Selection for higher body weight in Nelore cattle is effective in achieving an increase of longissimus muscle area without reducing subcutaneous fat thickness

This paper aimed to identify and evaluate the effects of sire breed on temperament and productive traits of different cross-breeds between Nellore (NE), Tabapua (TB), and Brahman (BR) bulls mated with Angus cows (AN), as well as the relationship between temperament and productive traits. The productive traits measured in this study include slaughter weight and post weaning weight gain. Temperament was assessed by flight-speed (FS). Carcass data collected in this study include hot carcass weight, hot carcass percentage, cold dressing percentage, carcass length, initial pH, ultimate pH, subcutaneous fat thickness and carcass longissimus muscle area. The sire breed effect was greater for slaughter weight. Hot carcass weight was not affected by the sire breed. The longissimus muscle area was larger for AN x TB and AN x NE crossbreeds than for AN x BR crossbreeds. Subcutaneous fat thickness and cold dressing percentage were not affected by sire breed. The offspring of NE, TB, and BR sires mated with AN cows had similar carcass measurements, except for the longissimus muscle area, which was smaller for offspring sired by the Brahman breed. The temperament trait was not influenced by sire breed.

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PSIV-B-28 Late-Breaking: Performance and carcass quality of Nelore bull’s progenies with contrasting traits for precocity, growth and muscularity

Journal of Animal Science ◽

10.1093/jas/skz258.644 ◽

2019 ◽

Vol 97 (Supplement_3) ◽

pp. 319-321

Author(s):

Taiane S Martins ◽

Juliana Silva ◽

Lenise Mueller ◽

Tamyres Amorim ◽

Annelise Aila G Lobo ◽

...

Keyword(s):

Feed Efficiency ◽

Average Daily Gain ◽

Backfat Thickness ◽

Longissimus Muscle ◽

Muscle Area ◽

Final Body Weight ◽

Fat Thickness ◽

Nelore Cattle ◽

Daily Gain

Abstract The goal of this study was to evaluate the performance and the carcass traits of Nelore cattle progenies from bulls selected by contrasting traits for precocity, growth and muscularity, through the Expected Progeny Difference (EPD). One hundred and five Nelore bulls (initial weight of 350kg±15kg) and 20 months of age were confined and fed with same diet (73% of concentrate). Thirty-two animals were selected to create the contrasting groups for precocity, growth and muscularity (16 animals assigned as a low EPD group - LEPD and 16 animals assigned as a high EPD group - HEPD), based on the EPD of their parents. The ribeye area and backfat thickness were performed by ultrasonography of 12–13th rib fat thickness and longissimus muscle area (LMA), as well as rump fat thickness (RF) measurements. Animals were harvested after 100 days and during the deboning, meat cuts were weight for cutting yield. The animals selected for the HEPD group had greater average daily gain (P = 0.006), which can be explained by the higher feed intake (P = 0.006). However, there are no difference between groups for the final body weight (P = 0.254) and feed efficiency (P = 0.715). The LEPD group presented higher dressing percentage (P = 0.028). Although the groups evaluated did not presented difference in LMA (P = 0.329) and weight of longissimus muscle (P = 0.480), the weight of rump displayed heaviest in the HEPD (P = 0.037). There was no difference between groups for RF (P = 0.086). Nevertheless, backfat thickness was higher in HEPD group (P = 0.006). The present study indicates that Nelore cattle progenies, with parents displaying higher potential for precocity, growth, and muscularity, show greater backfat thickness and weightiest of rump than the other genetic backgrounds. Thanks to FAPESP for the scholarship (Grant # 2017/02349–1).

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Days on feed and sex effects on live weight and carcass traits measured by ultrasound

Scientia Agricola ◽

10.1590/s0103-90162005000500002 ◽

2005 ◽

Vol 62 (5) ◽

pp. 423-426 ◽

Cited By ~ 2

Author(s):

Saulo da Luz e Silva ◽

Evaldo Antonio Lencioni Titto ◽

Paulo Roberto Leme ◽

Luciane Silva Martello ◽

Angélica Simone Cravo Pereira ◽

...

