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Advances in animal biosciences 22건

  1. [해외논문]   Growth paths for suckler bulls slaughtered at 19 months of age: a meat quality perspective  

    Moran, L. , O'Sullivan, M. G. , Kerry, J. P. , McGee, M. , McMenamin, K. , O'Riordan, E. , Moloney, A. P.
    Advances in animal biosciences v.8 suppl.1 ,pp. s60 - s63 , 2017 , 2040-4700 ,

    초록

    This experiment aimed to assess the effect of different indoor winter growth rates (WGR) followed by different concentrate supplementation levels at pasture on meat quality of 90 bulls. During the first winter, bulls were offered grass silage ad libitum and either 3 kg (WGR3) or 6 kg (WGR6) of concentrates. After turn-out to pasture, bulls were offered: grass without supplementation (PO), grass plus 0.2 predicted dry matter intake (DMI) as concentrates (PL) or grass plus 0.4 predicted DMI as concentrates (PH). After finishing, colour, chemical composition (unaged), instrumental texture and sensory characteristics (14 days of ageing) of longissimus thoracis were measured. WGR6 bulls had heavier carcasses than WGR3 bulls. There was an interaction between WGR and supplementation for instrumental texture and redness ( a ). Within WGR3, PO beef was the most tender, whereas within WRG6, PL was the most tender. However, these differences were not detected by the sensory panel. Within WGR3, redness was the lowest for PL, whereas within WRG6, PO was the least red. No differences were found for chemical composition. The multivariate analysis highlighted WGR as the main variable affecting meat quality characteristics. In conclusion, variations in growth path exerted minor effects on appearance and instrumental texture which did not affect the perception of bull beef by a trained sensory panel.

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  2. [해외논문]   Abundance of beige and brown adipocyte markers in different adipose depots of cattle at 26 months of age  

    Komolka, K. , Albrecht, E. , Gotoh, T. , Maak, S.
    Advances in animal biosciences v.8 suppl.1 ,pp. s38 - s41 , 2017 , 2040-4700 ,

    초록

    Activity of brown and beige adipocytes could contribute to breed differences in fat deposition. Therefore, we compared the abundance of markers for adipocyte types in steers from three cattle breeds differing in fat deposition (Japanese Black, Holstein, Charolais). Markers for white (leptin (LEP)), beige (transmembrane protein 26 (TMEM26), uncoupling protein 1 (UCP1)), and brown adipocytes (Zic family member 1 (ZIC1), UCP1) were analysed by quantitative reverse transcription PCR in subcutaneous fat (SCF), intramuscular fat (IMF), intermuscular fat (IRMF), perirenal fat (PF) and visceral fat (VF). LEP messenger RNA (mRNA) was less abundant in VF compared with other depots ( P P

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  3. [해외논문]   Editorial  

    Hocquette, J. F. , Klopč , ič , , M.
    Advances in animal biosciences v.8 suppl.1 ,pp. s1 - s1 , 2017 , 2040-4700 ,

    초록

    Activity of brown and beige adipocytes could contribute to breed differences in fat deposition. Therefore, we compared the abundance of markers for adipocyte types in steers from three cattle breeds differing in fat deposition (Japanese Black, Holstein, Charolais). Markers for white (leptin (LEP)), beige (transmembrane protein 26 (TMEM26), uncoupling protein 1 (UCP1)), and brown adipocytes (Zic family member 1 (ZIC1), UCP1) were analysed by quantitative reverse transcription PCR in subcutaneous fat (SCF), intramuscular fat (IMF), intermuscular fat (IRMF), perirenal fat (PF) and visceral fat (VF). LEP messenger RNA (mRNA) was less abundant in VF compared with other depots ( P P

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  4. [해외논문]   Comparison of rolled barley with citrus pulp as a supplement for growing cattle offered grass silage  

    Lenehan, C. , Moloney, A. P. , O'Riordan, E. G. , Kelly, A. , McGee, M.
    Advances in animal biosciences v.8 suppl.1 ,pp. s33 - s37 , 2017 , 2040-4700 ,

