The Belgian Blue (, , both literally meaning "Belgian White-Blue") is a breed of

beef Beef is the culinary name for meat from cattle (''Bos taurus''). Beef can be prepared in various ways; Cut of beef, cuts are often used for steak, which can be cooked to varying degrees of doneness, while trimmings are often Ground beef, grou ...

cattle Cattle (''Bos taurus'') are large, domesticated, bovid ungulates widely kept as livestock. They are prominent modern members of the subfamily Bovinae and the most widespread species of the genus '' Bos''. Mature female cattle are calle ...

from

Belgium Belgium, officially the Kingdom of Belgium, is a country in Northwestern Europe. Situated in a coastal lowland region known as the Low Countries, it is bordered by the Netherlands to the north, Germany to the east, Luxembourg to the southeas ...

. It may also be known as the , or (literally "fat buttocks" in Dutch). Alternative names for this breed include Belgian Blue-White; Belgian White and Blue Pied; Belgian White Blue; Blue; and Blue Belgian. The Belgian Blue's extremely lean, hyper-sculpted, ultra-muscular physique is termed " double-muscling". The double-muscling

phenotype In genetics, the phenotype () is the set of observable characteristics or traits of an organism. The term covers the organism's morphology (physical form and structure), its developmental processes, its biochemical and physiological propert ...

is a heritable condition caused by a deletion in the

myostatin Myostatin (also known as growth differentiation factor 8, abbreviated GDF8) is a protein that in humans is encoded by the ''MSTN'' gene. Myostatin is a myokine that is produced and released by myocytes and acts on muscle cells to inhibit muscle ...

gene, resulting in an increased number of muscle fibres (

hyperplasia Hyperplasia (from ancient Greek ὑπέρ ''huper'' 'over' + πλάσις ''plasis'' 'formation'), or hypergenesis, is an enlargement of an organ or tissue caused by an increase in the amount of Tissue (biology), organic tissue that results from ...

), instead of the (normal) enlargement of ''individual'' muscle fibres (

hypertrophy Hypertrophy is the increase in the volume of an organ or tissue due to the enlargement of its component cells. It is distinguished from hyperplasia, in which the cells remain approximately the same size but increase in number. Although hypertro ...

). This particular trait is shared with another breed of cattle known as

Piedmontese Piedmontese ( ; autonym: or ; ) is a language spoken by some 2,000,000 people mostly in Piedmont, a region of Northwest Italy. Although considered by most linguists a separate language, in Italy it is often mistakenly regarded as an Italian ...

. Both of these breeds have an increased ability to convert feed into lean muscle, which causes these particular breeds' meat to have a reduced fat content and reduced tenderness. The Belgian Blue is named after its typically blue-grey mottled hair colour; however, its actual colour can vary from white to black.

History

The breed originated in central and upper

in the 19th century, from crossing local breeds with a

Shorthorn The Shorthorn breed of cattle originated in the North East of England in the late eighteenth century. The breed was developed as dual-purpose, suitable for both dairy and beef production; however, certain blood lines within the breed always em ...

breed of cattle from the United Kingdom.

Charolais cattle The Charolais () or Charolaise () is a French breed of taurine beef cattle. It originates in, and is named for, the Charolais area surrounding Charolles, in the Saône-et-Loire department, in the Bourgogne-Franche-Comté region of eastern Fr ...

possibly were cross-bred, as well. Belgian Blue cattle were first used as a

dairy A dairy is a place where milk is stored and where butter, cheese, and other dairy products are made, or a place where those products are sold. It may be a room, a building, or a larger establishment. In the United States, the word may also des ...

and

breed. The modern beef breed was developed in the 1950s by Professor Hanset, working at an

artificial insemination Artificial insemination is the deliberate introduction of sperm into a female's cervix or uterine cavity for the purpose of achieving a pregnancy through in vivo fertilization by means other than sexual intercourse. It is a fertility treatment ...

centre in

Liège Province Liège ( ; ; ; ; ) is the easternmost province of the Wallonia region of Belgium. Liège Province is the only Belgian province that has borders with three countries. It borders (clockwise from the north) the Dutch province of Limburg, the ...

. The breed's characteristic gene mutation was maintained through

linebreeding Inbreeding is the production of offspring from the mating or breeding of individuals or organisms that are closely related genetically. By analogy, the term is used in human reproduction, but more commonly refers to the genetic disorders an ...

to the point where the condition was a fixed property in the Belgian Blue breed. In 1978, Belgian Blue cattle were introduced to the United States by Nick Tutt, a farmer from central Canada who emigrated to

West Texas West Texas is a loosely defined region in the U.S. state of Texas, generally encompassing the desert climate, arid and semiarid climate, semiarid lands west of a line drawn between the cities of Wichita Falls, Texas, Wichita Falls, Abilene, Texa ...

and showed the cattle to universities in the region. The Belgian Blue has been exported to many parts of the world; it is reported to

DAD-IS DAD-IS is the acronym for the Domestic Animal Diversity Information System, a tool developed and maintained by the Food and Agriculture Organization of the United Nations as a part of its programme for management of animal genetic resources for ...

by twenty-four countries, in Africa, the Americas, Europe and Oceania. Of these, ten report population data; in 2022 the worldwide population was estimated to be .

