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DNA Sire Requirements


Landrace Sire DNA Policy NEW!

As the result of an American Landrace Association Board of Directors decision on March 28, 2017, ALL Landrace sires must pass the DNA Breed Profile Test before any litters can be recorded, effective with litters farrowed on or after March 1, 2018 (breeding date ~November 1, 2017). No sires with litters previously recorded, or passing the previous stress or physical test mating requirements are exempt. Sires passing previous requirements, but failing the current requirement will not have their pedigrees cancelled – however, their progeny farrowed on or after March 1, 2018 will NOT be eligible for registration.

The same blotter card used for Stress testing and DNA banking will fulfill this requirement. The card currently banked for sires previously stress tested can be utilized for this DNA Breed Profile test. Please keep in mind, results from this test can take up to six weeks from the date the sample is received at the lab. Please submit DNA samples for Landrace boars early. Please contact DNA Secretary Whitney Webb (whitney@nationalswine.com) to order your previously banked sire sample tested as soon as possible to meet the new requirement.

Animals submitted for testing MUST have an NSR registration number. The current cost of the DNA Breed Profile Test is $80, in addition to the normal $25 HAL-stress test, $6 blood card, and $6 DNA banking fees. If you have previously stress tested and banked a sire, the additional cost for the DNA Breed Profile test is $80.

This new requirement replaces the current physical test mating requirement. Stress testing will still be required under the updated Sire Eligibility Requirements

For any other questions, please contact the Vice President of Global Technical Service, Dr. Doug Newcom (doug@nationalswine.com) or DNA Secretary, Whitney Webb (whitney@nationalswine.com).  

Yorkshire Sire DNA Policy NEW!

As the result of an American Yorkshire Club Board of Directors decision, ALL Yorkshire sires must be DNA tested for Breed Composition and Color before any litters can be recorded, effective with all DNA samples submitted on or after July 1, 2016. All current Yorkshire sires with a completed Physical Test Mating form on file, or have had previous litters recorded, are exempt.  This new requirement replaces the previous statute that only A.I. Service sires were required to have a completed Physical Test Mating.  The same blotter card used for Stress testing and DNA banking will fulfill this requirement.  Please keep in mind, results from this test can take up to six weeks from the date the sample is received at the lab.  Please plan your litter registrations accordingly and submit DNA samples for Yorkshire boars early.

Animals submitted for testing MUST have an NSR registration number.  The current cost of the test is $80, in addition to the normal $25 HAL-stress test, $6 blood card, and $6 DNA banking fees.

For any other questions, please contact the Vice President of Global Technical Service, Dr. Doug Newcom (doug@nationalswine.com) or DNA Secretary, Whitney Webb (whitney@nationalswine.com).  

Hampshire Sire DNA Policy

As the result of a Hampshire Swine Registry (HSR) Board of Directors decision, all Hampshire sires must be DNA tested for color before any litters can be recorded, effective beginning with all litters farrowed on or after July 1, 2014. This new requirement replaces the previous statute that only AI service sires were required to be DNA tested for color. The same blotter card used for Stress testing and DNA banking will fulfill this requirement. If you have a Hampshire boar banked in our system that needs to be DNA tested for color to meet the new requirement, please contact Whitney Webb (whitney@nationalswine.com). Please keep in mind, results from this test can take up to six weeks from the date the sample is received at the lab. Please plan your litter registrations accordingly. For any other questions, please contact the Vice President of Global Technical Service, Dr. Doug Newcom (doug@nationalswine.com).

Dead Boar Policy

NSR has updated policy on sire DNA requirements for recorded litters, effective Jan. 1, 2010. This change applies primarily to situations where a sire has died or was culled before DNA was collected, but also to instances where the DNA lab is unable to obtain a test result due to poor DNA quality. Since Jan. 1, the following must be met to satisfy the sire DNA requirement in instances where a quality sire DNA sample is not available:

  1. A minimum of four pigs from the litter must be tested and subsequently banked. If there are less than five head in the litter, 100 percent of the litter must be tested.
  2. OR, if the dam of the dead boar is available, a sample from her may be tested.
  3. For litters recorded out of A.I. Hampshire boars, this requirement also includes the color testing requirement.  For litters sired by a Yorkshire boar, this requirement also includes the DNA Breed Profile Test. 

Tests cannot be done overnight, so plan accordingly for registrations and show or sale deadlines.

DNA Stress Test Policy

As a requirement for registration of litters that are farrowed on or after July 1, 2004, all sires (Duroc, Hampshire, Landrace and Yorkshire) must have a negative stress status on file (by DNA test) before the litter can be registered. No animals will be grandfathered in with this policy.