Keyword(s):

Low Cost ◽

Subcutaneous Fat ◽

Live Weight ◽

Experimental Period ◽

Longissimus Muscle ◽

Muscle Area ◽

Stress Effects ◽

Nellore Cattle ◽

Subcutaneous Fat Thickness ◽

Composition Changes

There is a paucity of information in the literature on body composition changes in Nellore cattle and its crosses, mainly on heifers and intact males. Ultrasound is a useful, low cost tool to easily obtain this information, with minimal animal stress. Effects of sex and days on feed on live weight (LW) and ultrasound Longissimus muscle area (ULMA) and subcutaneous fat thickness (UFAT) measurements were evaluated in F1 Piedmont <FONT FACE=Symbol>´</FONT> Nelore, 27 heifers (HF) and 27 intact males (IM). HF and IM had an initial LW of 256 ± 5.6 and 265 ± 5.6 kg, respectively, and were fed a diet containing 77% TDN for 131 days. LW, ULMA, and UFAT were evaluated at 28-d intervals. Interactions between sex and days on feed were found for all traits studied. LW increased linearly with days on feed, and IM had greater LW than HF throughout the trial. Mean initial ULMA was 55.8 and 55.5 cm² for HF and IM, respectively, and increased linearly until the end of the experiment (78.7 and 82.8 cm², respectively). IM showed higher ULMA than HF only in the last measurement. Initial UFAT averaged 0.04 and 0.4 mm for IM and HF, respectively, and increased linearly during the feeding period (2.4 and 4.3 mm, respectively). UFAT was higher n HF than in IM during the entire experimental period. IM showed faster growth rates and protein accretion than HF in the Longissimus muscle. HF showed faster subcutaneous fat accretion.

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Productive performance of Nellore steers on rotational grazing on Marandu grass and Convert HD 364 grass

Semina Ciências Agrárias ◽

10.5433/1679-0359.2018v39n4p1627 ◽

2018 ◽

Vol 39 (4) ◽

pp. 1627

Author(s):

André Felipe Borges Krinchev ◽

Valter Harry Bumbieris Junior ◽

José Renato Silva Gonçalves ◽

Laísse Garcia Lima ◽

Ana Maria Bridi ◽

...

Keyword(s):

Body Weight ◽

Leaf Blade ◽

Dry Matter ◽

Average Daily Gain ◽

Subcutaneous Fat ◽

Rotational Grazing ◽

Grazing System ◽

Subcutaneous Fat Thickness ◽

Fat Thickness ◽

Daily Gain

The objective of this study was to evaluate the effect of Brachiaria spp. Cv. Mulato II (Convert) on performance, meat quality and carcass characteristics of castrated Nellore steers in the growing and finishing phases, in rotational grazing system, compared to Brachiaria brizantha cv. Marandu, under the same conditions. The experimental area was divided into two treatments: Marandu and Convert with 20 hectares each, splited in four replications per treatment, composed of five paddocks of one hectare each. Animals were managed based on the availability of leaf blade dry matter (6.19% body weight) in rotational grazing with 7 days of occupation and 28 days of rest. Ten animals were used in each replicate (testers), as well as regulatory animals whenever necessary. Animals were managed based on the availability of leaf blade dry matter (6.19% body weight) in rotational grazing with 7 days of occupation and 28 days of rest. Ten animals were used in each replicate (testers), as well as regulatory animals whenever necessary. For performance analysis, 10 animals of each replicate were used, while for carcass and meat analyses, only six of each replicate. Production and chemial characteristics of the two grasses were evaluated. The experimental design was completely randomized with two treatments and four replicates; data were tested by analysis of variance using the R software. Animals fed on Convert grass were superior than those fed on Marandu grass, with higher average daily gain (0.682 kg vs. 0.605 kg), slaughter weight (470.45 kg vs. 451.43 kg), hot carcass weight (239.93 kg vs. 232.36 kg). The study also showed the possibility of finishing castrated young steers (up to 30 months) and with subcutaneous fat thickness required by industry (3 mm) in both pastures.

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Relationships among carcass quality characteristics between and within carcass quartering sites

Australian Journal of Agricultural Research ◽

10.1071/a96148 ◽

1998 ◽

Vol 49 (2) ◽

pp. 285 ◽

Cited By ~ 4

Author(s):

S. Baud ◽

C. M. Wade ◽

M. E. Goddard

Keyword(s):

