WEKO3
アイテム
肉用種雌牛の産肉形質の選抜に関する研究
http://hdl.handle.net/10458/5631
http://hdl.handle.net/10458/5631fd8b8a4a-7b0e-49c0-9dbb-4852ffc1f33d
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
本文 (432.9 kB)
|
|
| Item type | 報告書 / Research Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-06-21 | |||||
| タイトル | ||||||
| タイトル | 肉用種雌牛の産肉形質の選抜に関する研究 | |||||
| 言語 | ja | |||||
| タイトル | ||||||
| タイトル | Studies on Selecting Japanese Black Cow on Their Carcass Traits | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_18ws | |||||
| 資源タイプ | research report | |||||
| 研究代表者 |
原田, 宏
× 原田, 宏 |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Research data on selecting superior breeding cows are insufficient in Japan, and there still remains a wide unexplored domain. The present research aims at obtaining more fundamental Knowledge. The ultrasonic evaluation techniques were used for estimating fat thickness, M. long. thoracis area and marbling score between 7-8th ribs of 1140 Japanese Black heifers. The effects off sire, dam's sire, raising place, birth season of heifer and regression on parity of dam and age of dam on ultrasonic estimates of those carcass traits of heifer were investigated by least squares procedures. Then statistical study was tried to clarify the relationships of ultrasonic estimates of carcass traits with condition score and body measurements of heifers. Mans and standard deviations of ultrasonic estimates between 7-8th ribs of heifers were 15.63±2.70mm, 33.4±2.98cm^2 and 0.81±0.57,respectively. Significant sire differences were found for both ultrascnic estimates of fat thickness (p<0.01) and mardling score (p<0.05) among sires. Fat thickness estimates were also significantly different (p<0.05) among dam's sire. Effects of raising place on ultrasonic estimates of fat thickness and M. log. thoracis area were highiy significant (p<0.01) Heifers which were born in spring tend to have smaller (p<0.01) M. long. thoracis area estimate than those in the other seasons. No significant relationships of regresslon on both parity and age of dam were found for ultrasonic estimates in all traits of heifers. Fat thickness estimates have close connection with ondition score and bdy measurements except withers height in heifers. Marbling score estimates were also closely related to condition score and body measurements. No significant relationships were found between ultrasonic estimates of M. long. thoracis area and any traits of heifers. If it is able to clarify the relationships between carcass traits of cows and their calves, the selection of superior breeding stock based on these predicted carcass traits by use of ultrasonic scanning will be possible enough in relative elyearly growing stage of heifers. |
|||||
| 言語 | en | |||||
| 内容記述 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | この研究は「伊藤記念財団」の助成を受けて行われました。 | |||||
| 言語 | ja | |||||
| 著者版フラグ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
