Changes in beef sensory traits as somatic-cell-cloned Japanese black steers increased in age from 20 to 30months

Okumura, Toshiaki; Saito, Kunihikó; Sowa, Taku; Sakuma, Hironori; Ohhashi, Fumie; Tameoka, N.; Hirayama, Muneyuki; Nakayama, Sachio; Sato, Shuji; Gogami, T.; Akaida, M.; Kobayashi, Eiji; Konishi, Kazuyuki; Yamada, Shinichi; Kawamura, Tadashi

doi:10.1016/j.meatsci.2011.06.020

Cited by 25 publications

(21 citation statements)

References 40 publications

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“…Zembayashi et al (1999) reported that intramuscular fat increased up to 36.7 months of age in Japanese Black cattle. This report is supported by Okumura et al (2012), in which an additional fattening period of 6 months, from 24 to 30 months of age, in Japanese Black steers resulted in an increase in intramuscular fat. On the other hand, Yamazaki (1981) reported that marbling increased linearly from 12 to 24 months of age; however, a remarkable increase from 24 to 30 months of age was not seen.…”

Section: Discussionsupporting

confidence: 73%

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Carcass Characteristics and Profitability Analysis Based on Slaughter Age of Hanwoo Steers

Lee¹,

Choi²,

Shin³

et al. 2013

Journal of Animal Science and Technology

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This study analyzed optimal slaughter ages and carcass traits to investigate factors that affect farm incomes. Carcass characteristics and economical analysis of 81 Hanwoo steers previously tested (Expt. 1) and 5,826 steers from Gangwon-Do, area A (Expt. 2) were used. In Expt. 1, the strongest relationship was between the slaughter age and the carcass weight based on the R 2 value, and the weakest relationship was between the slaughter age and the marbling score based on the R 2 . The slaughter age, marbling score, and rib-eye area of steers slaughtered from 26 to 31 months of age had a positive effect on income, but back fat thickness had a negative effect. In the economical analysis of Expt. 1, the optimal time for slaughter was 31 months of age. In Expt. 2, composed of steers slaughtered from 26 to 35 months of age in farms site of area A, the income was highest from steers slaughtered at 28 months of age, after which the income decreased. From the results of Expt. 1 and 2, it is evident that the optimal slaughter age of Hanwoo steers is affected by the genetic differences of calves, the feeding program and management, fattening skills, or carcass price. In order to improve the income of individual farms, the slaughter age must be precisely decided by understanding the exact relationship between the feeding cost of Hanwoo steers and slaughter results, such as carcass weight, yield grade and quality grade.

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Section: Discussionsupporting

confidence: 73%

“…There are several reports on changes in marbling score during the fattening period (Chung, 1997;Okumura et al, 2007Okumura et al, , 2012Yamazaki, 1981;Zembayashi et al, 1999). Zembayashi et al (1999) reported that intramuscular fat increased up to 36.7 months of age in Japanese Black cattle.…”

Section: Discussionmentioning

confidence: 99%

Carcass Characteristics and Profitability Analysis Based on Slaughter Age of Hanwoo Steers

Lee¹,

Choi²,

Shin³

et al. 2013

Journal of Animal Science and Technology

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“…However, when comparing cattle whose age at slaughter was lower than 30 months, conflicting results were reported. Okumura et al (2012) found that soluble collagen content and collagen solubility for 20-month steers were greater than at 25 and 30 months, whereas tenderness and juiciness at 25 months were greater than at 20 months. Du Plessis et al (2007) reported that the meat from 30-monthold steers was less tender and had higher Warner-Bratzler shear force (WBSF) values than 18-month-old steers.…”

Section: Introductionmentioning

confidence: 86%

Comparison of collagen profile and tenderness of muscles from heifers and single-calf cows

Modzelewska‐Kapituła¹,

Nogalski²,

Kwiatkowska³

2015

SA J. An. Sci.

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The aim of the study was to compare slaughter value, collagen profile, shear force and sensory quality of muscles originating from carcasses of heifers and single-calf cows of Polish Holstein-Friesian x Limousine crossbreds. Eight heifers (540 days old) and eight single-calf cows (836 days old), which were produced in a semi-intensive system, were included in the study. Single-calf cows were heavier than the heifers, which had higher dressing percentages and average daily gains. Calving and age at slaughter did not influence cooking loss of semimembranosus (SEM) and infraspinatus (INF) muscles or the shear force of SEM. The ventral part of the INF muscle from single-calf cows exhibited higher shear force values. In both muscles, higher water-soluble and lower acid-soluble collagen contents were noted in heifers compared with single-calf cows. There were no differences in sensory quality of SEM obtained from the carcasses of singlecalf cows and heifers, whereas cross-section appearance, tenderness, juiciness and overall acceptability of INF were scored higher for single-calf cows than for heifers. Thus, it can be concluded that heifers and single-calf cows produce meat with similar eating quality.

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“…Samples were homogenized and stored at À30°C until analysis. Moisture, lipid, free amino acid and dipeptide (anserine and carnosine) contents were determined using the methods described by Okumura et al (2012). Protein and peptide contents were determined using the microbiuret method (Itzhaki & Gill, 1964).…”

Section: Phenotype Measurementsmentioning

confidence: 99%

A genetic analysis of meat compositions in Japanese Black cattle: Genetic parameters and sex influence

Onogi

Sasaki

Kobayashi

et al. 2017

J Animal Breeding Genetics

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Meat composition in beef is related to eating quality and food functionality. Genetic parameters for several meat compositions including free amino acid, peptide and sugar, however, remain poorly described. In this study, we estimated genetic parameters for 51 meat components, including free amino acids, peptides, sugars and fatty acid compositions, and two carcase traits in 1,354 heifers and 1,797 steers of Japanese Black cattle. Heritability estimates were generally equivalent to or moderately greater than those in previous studies of this breed. Genetic correlations between free amino acids, peptides and sugars and carcase traits were often negative, suggesting a trade-off between traits. Using two-trait animal models that treat records from the two sexes as different traits, we estimated sex-specific heritabilities and cross-sex genetic correlations which indicate the sex differences in genetic architecture. In these analyses, 12 traits showed significant heritability differences between sexes and cross-sex genetic correlations occasionally deviated from unity. These results could be used to inform future breeding schemes and investigations of the genetic architecture of meat compositions in beef.

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Changes in beef sensory traits as somatic-cell-cloned Japanese black steers increased in age from 20 to 30months

Cited by 25 publications

References 40 publications

Carcass Characteristics and Profitability Analysis Based on Slaughter Age of Hanwoo Steers

Carcass Characteristics and Profitability Analysis Based on Slaughter Age of Hanwoo Steers

Comparison of collagen profile and tenderness of muscles from heifers and single-calf cows

A genetic analysis of meat compositions in Japanese Black cattle: Genetic parameters and sex influence

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