한국 재래닭의 부화 후 성장단계별 넙다리뼈와 정강뼈 성장에 관한 연구

Abstract

Skeletal development of chicken has been widely discussed in industrial forums and various research reports. However, these studies were emphasis on the commercial chicken strains for improve egg and meat production whereas the skeletal quiet remains as a potential weak link related to facilitating in the physical support of heavier carcasses at ever younger ages. For that, the study of standardization of skeletal development is important but it was rarely reported in Korean native chicken (KNC). The study was investigated the skeletal characteristics of KNC for international standardization. We studied in KNC at 2, 14, 28, 42, 56, 70, 84, 98, 112, 126, 147, 168, 196, 224, 336 and 448 days after hatch (male and female, n=13 for each group). We measured the body weight (BW), and after sacrifice measured organs and remove muscle from femur & tibia and measured bone weight. Data were analyzed by ANOVA, Duncan test, correlation analysis and regression analysis of SAS 9.1. We analyzed the data of BW, femur & tibia and made growth curve also. The BW was significantly increased up to 147 days after hatch (male, <TEX>$1,927.88{\pm}68.92g$</TEX>; female, <TEX>$1,456.00{\pm}50.11g$</TEX>), and then increased gradually. At 336 days, these growth was stop (male, <TEX>$2,467.00{\pm}42.84g$</TEX>; female, <TEX>$1,568.71{\pm}62.62g$</TEX>). The growth of femur & tibia length and width was stop on 98~126 days after hatch. At 98 days, we measured the length and width of femur & tibia in male were <TEX>$132.39{\pm}3.18mm$</TEX> & <TEX>$25.98{\pm}0.59mm$</TEX> whereas in female at 112 days the length of femur & tibia was <TEX>$116.40{\pm}1.55mm$</TEX> and at 126 days width was <TEX>$21.41{\pm}0.38mm$</TEX>. Our study suggests that the growth of male KNC was classified pre-puberty (0~98 days), puberty (98~336 days) and maturity (after 336 days), meanwhile female was shown similar trend however puberty period of KNC was 112 or 126 days after hatch.