7/30/2019 2 IMM Beef Marbling

1/2B-12

Marbling is an importanttrait in characterizingbeef quality. Marblingcombined with carcassmaturity is used to deter-mine the USDA qualitygrade. Marbling is indicat-ed by the amount ofintramuscular fat (fatwithin the muscle) in theribeye between the 12thand 13th rib of a chilledcarcass. There are ten

degrees of marbling how-ever, the six marblingdegrees associated withPrime, Choice and Select,the most common qualitygrades to the internation-al markets, are shownabove. These pictures arerepresentative of leancolor from carcasses withA maturity which indi-

El marmoleo es una carac-terstica importante paraclasificar la calidad de la res.El marmoleo, combinado conla madurez de la canal, seusa para determinar el gradode calidad otorgado porUSDA. El marmoleo lo deno-ta la cantidad de grasa intra-muscular (grasa dentro delmsculo) en la parte centraldel costillar, entre la dcimasegunda y dcima tercera

costillas de una canalrefrigerada. Hay diez gradosde marmoleo; arribamostramos los seis asociadoscon los grados de calidadms comunes en los merca-dos internacionales que sonPrime, Choice y Select. Estasfotografas, representativasdel color de la carne en unacanal con una madurez A,

MarblingDescriptions

Descripcin del Marmoleo

Moderately Abundant Slightly Abundant Moderate

Modest Small Slight

Reproduction courtesy of the National Cattlemens Beef Association and U.S.Department of Agriculture NLSMB.

7/30/2019 2 IMM Beef Marbling

2/2

B-13

Continued from B-12

1999U.S.

MeatExportFederation.

cates that the carcassescame from animals 9-30months of age at the timeof slaughter. Of all thebeef graded Prime,Choice and Select, all buta very small percentagewill fall into A carcassmaturity.

In order to grade Prime acarcass must displayModerately Abundant orSlightly Abundantdegrees of marbling. AChoice carcass must dis-play Moderate, Modest,or Small degrees of mar-bling. A carcass gradedSelect must display theSlight degree of marbling.

Moderately Abundant-Prime Grade

The minimum marblingfor average Prime.

Slightly Abundant-Prime Grade

The minimum marbling toqualify for the Prime grade.

Moderate-Choice Grade

The minimum marbling toqualify for high Choice.

Modest-Choice GradeThe minimum marbling toqualify for average Choice.

Small-Choice Grade

The minimum marbling toqualify for the Choice grade.

Slight-Select Grade

The minimum marbling toqualify for the Select grade.

These pictures are

reduced reproductions ofthe Official USDAMarbling Photographsprepared for the U.S.Department ofAgriculture by and avail-able from the NationalCattlemens BeefAssociation.

nos indican que las canalesprovienen de animales quecontaban con una edad deentre 9 y 30 meses almomento del sacrificio. Detoda la res clasificada comoPrime, Choice y Select, nicamente un porcentaje muypequeo cae en la clasifi-

cacin A.

Para poder recibir la clasifi-cacin Prime, la canal debemostrar un grado de mar-moleo ModeradamenteAbundante o LigeramenteAbundante. Una canal declasificacin Choice debemostrar un grado de mar-moleo Moderado, Mdico oPequeo. Una canal clasifi-cada como Select debemostrar un grado de mar-moleo Ligero.

Moderadamente Abundante -Grado Prime

Marmoleo mnimo para elgrado Prime.

Ligeramente Abundante -Grado Prime

Marmoleo mnimo para calificar para el grado Prime.

Moderado - Grado Choice

Marmoleo mnimo para calificar para el grado Choicealto.

Mdico - Grado Choice

Marmoleo mnimo para calificar para el grado Choicepromedio.

Pequeo - Grado Choice

Marmoleo mnimo para calificar para el grado Choice.

Ligero - Grado Select

Marmoleo mnimo para calificar para el grado Select.

Estas fotografas son copiasreducidas de las Fotografade Marmoleo Oficialespreparadas por elDepartamento deAgricultura de los EE.UU.disponibles a travs de laAsociacin Nacional deGanaderos.