SA Stud Book Articles

Articles


SA Stud Book has excellent animal scientists and geneticists who regularly write and publish for popular and scientific journals. Some of the articles are listed below.

1. General Articles

The Ultimate Toolkit in Precision
1.1. The Ultimate Toolkit in PrecisionNew
Author: Dr Japie van der Westhuizen

Grain and other crop producers have popularised the phrase precision farming. One definition of the word precision refers to the closeness of two or more measurements to each other. It therefore relates to consistency when repeating the same observation, rather than to the accuracy of such an observation or measurement. Repeating the same mistake with high precision can have disastrous consequences Learn more...
Stud Book's genetic evaluations
1.2. Stud Book's genetic evaluations for dairy cattleNew
Author: SA Stud Book

The genetic evaluation of a breed involves estimating its breeding values by means of internationally accepted methods. It also includes the estimation of hereditability and genetic correlations between traits. Breeding values are the most accurate tool for selecting animals. SA Stud Book uses best linear unbiased prediction (BLUP) methodology, a method used across the world to estimate breeding values in beef and dairy cattle, sheep, goats and pigs. Learn more...
SABeefBulls.com an exceptional tool
1.3. SABeefBulls.com an exceptional tool for breeders
Author: SA Stud Book

The last 30 years of the last century heralded the so-called 'information era'. One of the major characteristics of the time we live in, is the shift toward making information available to everyone, to make informed decision-making possible. It puts the onus on everyone not to be overwhelmed by the enormous information wave, but to identify the applicable portions and use them correctly. The same applies to animal husbandry and genetics. Learn more...
Stud Book's genetic evaluations
1.4. Stud Book's genetic evaluations for beef cattle
Author: SA Stud Book

The genetic evaluation of a breed involves estimating its breeding values by means of internationally accepted methods. It also includes the estimation of hereditability and genetic correlations between traits. Breeding values are the most accurate tool for selecting animals. SA Stud Book uses best linear unbiased prediction (BLUP) methodology, a method used across the world to estimate breeding values in beef and dairy cattle, sheep, goats and pigs. Learn more...
The role of Breeders' Societies
1.5. The role of Breeders' Societies
Author: SA Stud Book

The Animal Improvement Act, 1998 (Act 62 of 1998) defines an animal breeders’ society as follows: “It is a group of persons promoting the breeding, the recording or registration, the genetic improvement and the use of a kind of animal or an animal of a specified breed of such kind of animal, determining and applying breed standards, recommending in its sole discretion the recording or registration of an animal or a specified breed of a kind of animal bred in or imported into the Republic... Learn more...
SA Stud Book Technical Advisors
1.6. SA Stud Book has technical advisers in the field
Author: SA Stud Book

SA Stud Book, the association that belongs to breeders’ societies, is known for the fact that it provides a complete package of livestock improvement services to the South African livestock industry as well as in other countries, especially in Southern Africa. Learn more...
Logix Milk Genomic Selection Service
1.7. Logix Milk Genomic Selection Service
Author: SA Studbook

The development of molecular technology and mapping of the genomes of farm animals, have led to new developments for selection and genetic improvement of livestock populations. SA Stud Book has implemented a unique genomic selection service for SA Holstein, Jersey and Ayrshire breeders which considerably increases the reliability of the estimation of breeding values by including genomic information on young animals. Learn more...
Stemma Animalia's Secretariat
1.8. Excellent Services from Stemma Animalia's Secretariat
Author: Stud Book

Secretariat Services, in cooperation with SA Stud Book, was founded in 1958 under the leadership of JP du Plessis and included eight breeds. When these services were first established, it was based at the former Stud Book building in Aliwal Street, Bloemfontein. During that early period, the secretariat thrived and the number of breeds that were offered services increased to 21. Learn more...
Technology – a resource to drive profit in beef operations
1.9. Technology – a resource to drive profit in beef operations
Author: Japie van der Westhuizen

Breeding and associated genetic technologies can make a difference to the bottom line in beef cattle herds, says Japie van der Westhuizen of SA Stud Book. Learn more...
USA expert in Genetics and breeding speaker at 2016 Elite Symposium
1.10. USA expert in Genetics and breeding speaker at 2016 Voermol and Stud Book Elite Symposium
Author: Dr Pierre van Rooyen

Voermol / Stud Book Elite 2016 Breeding Symposium will take place next year on Wednesday, 4 May during the annual Bloem Show. Prof. Darrh Bullock, Professor of Extension: Animal Genetics and breeding of the University of Kentucky in the United States will act as keynote speaker. Learn more...
Werk teelwaardes vir vrugbaarheid regtig?
1.11. Werk teelwaardes vir vrugbaarheid regtig?
Author: Yvette Steyn, SA Stamboek

Vrugbaarheid is die belangrikste eienskap in enige telingsisteem. Niks groei so stadig soos ‘n dooie kalf nie… ‘n Koei wat uitgawes vereis sonder on enige uitsette te lewer het geen plek in ‘n produktiewe kudde nie. Anders as melkbeeste, melk- en haarbokke, wolskape en lê-henners gee vleisbeeste eers finale produkte na hulle dood. Gedurende die “onproduktiewe” periodes is dit selfs meer belangrik vir hierdie diere om so veel as moontlik voort te plant.  Learn more...
Contradictions between EBVs and performance
1.12. Contradictions between EBVs and performance
Author: Yvette Steyn