Water Content ◽

Subcutaneous Fat ◽

Intramuscular Fat ◽

Quality Characteristics ◽

Carcass Quality ◽

Longissimus Muscle ◽

Fat Percentage ◽

Muscle Area ◽

Intermuscular Fat ◽

Fat Thickness

Carcass quality characteristics were measured on 511 steers of 4 breeds that were destined for the Japanese market. All steers had carcass measurements taken at the 10th/11th rib interface, while 103 steers had additional measurements made on the same characteristics at the 5th/6th rib interface. Australian marbling score, longissimus muscle area, intramuscular fat percentage, intramuscular water content, Japanese intermuscular fat thickness, Japanese subcutaneous fat thickness, Japanese rib thickness, and meat pH were measured in the study. These measurements allowed the phenotypic relationships between the different carcass quality traits measured at the 10th/11th rib interface to be calculated. Significant positive correlations were observed among measurements of carcass fatness, and significant negative correlations were observed between carcass fatness and carcass water content. Angus and Murray Grey cattle had higher levels of marbling and intramuscular fat than Hereford and Poll Hereford cattle The data enabled Australian, USDA, and Japanese marbling standards to be compared on the basis of intramuscular fat percentage determined by an ether extraction process. Differences between the same carcass characteristics taken at 5th/6th and 10/11th rib interfaces of the longissimus dorsi were estimated from the 103 steers measured at both sites. Correlations between the rib sites were high for marbling, intramuscular fat, and intramuscular water, but low for longissimus muscle area, intermuscular fat thickness, and pH.

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Meat Production in a Feedlot System of Zebu—Holstein Steers and Heifers with Dairy Genetics: Productive and Biological Analyses

The Scientific World JOURNAL ◽

10.1155/2014/371968 ◽

2014 ◽

Vol 2014 ◽

pp. 1-7 ◽

Cited By ~ 2

Author(s):

Gustavo Chamon de Castro Menezes ◽

Sebastião de Campos Valadares Filho ◽

José Reinaldo Mendes Ruas ◽

Edenio Detmann ◽

Arismar de Castro Menezes ◽

...

Keyword(s):

Body Weight ◽

Dry Matter ◽

Subcutaneous Fat ◽

The Body ◽

Biological Efficiency ◽

Meat Production ◽

Net Energy ◽

Productive Performance ◽

Subcutaneous Fat Thickness ◽

Fat Thickness

The aim of this study was to evaluate the productive and biological efficiency of steers and heifers from dairy genetics in a feedlot system in terms of meat production. Twenty-four steers and 24 heifers at 10 monthes of age, (3/4) Zebu × (1/4) Holstein were utilized. They were distributed over four feedlot times, 30, 60, 90, and 120 days with four replications for each sex, and were slaughtered at the end of each period. The productive and biological analyses were performed through comparative slaughter to determine the body composition. Heifers presented with greater intakes (P<0.05) of dry matter in grams per kg of body weight. Steers presented with a greater (P<0.05) final empty body weight, carcass gain, cold carcass weight, and meat proportion in the carcass; however, heifers presented with a greater subcutaneous fat thickness (P<0.05) and, consequently, a greater (P<0.05) fat proportion in the carcass. We conclude that steers are more efficient in their productive performance than heifers in a feedlot. For the finishing carcass fat cover, heifers need 90 days in the feedlot. The net energy requirements for maintenance are 67 kcal/EBW0.75/d, and the net requirements of energy (NEg) and protein (NPg) for gain can be estimated by the following equations:NEg(Mcal/d)=0.067×EBW0.75× EBG1.095andNPg=162×EBG-5.62×REfor the two sexes.

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Carcass quality of feedlot finished steers fed yeast, monensin, and the association of both additives

Arquivo Brasileiro de Medicina Veterinária e Zootecnia ◽

10.1590/s0102-09352009000300018 ◽

2009 ◽

Vol 61 (3) ◽

pp. 648-654 ◽

Cited By ~ 9

Author(s):

R.C. Gomes ◽

P.R. Leme ◽

S.L. Silva ◽

M.T. Antunes ◽

C.F. Guedes

Keyword(s):

Shear Force ◽

Subcutaneous Fat ◽

Feed Additives ◽

Carcass Quality ◽

Yeast Culture ◽

Meat Color ◽

Muscle Area ◽

Subcutaneous Fat Thickness ◽

Fat Thickness

To evaluate the effects of the supplementation of feed additives on carcass quality in beef cattle, 72 Nellore steers (339.5kg, 20-month old) were feedlot finished and fed for 91 days one of the following diets: 1) control with no additives; or added of 2) live yeast culture; 3) monensin; or 4) the association of both additives. After slaughter, renal, pelvic, and inguinal fat and hot carcass weights were recorded and carcass was split into muscle, bone, and trimmable fat. Carcass Longissimus muscle area and subcutaneous fat thickness at the 12th rib were measured and steaks of Longisimus muscle were taken to determine meat color, shear force, drip, and cooking losses. Yeast increased carcass dressing percentage but there were no effects on hot carcass weight, Longissimus area, subcutaneous fat thickness, percentage and weight of retail cut yield and trimmings. Feed additives had no effect on carcass pH, meat color, fat content, shear force, and drip losses. Supplementation of yeast, monensin or the association of both additives had no important effects on carcass traits and on meat quality of feedlot finished steers.

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