Production Performance of 12 Korean Domestic Chicken Varieties Preserved as National Genetic Resources

This study compares the physicochemical characteristics and fatty acid composition of three Korean native chickens and broilers. Ten whole raw broiler chickens and ten each from the three Korean native chickens (KNCs), Hanhyup 3 (HH3), Woormatdak 1 (WRMD1), and Woormatdak 2 (WRMD2), were purchased from the meat market. Their breast and thigh meat were used as samples. The proximate composition, pH, color, water-holding capacity (WHC), shear force, collagen content, and fatty acid composition were determined. In breast meat, the moisture content of HH3 (74.94%) and WRMD1 (74.74%) was lower than that of the broilers (77.1%, P<0.05). No significant difference was found in crude protein, lipids, and ash contents. The crude fat from thigh meat from HH3 and WRMD2 was lower than that of broilers (P<0.05). The redness of WRMD1 was the highest in both breast and thigh meat (P<0.05). The WHC of the breast meat of WRMD1 was lower than that of HH3 and WRMD2. In thigh meat, the WHC of the broilers was significantly higher than that of the KNCs. In breast meat, the shear force of WRMD2 was significantly lower than that of the broilers, HH3, and WRMD1, while no significant difference was found in thigh meat. The collagen content and arachidonic acid levels of the KNCs were significantly higher than those of the broilers for breast and thigh meats. No significant differences were observed among the KNCs. This result can be used to improve the quality of KNC but further studies on the bioactive compounds, taste, and volatile compounds of KNCs are required.

unclassified

Comparative Analysis of Physicochemical Traits and Fatty Acid Composition of Chicken Meat from New Strain of Korean Native Chickens

Shin¹,

Kim²,

Kwon³

et al. 2021

“…특히, 이들 간 이원교잡 시험 (Kang et al, 2012;Lee et al, 2013;Lee et al, 2014) 및 삼원 교잡 시험 (Park et al, 2010)이 중점적으로 시도되었다. 교잡 결과, 잡종 개체들의 생산능력이 순계에 비해 월등히 우수 한 성적을 보인다고 하였는데, 순계의 경우 12주령 체중이 황갈색 및 적갈색 재래종은 1.1 kg 전후이고, 토착 육용종의 경우 2.2 kg 정도이며, 토착 겸용종은 1.2 kg 정도로 보고한 반면 (Kim et al, 2019), 동일 연령에서 이들 간 이원교잡종 은 1.5∼1.6 kg (Kang et al, 2012;Lee et al, 2013), 삼원교잡 종은 2.5∼2.6 kg (Park et al, 2010)…”

unclassified

Crossbreeding Combination Test for the Production of New Synthetic Korean Native Commercial Chickens

Sohn¹,

Choi²,

Cho³

et al. 2021

Self Cite

In this study, we performed a cross-combination test using offspring from two paternal and five maternal parent stock lines to produce a new synthetic breed of Korean native commercial chickens. The survival rate, body weight, feed intake, and feed efficiency were measured for 10 crosses, with 837 Hanhyup-3 chickens used as a control. Most chickens had brown-based feathers, and there was little difference in color phenotypes among combinations. The average survival rate of the combinations was 94.9%, which was significantly different from that of Hanhyup-3 at 75.3% (P<0.01). There was significant differences in body weight among the combinations at all weeks of age (P<0.01). At 10 weeks of age, the FHHY combination was the heaviest with 2,300 g, while the weight of Hanhyup-3 was 1,922 g. In addition, the weight difference between the male and female chickens was 458 g. As a result of regression analysis, the duration needed to reach 1.9 kg was about 61 days for the FHFY, FHHY, and HFFY combinations, and 70 days for Hanhyup-3, exhibiting a 9-day difference. The average feed conversion ratio of the combinations until 10 weeks was 2.42, which was significantly different from that of Hanhyup-3 at 2.97 (P<0.01). In conclusion, FHHY, FHFY, and HFFY were determined to be the best new breed combinations based on production capacity. When these combinations are used as new commercial breeds, they are expected to increase the average weight by 18% and improve feed efficiency by 19%, as compared to the existing Hanhyup-3 breed.

“…국립축산과학원은 토종닭 순계를 복원 및 보존한 이래 토 종닭의 순계 (Kim et al, 2019), 종계 (Kang et al, 1997;Kim et al, 2012;Hong et al, 2012;Lee et al, 2014;Choi et al, 2017) 및 실용계 (Kang et al, 2010;Park et al, 2010;Kang et al, 2011)…”

unclassified

Comparison of Body Weight and Egg Production Ability across Nine Combinations of Korean Indigenous Chicken Breeds

Kim¹,

Park²,

Im-Gi³

et al. 2021

Self Cite

The present study investigated production traits, including body weight, egg production, egg weight, and egg quality in Korean indigenous parent stocks. Parent stocks produced from a nine-combination association from five pure line strains (C, D, F, K, and Y) were used. The body weight analyses results showed that the CY combination had the highest body weight (1,604.9 g) and the DK combination had the lowest (1,424.4 g). The average age at first egg of the nine combinations was 118.6 days; however, that of the YD combination was 111.6 days, making it the fastest growing combination, whereas the DK combination was the slowest, at 126 days. Hen-day egg production was 74% or more for the CF, CK, and DK combinations. The DK combination hens showed excellent persistence in egg laying. Hen-housed egg production exhibited results similar to those of hen-day egg production. Egg weight was significantly higher in the DK combination than in the other combinations and was observed to increase from 20 (43.9 g) to 40 (58.1 g) weeks. The egg quality analyses results showed that the combinations based on the F and K strains had a bright eggshell color, with relatively high egg weights. Eggshell strength and thickness were the highest in the DK combination (3.8 kg/cm 2 , 0.38 mm). In summary, the CF and DK combinations showed excellent egg production ability and egg quality, while the YC, YD, and YK combinations with the Y strain as the paternal strain exhibited poor performance.