    초록

    This study aimed to examine the effects of replacing rolled barley (high in starch) with citrus pulp (high in digestible fibre) in a supplement on intake and performance of young growing cattle offered grass silage ad libitum for 101 days. Weaned, early- and late-maturing breed, male suckled beef calves ( n = 120) were blocked by sire breed, gender and weight and from within block randomly assigned to one of two concentrate supplements based mainly on rolled barley (BAR) or citrus pulp (CIT) and formulated to have similar concentrations of true protein digestible in the small intestine. On day 87, blood samples were taken before and 2 h after feeding, and rumen fluid samples were collected 2 h post-feeding. Supplement type did not affect ( P >0.05) grass silage intake, live weight gain, final live weight, ultrasonically assessed body composition or measurements of skeletal size. Rumen pH (6.64 v . 6.79), ammonia (51 v . 81 mg/l) and acetate-to-propionate ratio (2.7 v . 3.2) were lower ( P

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  5. [해외논문]   Intramuscular connective tissue properties in longissimus thoracis muscle of Simmental Cattle  

    Holló , , G. , Hú , th, B. , Egri, E. , Holló , , I. , Anton, I.
    Advances in animal biosciences v.8 suppl.1 ,pp. s48 - s50 , 2017 , 2040-4700 ,

    초록

    Intramuscular connective tissue plays an important role in meat tenderness. Our objective was to compare the collagen/hydroxyproline content and X-ray computed tomographic (CT) connective tissue proportion of longissimus thoracis (LT) muscle in Hungarian Simmental bulls and cows. Cows had lower carcass weight (247 kg v . 295 kg), EU conformation score (3.5 v . 5.5) and fatness score (4.2 v . 5.9) than bulls ( P v . 0.66±0.28%, P v . 0.67±0.11%, P r = 0.8. There was a weak positive correlation between slaughter age and CT connective tissue as well as collagen content of LT ( r = 0.3 to 0.4). In conclusion, intramuscular connective tissue proportion in LT increased with slaughter age and older cows had higher collagen and connective tissue proportion than bulls. Mixed CT scans can be used for the analysis of intramuscular connective tissue content.

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  6. [해외논문]   Identification of genomic regions related to tenderness in Nellore beef cattle  

    Carvalho, M. E. , Baldi, F. S. , Santana, M. H. A. , Ventura, R. V. , Oliveira, G. A. , Bueno, R. S. , Bonin, M. N. , Rezende, F. M. , Coutinho, L. L. , Eler, J. P. , Ferraz, J. B. S.
    Advances in animal biosciences v.8 suppl.1 ,pp. s42 - s44 , 2017 , 2040-4700 ,

    초록

    The aim of this study was to identify genomic regions that associated with beef tenderness in Nellore cattle. Phenotypes were obtained according to the standard USDA Quality Grade (1999). Data from 909 genotyped Nellore bulls were used in the Genome-Wide Association Study (GWAS) undertaken using a single-step approach including also a pedigree file composed of 6276 animals. The analyses were performed using the Blupf90 software, estimating the effect of genomic windows of 10 consecutive markers. The GWAS results identified 18 genomic regions located on 14 different chromosomes (1, 4, 6, 7, 8, 10, 18, 19, 20, 21, 22, 25, 26 and 29), which explained more than 1% of the total additive genetic variance; several candidate genes were located in these regions including SLC2A9, FRAS1, ANXA3, FAM219A, DNAI, AVEN, SHISA7, UBE2S, CDC42EP5, CNTN3, C16orf96, UBALD1, MGRN1 and SNORA1 With the single-step GWAS, it was possible to identify regions and genes related to meat tenderness in Nellore beef cattle.

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  7. [해외논문]   Pasture-based finishing of early-maturing sired suckler beef bulls at 15 or 19 months of age  

    Lenehan, C. , Moloney, A. P. , O'Riordan, E. G. , Kelly, A. , McGee, M.
    Advances in animal biosciences v.8 suppl.1 ,pp. s28 - s32 , 2017 , 2040-4700 ,

    초록

    The performance of early-maturing breed sired suckler bulls finished at pasture, with or without concentrate supplementation, at 15 or 19 months of age was evaluated. In total, 60 Aberdeen Angus-sired bulls were assigned to a two (slaughter age (SA): 15 (S15) or 19 (S19) months)×two (finishing strategies (FS): grass only or grass+barley-based concentrate) factorial arrangement. There were no ( P >0.05) SA×FS interactions. Increasing SA increased carcass weight (265 v . 355 kg), kill-out proportion (542 v . 561 g/kg), conformation (6.7 v . 8.3, 1 to 15) ( P v . 6.8) scores ( P b ' value, 6.6 v . 8.3) and darker muscle (' L ' value, 30.0 v . 28.3) ( P P P = 0.06) but had no effect on carcass fat and conformation scores or fat and muscle colour. In conclusion, carcasses were adequately finished, with or without concentrates for S19, but not for S15. Supplementation had no effect, and age had relatively minor effects, on fat and muscle colour.