Sometimes farmers observe discrepancies between breeding values and the performance observed on their farm as well as the difference between the progeny of the same bull on different farms. This is not always the case and in general breeding values are trustworthy and essential tools in the selection of animals. There are various sources of information to estimate breeding values and they must be understood to interpret and use EBVs more effectively. Learn more...
Waarom aanteken in jou melk-onderneming?
1.13. Waarom aanteken in jou melk-onderneming?
Author: Drs Bernice Mostert, Robert van der Westhuizen & Japie van der Westhuizen

Deur aan te teken wat presies gebeur in sy melk-onderneming, gebruik 'n melkboer 'n baie unieke hulpmiddel wat die regte bestuurs- en telingsbesluite waarborg. Learn more...
Wat sê Suid-Afrika se Melkbokdata?
1.14. Wat sê Suid-Afrika se Melkbokdata?
Author: DrBernice Mostert, SA Stamboek

Entoesiasme vanaf die Suid-Afrikaanse Melkboktelersgenootskap het SA Stamboek genoodsaak om in diepte na die data van melkbokrasse op Logix te gaan kyk en moontlikhede vir genetiese ontledings te ondersoek. Die grootste melkbokras in Suid-Afrika is die Saanen, met stamboominligting van net meer as 24 350 diere wat sedert 1946 aangeteken is. Learn more...
Why Milk Urea Nitrogen is important
1.15. Why Milk Urea Nitrogen is Important
Author: Japie van der Westhuizen, SA Stamboek

Why Milk Urea Nitrogen is important to dairy farmers and why a bulk tank sample is not giving adequate information for management decisions. The variation in MUN in a herd is large. The standard deviation (SD) is estimated to be ±3 to 4 MUN units. This means if the true value is 14, two thirds of the cows will vary from 10 to 18 (using ±4 SD units).  Learn more...
Boxers Join SA Stud Book
1.16. Boxers Join SA Stud Book
Author: Courtesy of the FBCSA

The Federation of Boxer Clubs of South Africa (FBCSA) is the official registered breed society for Boxer dogs in South Africa under the Animal Improvement Act (no. 62 of 1998). They started using SA Stud Book as their service provider in 2013 for the registration of their dogs, as well as for capturing and managing data of interest on their breed. Learn more...
Logix Milk Suiwelvaarstatistieke
1.17. Logix Milk Suiwelvaarstatistieke
Author: Dr Bobbie van der Westhuizen, SA Stamboek

Data van voltooide laktasies vir die tydperk van 13 November 2012 tot 12 November 2013, soos aangeteken op LogixMilk - wat deur SA Stamboek en die Diereverbeteringsvereniging bestuur word, is afgelaai en instressante statistieke is bereken. Slegs 305-dag opbrengste is ingesluit, terwyl kort laktasies, bv. laktasie wat voor 240 dae in melk (4 949) geëindig het, sowel as laktasies van koeie met onbekende vaars (7 653) uitgesluit is van hierdie statistieke Learn more...
Logix Milk Genetic Evaluations for the Ayrshire breed
1.18. Logix Milk Genetic Evaluations for the Ayrshire breed
Author: Drs BE Mostert, RR van der Westhuizen, HE Theron, J van der Westhuizen

Breeding values have recently been released for the SA Ayrshire breed from the brand-new Logixmilk Genetic Evaluation System of SA Stud Book. This entailed development of methodology according to international standards and guidelines. The main aim of the development was to stay in line with the latest scientific evolutions, needs from the industry and also to increase stability and accuracy of the estimated breeding values. Learn more...
Longevity of SA dairy populations
1.19. Longevity of SA dairy populations
Author: Drs BE Mostert & RR van der Westhuizen

Genetic evaluations for longevity have only recently (2012) been introduced in South Africa for dairy populations participating in LogixMilk Recording. The trait implemented to measure longevity, is functional herd life, which corrects for differences due to production and therefore indicates the involuntary culling risk of a sire’s daughters, thus culling for reasons other than production, e.g. due to constant occurrence of diseases, poor reproduction, functional problems and death. Learn more...
Making sense out of maturity types in beef cattle
1.20. Making sense out of maturity types in beef cattle
Author: Japie van der Westhuizen, SA Stamboek

Due to long term selection and possible evolutionary changes to adapt to different environments and production systems, beef cattle breeds differ in mature size and therefore can also be classified as different maturity types. Learn more...
Accelerating genetic progress
1.21. Accelerating genetic progress
Author: Drs Bernice Mostert, Robert van der Westhuizen & Japie van der Westhuizen

Holstein traits have been accepted in international genetic evaluations and South Africa can now present foreign breeding sires valuable to local breeders. Drs Bernice Mostert, Robert van der Westhuizen & Japie van der Westhuizen report. Learn more...
Performance recording in small stock
1.22. Performance recording in small stock
Author: Yvette Steyn & Siebert Vermeulen

There is always room for improvement in any production system and the small stock industry is no exception. It is therefore important for all breeders to be aware of the current level of performance in their herd to be able to set goals and monitor any changes. Performance recording and analyses thereof are excellent selection- and management aids to increase profitability of farming through the identification of more efficient, high producing animals.  Learn more...
Performance recording and genetic selection
1.23. The importance of performance recording and genetic selection
Author: Yvette Steyn, SA Stamboek

Many decades have passed in which farmers have selected animals as parents for the future generation solely based on 'the eye'. The best looking animals are selected from the group to stay on and reproduce. This has often been applied successfully…or has it? Success cannot be measured if there are no historic or current records. More successful progress could have been made with relevant measurements, fair comparison and additional information. Learn more...
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