1. Repeatability of feed efficiency and its relationship with carcass traits in Hanwoo steers during their entire growing and fattening period
- Author
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Hyunjin Cho, Kyewon Kang, Hamin Kang, Seoyoung Jeon, Mingyung Lee, Eunkyu Park, Seokman Hong, and Seongwon Seo
- Subjects
carcass trait ,feed conversion ratio ,feed efficiency ,hanwoo ,residual feed intake ,Zoology ,QL1-991 - Abstract
Objective This study investigated the repeatability of feed efficiency and its association with carcass traits in Hanwoo steers during the entire growing and fattening periods. Methods The growth and intake of thirty-six Hanwoo steers (259±19.7 kg; nine months) were monitored throughout five periods, including two growing periods (GP) and three fattening periods (FP). The steers were fed two types of concentrate mixes with varying nutrient compositions until they reached a target weight of 800 kg for slaughter. For each period, steers were categorized into three classes based on their feed efficiency rankings using residual feed intake (RFI) and feed conversion ratio (FCR). Feed efficiency repeatability was assessed using the Spearman correlation coefficient, decomposition of random errors, and the Theil segregation index (TSI). The Pearson correlation coefficient was used to examine the relationship between feed efficiency and carcass traits. Results The results demonstrated a significant and high correlation with RFI, but not FCR, during the growing or fattening stages (r>0.5; p
- Published
- 2024
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