Characteristics

The Belgian Blue has a natural

mutation In biology, a mutation is an alteration in the nucleic acid sequence of the genome of an organism, virus, or extrachromosomal DNA. Viral genomes contain either DNA or RNA. Mutations result from errors during DNA or viral replication, ...

in the

gene which codes for the protein,

("myo" meaning muscle and "statin" meaning stop). Myostatin is a protein that inhibits muscle development. This mutation also interferes with fat deposition, resulting in very lean meat. The truncated myostatin gene is unable to function in its normal capacity, resulting in accelerated lean muscle growth. Muscle growth is due primarily to physiological changes in the animal's muscle cells (fibres) from hypertrophy to a hyperplasia mode of growth. This particular type of growth is seen early in the fetus of a pregnant dam, which results in a calf that is born with two times the number of muscle fibres at birth than a calf with no myostatin gene mutation. In addition, a newborn double-muscled calf's birth weight is significantly greater than that of a normal calf. Belgian Blue cattle have improved

feed conversion ratio In animal husbandry, feed conversion ratio (FCR) or feed conversion rate is a ratio or rate measuring of the efficiency with which the bodies of livestock convert animal feed into the desired output. For dairy cows, for example, the output is milk ...

(FCR) due to lower feed intake compared to weight gain due to an altered composition of body weight gain which includes increased protein and decreased fat deposition. The Belgian Blue's bone structure is the same as normal cattle, albeit holding a greater amount of muscle, which causes them to have a greater meat to bone ratio. These cattle have a muscle yield around 20% more on average than cattle without the genetic

mutation. Because of this breed's increased muscle yield, a diet containing higher protein is required to compensate for the altered mode of weight gain. During finishing, this breed requires high-energy (concentrated) feeds, and will not yield the same results if put on a high-fibre diet.

Breed problems

Double-muscled cows routinely experience

dystocia Obstructed labour, also known as labour dystocia, is the baby not exiting the pelvis because it is physically blocked during childbirth although the uterus contracts normally. Complications for the baby include not getting enough oxygen which ...

– difficulty in parturition – even when bred to normal beef bulls or dairy bulls, because of a narrower birth canal; the birth weight and width of the calf also may be higher than in animals without the double-muscling gene. Calves are commonly born by

Caesarean section Caesarean section, also known as C-section, cesarean, or caesarean delivery, is the Surgery, surgical procedure by which one or more babies are Childbirth, delivered through an incision in the mother's abdomen. It is often performed because va ...

; cows may be able to survive five or six deliveries of this type. In bulls, testicular weight and

semen Semen, also known as seminal fluid, is a bodily fluid that contains spermatozoon, spermatozoa which is secreted by the male gonads (sexual glands) and other sexual organs of male or hermaphrodite, hermaphroditic animals. In humans and placen ...

quantity and quality are lower than in other cattle, perhaps because of the greater amount of connective tissue in the testicles. however this is less of an issue when compared to the dam's difficulties in calving.

Economic efficiency

The economics of breeding and raising Belgian Blue cattle are inconclusive because of complications experienced during parturition and metabolic demand for more concentrated feeds. The breed's increased need to have Caesarean sections when calving means increased cost and added work, and can become a welfare issue. However, the carcass value of double-muscled animals may be enhanced due to increased dressing yield, lean carcass content, and upgrading of some cuts leading to a higher proportion of higher valued cuts. The slower rate of fat deposition causes slaughtering to be delayed in most cases, which means an increase in maintenance costs in those animals. Belgian Blue cattle require more skilled management and do not thrive in harsh environments. For these reasons and others, the breed's overall production efficiency in an economic sense is still unclear.

References

{{reflist, 45em, refs= Barbara Rischkowsky, Dafydd Pilling (editors) (2007)
List of breeds documented in the Global Databank for Animal Genetic Resources
annex t
''The State of the World's Animal Genetic Resources for Food and Agriculture''
Rome: Commission on Genetic Resources for Food and Agriculture, Food and Agriculture Organization of the United Nations. {{ISBN, 978-92-5-105762-9. Archived 23 June 2020. Valerie Porter, Lawrence Alderson, Stephen J.G. Hall, D. Phillip Sponenberg (2016)
''Mason's World Encyclopedia of Livestock Breeds and Breeding''
(sixth edition). Wallingford: CABI. {{ISBN, 978-1-78064-794-4. Breed data sheet: Blanc-Bleu Belge / Belgium (Cattle)
Domestic Animal Diversity Information System of the Food and Agriculture Organization of the United Nations. Accessed June 2022. Transboundary breed: Belgian Blue
Domestic Animal Diversity Information System of the Food and Agriculture Organization of the United Nations. Accessed June 2022. Marleen Felius (1995)
''Cattle Breeds: An Encyclopedia''
Doetinchem, Netherlands: Misset. {{ISBN, 978-90-5439-017-6. Valerie Porter (ed.), Ian Lauder Mason (2002)
''Mason's World Dictionary of Livestock Breeds, Types and Varieties''
(5th edition). Wallingford: CABI. {{ISBN, 0-85199-430-X. {{cite book, last=Cheville, first=Norman F., year=1999, title=Introduction to veterinary pathology, publisher=Wiley-Blackwell, isbn=978-0-8138-2496-3, url=https://books.google.com/books?id=U-OF4rmihIUC Cattle breeds originating in Belgium