 따라서 본 연구에서는 한국재래닭 이용성을 증대시키는 목적으로 한국재래닭의 유전적 구조를 이해하고, 다양한 응용연구의 토대를 마련하기 위하여 131개의 microsatellite (MS) 마커와 8개의 SNP 마커 유전자형을 이용하여 연관지도를 작성하였다. 그 결과, 유전 연관지도의 총 길이는 2729.4 cM으로 확인되었고, 연관지도 작성에 사용된 각 간의 거리는 평균 19.64 계산되었다. 모든 마커의 거리와 물리적 거리의 순서는 GGA8의 ADL0278과 MCW0351의 순서가 바뀐 결과만 제외하고, 이전의 연구결과와 매우 유사한 결과를 나타내었다. 또한 macrochromosome과 microchromosome의 재조합률을 비교해...

Sung-Sik Kang, Sang-Rae Cho, Ui-Hyung Kim, Yonghwan Seok-Dong Lee, Myung-Suk Eunju Jeong-Il Won, Shil Jin, Hyoun-Ju Sungwoo Sun-Sik Jang and Seunghoon Lee. Journal of Animal Reproduction Biotechnology 2024;39:40-7. https://doi.org/10.12750/JARB.39.1.40