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  8. [해외논문]   Evaluation of marbling traits by X-ray computed tomography in Hungarian Simmental bulls  

    Holló , , G. , Hú , th, B. , Holló , , I. , Anton, I.
    Advances in animal biosciences v.8 suppl.1 ,pp. s51 - s54 , 2017 , 2040-4700 ,

    초록

    Marbling is an economically important factor in many beef carcass grading schemes. This study aimed to evaluate marbling traits of longissimus thoracis muscle (LT) with different methods: USDA marbling score, intramuscular fat (IMF) content by image analysis of X-ray computed tomography (CT) scans and by conventional analytical method. Bulls ( n = 46) were slaughtered at an average weight of 536 kg and an average age of 646 days. Mean values of EUROP fat scores varied from 2− to 2+, whereas mean values of EUROP conformation grade from O0 to R0. Average growth rate of bulls was 955 g/day. Average chemical fat content of LT varied from 2.2% to 3.1% across conformation classes, and from 2.3% to 5.0% across fat classes. Intramuscular fat content in the 12th rib and in LT on CT-scans closely correlated with chemical fat content ( r = 0.81 and 0.85, respectively). The highest frequency of USDA marbling score was 'small' (55.2%), followed by 'slight' (25.5%), 'modest' (17%) and 'moderate' (2.1%). Computed tomography scans of LT can be used for the evaluation of marbling in Hungarian Simmental cattle. Bulls with higher growth rate had lower marbling level in LT ( r = −0.4 to −0.5). EUROP conformation and fat scores have no relationship with marbling traits in this specific cattle population.

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  9. [해외논문]   Analysis of suckler cow reproductive performance and its contribution to financial performance on Irish beef farms  

    Taylor, R. F. , McGee, M. , Crosson, P. , Kelly, A. K.
    Advances in animal biosciences v.8 suppl.1 ,pp. s64 - s66 , 2017 , 2040-4700 ,

    초록

    The aim of this study was to analyse cow reproductive performance on 37 Irish suckler beef farms and determine how reproductive efficiency influences farm profitability. The main reproductive factors associated with gross output value per livestock unit (GO/LU) were average age at first calving ( r = −0.19, P r = −0.15, P r = 0.21, P r = 0.18, P r = 0.21, P

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  10. [해외논문]   Evaluation of production efficiencies among primiparous suckler cows of diverse genetic index at pasture  

    McCabe, S. , McHugh, N. , Prendiville, R.
    Advances in animal biosciences v.8 suppl.1 ,pp. s55 - s59 , 2017 , 2040-4700 ,

    초록

    This study aimed to determine estimates of production efficiency among primiparous suckler cows of diverse genetic merit (GM) for the national Irish maternal index. Data from 82 heifers of diverse GM across two different replacement strategies (suckler (S) or dairy (D) sourced) were available. Milk yield, grass dry matter intake, cow BW and body condition score (BCS) were recorded. The maternal index had no significant effect on any parameters investigated, whereas S cows were 86 kg heavier in BW, had a 0.33 greater BCS and 0.6 UFL greater NEM requirement compared with D beef crossbred (F1) cows. The F1 produced 2.2 kg/day more milk and had greater lactation energy requirements (0.8 UFL) than S. The F1 produced 0.48 kg milk per 100 kg BW and 0.15 kg more milk per unit intake. An interaction between GM and cow origin (CO) showed that F1 low merit cows consumed an additional 1 kg DM than F1 high, and that S high merit cows produced 1.5 kg less milk than their S low counterparts resulting in a 0.5 UFL greater energy requirement for milk production for S low. The F1 high merit cows produced 0.12 kg more milk per unit intake than F1 low cows, whereas S low cows produced 0.12 kg less milk per unit intake than S high. The F1 low cows consumed 0.17 kg more DM per unit BW than F1 high. Thus, genetic selection for maternal traits has not resulted in differences in production efficiency traits, however CO differences were observed.

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