Factors that will determine the success of practical pig breeding / pig farming “Well-planned breeding objectives: The ultimate objective is to improve profitability, where: Profit (P) = Returns(R) - Cost(C) or P = R - C. Hence, only traits that have a significant economic value (and which will improve profitability) should therefore be included in the breeding objective. Once the breeding objective has been finalized and the most important economic traits identified, economic weights must be allocated to the overall objective. Re-evaluation of the economic weights must be done on a regular basis (every two to three years). The estimation of genetic parameters should be conducted every four to five years in order to keep the breeding objectives relative and related to market (user & consumer) demands. The choice of the most effective pig breeding programme. This will largely be determined by the traits and their genetic relationships (the production system will also influence traits to be included in a breeding objective). The purchase of genetically superior animals from reputable breeding companies, stud breeders or multiplier herds. This aspect is particularly important when establishing a breeding herd - right from the beginning. Knowledge of the size of the various breeds that are available, as continued genetic improvement is influenced by the following: o Increased selection pressure as a result of increased numbers that are performance tested (while the opposite is also true). o Availability of sufficient variation (the raw material of genetic improvement) which will slow down attaining the selection limit. The availability of unique genes, which could comply with changing market requirements in future. Careful record-keeping, easy identification of all breeding animals and their progeny (24 x 7 x 365) and prudent use of BLUP (along with high accuracy of breeding values) and genomics in future. Breeding animals must be compared in the right contemporary groups. The application of AI within a herd should be > 90%. Identify and evaluate the genetic supplier carefully, ascertain the availability of the pig breed on a national and international basis (size of gene pool) and pay realistic and affordable prices for breeding animals. Bio-security and high health have become synonymous with modern pig production. Differentiation of sire and dam lines and traits to select for in each line are summarized” Excerpt: Modern Pig Production
A study by Kruger (2015) where the genetic analysis of the performance of 87 121 progeny that were born and performance tested from 3 152 AI boars from local and imported sires were compared over a period of 14 years (2000 - 2014), have indicated limited superiority of the imported semen. Hence, it is very important to use the right methods to identify those very top performing AI boars
The F1-crossbred pig in South Africa The classical F1 crossbred sow, is the result of crossing the Large White pig breed and the Landrace pig breed as well as their resipirocal cross. These animals form the basis of numerous commercial production units locally and abroad. The resultant hybrid vigour is achieved in all the reproductive traits and to a lesser extent in the production and carcass traits. The progeny of crossbred sows are known to grow better pre-weaning whereas the F1 sow produce more milk (a higher litter weaning weight), as well as more piglets per litter that are robust and that generally survive better.
Please see the Juventis: Pig Breeds page for more information on the Duroc, Landrace and Large White pig breeds in South Africa
Copyright © Juventis | Website Design by Juventis Studio
Worldwide pig breeding had been commercialized, with less breeding companies and less private breeders, each securing a bigger pro rata market share respectively. By introducing new genotypes in new environments, cognisance must be taken of genotype x environmental interactions - especially during the initial post introduction years. This phenomenon has a biological, adaptive and genetic connectivity basis. The crossing of different purebred pig breeds or the crossing of different genotypes will still be the future of nucleus and commercial pig production. Today more advanced tegnology and biotechnology as well as internationally connected databases and genomic information are being used in international pig breeding programs. It stands to reason that positive heterosis can only be generated from purebreds or genotypes that show a continious and upward spiral of genetic progress.
Juventis GeneTrade Juventis GeneTrade: Sourcing, visual appraisal and selection of customer spesific quality pig genetics and pig products for pig breeding South Africa and abroad (AGSA). Focussing on specific mandate driven requests.