肉用種雄牛の屠肉形質の早期推定

原田 宏; 守屋 和幸; 福原 利一

doi:10.2508/chikusan.56.250

Early Prediction on Carcass Traits of Beef Bulls

Hiroshi HARADA, Kazuyuki MORIYA, Riichi FUKUHARA

Author information

JOURNAL FREE ACCESS

1985 Volume 56 Issue 3 Pages 250-256

DOI https://doi.org/10.2508/chikusan.56.250

Details

Published: March 25, 1985 Received: June 19, 1984 Available on J-STAGE: March 10, 2008 Accepted: - Advance online publication: - Revised: -
Correction information
Date of correction: March 10, 2008 Reason for correction: - Correction: PDF FILE Details: -

Date of correction: March 10, 2008 Reason for correction: - Correction: PDF FILE Details: -

Date of correction: March 10, 2008 Reason for correction: - Correction: ABSTRACT Details: Wrong : Performance tested Japanese Black bulls were ultrasonically scanned to predict on their fat thickness, M. long. thoracis area and marbling score at three stages, i. e. the end of testing period (Stage I), 4 months (Stage II) and 10 months (Stage III) after performance testing. The possibity to predict on these carcass trait estimates at Stage II and Stage III by carcass estimates and body measurements obtained at Stage I was examined in this report. Means and standard deviations of fat thickness, M. long. thoracis area and marbling score of bulls at Stage I were 5.0±1.5mm, 30.7±1.4cm and+0.5±0.4, respectively. The increase during four or ten months after testing were 1.2±1.4mm or 1.1±0.4mm for fat thickness, 9.2±0.8cm2 or 16.0±2.7cm2 for M. long. thoracis area and 0.6±0.40 or 1.8±0.7 for marbling score, respectively. Simple correlation coefficients between ultrasonic estimates at Stage I and those at Stage II and III were 0.63, 0.61 for fat thickness, 0.86, 0.77 for M. long. thoracis area and 0.78, 0.24 for marbling score, respectively. They were mostly significant (P<0.01) except for marbling score between at Stage I and III. The ratios of increase on these carcass traits of sires do not originate from individual difference after 20 months old. By using multiple regression equations fat thickness, M. long. thoracis area and marbling score at Stage II and III can be predicted from the ultrasonic estimates of carcass traits and body measurements at Stage I with contribution ratios of 50.8, 54.7%, 78.9, 74.5% and 73.2, 29.3%, respectively. Fat thickness and M. long. thoracis area at Stage III will be able to predict sufficiently at Stage I.
Right : Performance tested Japanese Black bulls were ultrasonically scanned to predict on their fat thickness, M. long. thoracis area and marbling score at three stages, i. e. the end of testing period (Stage I), 4 months (Stage II) and 10 months (Stage III) after performance testing. The possibity to predict on these carcass trait estimates at Stage II and Stage III by carcass estimates and body measurements obtained at Stage I was examined in this report. Means and standard deviations of fat thickness, M. long. thoracis area and marbling score of bulls at Stage I were 5.0±1.5mm, 30.7±1.4cm2 and+0.5±0.4, respectively. The increase during four or ten months after testing were 1.2±1.4mm or 1.1±0.4mm for fat thickness, 9.2±0.8cm2 or 16.0±2.7cm2 for M. long. thoracis area and 0.6±0.40 or 1.8±0.7 for marbling score, respectively. Simple correlation coefficients between ultrasonic estimates at Stage I and those at Stage II and III were 0.63, 0.61 for fat thickness, 0.86, 0.77 for M. long. thoracis area and 0.78, 0.24 for marbling score, respectively. They were mostly significant (P<0.01) except for marbling score between at Stage I and III. The ratios of increase on these carcass traits of sires do not originate from individual difference after 20 months old. By using multiple regression equations fat thickness, M. long. thoracis area and marbling score at Stage II and III can be predicted from the ultrasonic estimates of carcass traits and body measurements at Stage I with contribution ratios of 50.8, 54.7%, 78.9, 74.5% and 73.2, 29.3%, respectively. Fat thickness and M. long. thoracis area at Stage III will be able to predict sufficiently at Stage I.

Date of correction: March 10, 2008 Reason for correction: - Correction: PDF FILE Details: -

Abstract

Performance tested Japanese Black bulls were ultrasonically scanned to predict on their fat thickness, M. long. thoracis area and marbling score at three stages, i. e. the end of testing period (Stage I), 4 months (Stage II) and 10 months (Stage III) after performance testing. The possibity to predict on these carcass trait estimates at Stage II and Stage III by carcass estimates and body measurements obtained at Stage I was examined in this report. Means and standard deviations of fat thickness, M. long. thoracis area and marbling score of bulls at Stage I were 5.0±1.5mm, 30.7±1.4cm2 and+0.5±0.4, respectively. The increase during four or ten months after testing were 1.2±1.4mm or 1.1±0.4mm for fat thickness, 9.2±0.8cm2 or 16.0±2.7cm2 for M. long. thoracis area and 0.6±0.40 or 1.8±0.7 for marbling score, respectively. Simple correlation coefficients between ultrasonic estimates at Stage I and those at Stage II and III were 0.63, 0.61 for fat thickness, 0.86, 0.77 for M. long. thoracis area and 0.78, 0.24 for marbling score, respectively. They were mostly significant (P<0.01) except for marbling score between at Stage I and III. The ratios of increase on these carcass traits of sires do not originate from individual difference after 20 months old. By using multiple regression equations fat thickness, M. long. thoracis area and marbling score at Stage II and III can be predicted from the ultrasonic estimates of carcass traits and body measurements at Stage I with contribution ratios of 50.8, 54.7%, 78.9, 74.5% and 73.2, 29.3%, respectively. Fat thickness and M. long. thoracis area at Stage III will be able to predict sufficiently at Stage I.

Corresponding author

Correction information

Register with J-STAGE for free!