1. As of April 1, 1998, no known stress positive or stress carrier animals will be allowed to be exhibited or sold at any NSR-sponsored event. (If an exhibitor places this information on his pen card or states that this animal is a stress positive or a stress carrier, he will be asked to remove this animal from the barn, and he will not be allowed to exhibit or sell this animal.) If any animal sold at a NSR-sponsored event is found to be stress-gene positive or a carrier of the stress gene, the purchaser has the right to receive a full refund of the purchase price.

DNA testing for the stress gene must be done within 90 days of the sale, and all cost associated with this test must be paid by the purchaser. The seller has the right to review the test results and the right to re-test the animal at a laboratory of his choice. Cost associated with the re-test by the seller is at the seller’s expense. There will be no refund of NSR commission from stress-positive or stress-carrier animals. * As of Jan. 1, 2000, the NSR requires the DNA stress gene status of A.I. sires to be declared on all A.I. Certificates issued for the registration of litters. All A.I. certificates issued after Jan. 1, 2000, must include the HAL 1843 test status of the sire, regardless of when the boar was placed in service. Test results must be reported as one of the following: 1) nm=normal, 2) mm=carrier, or 3) dm=homozygous positive. The NSR also recommends that owners of A.I. sires make this information available in their promotional literature.

In addition to the previous steps, the following policy was adopted by the Board of Directors of the American Yorkshire Club, the American Landrace Association, the United Duroc Swine Registry and the Hampshire Swine Registry with the effective dates indicated.

3.  Any Yorkshire or Landrace that is farrowed on or after Jan. 1, 2000, that is proven to be a stress positive or stress carrier by a documented DNA test from a certified lab, will have its pedigree cancelled. Any Duroc farrowed on or after Jan. 1, 2001, that is proven to be a stress positive or stress carrier by a documented DNA test from a certified lab, will have its pedigree cancelled. Any Hampshire farrowed on or after Jan. 1, 2002, that is proven to be a stress positive or stress carrier by a documented DNA test from a certified lab, will have its pedigree cancelled. The purchaser has the right to receive a full refund of the purchase price. DNA testing for the stress gene must be done within 90 days of the sale, and all cost associated with this test must be paid by the purchaser. The seller has the right to review the test results and the right to re-test the animal at a laboratory of his choice. Cost associated with the re-test by the seller is at the seller’s expense.

Any warranty regarding the stress gene status of the animal is solely that of the seller and not that of the American Yorkshire Club, American Landrace Association, Hampshire Swine Registry or the United Duroc Swine Registry. The American Yorkshire Club, American Landrace Association, Hampshire Swine Registry and United Duroc Swine Registry assume no liability in connection with such warranty by the seller.

DNA Banking Requirements

As the result of a NSR Executive Committee decision, all sires must be DNA banked before any litters can be recorded, effective with all litters farrowed after July 1, 2002. This new requirement will provide for the establishment of an incredible DNA data bank for the four NSR breeds, as well as help us in our effort to maintain breed purity.

This decision was made after much discussion, and was the result of a recommendation from the NSR Shows and Services Advisory Board, where it passed unanimously. All segments of our industry have weighed in on this issue, and it appears to be helpful for all members in the long run. Through the establishment of this DNA resource bank, Yorkshire, Duroc, Hampshire and Landrace breeders will have access to the largest and most-diverse DNA parentage bank in the industry.

As we continue to uncover more information about the genetic make-up of our hogs, and as the genetic map is more clearly defined, NSR members will be in a position to take advantage of any new discoveries that may impact genetic selection in the future. Whether it might be in the area of pork quality, disease resistance or production traits, the development of new genetic markers can quickly be matched to our existing genetic lines. It will position our breeds to once again be the leader in genetic improvement.

In addition to the selection opportunities it provides, this DNA data bank will also help maintain the purity and integrity of our breeds. This data bank might be utilized to verify the parentage of a pedigreed barrow that was named champion at a major show. On the other hand, it might be used to help a breeder, who after losing his breeding records, needs to use the DNA genotypes to match up offspring on some matings. Regardless, this DNA information will be a valuable resource to all of our breeds and members.

In an effort to minimize the expense and time required for this new regulation, your NSR Executive Committee has approved the use of “blotter cards” for the collection of this DNA material. Rather than contacting your veterinarian to draw blood from each of your sires, you will simply prick the ear of your animal and dab a small amount of blood on a blotter card, and submit to the NSR office for storage. There will be a nominal fee of $10 for each sample submitted to help defray the costs of the blotter card and storage records.

Please contact the NSR office to request the blotter cards for your boars that need to be DNA banked.