GENE BANK FOR PIG GENETIC RESOURCES: THE ITALIAN EXPERIENCE WITHIN THE EUROPEAN CONTEXT The conservation of local breeds within their production systems integrated with the cryoconservation of genetic material (gametes, embryos, somatic cells) allows to achieve the different conservation objectives. Cryoconservation can be used as a complementary tool for managing genetic variation in the live population and as a back up in case of extinction of the breed. In the framework of the EC European Gene banking project for the pig genetic resources (GENRES) , in 2000 the IBBA-CNR in collaboration with several private and public institutions created the Semen Bank of Italian Pig breeds . Recently several programs for the creation of cryobanks have been started in different European countries. Several aspects are linked to the creation and development of cryobanks which are still open to discussion, such as funding sources, structure of the bank, ownership of the genetic material, research on cryoconservation techniques in different species and costs reduction. We investigated the possibility of minimizing the number of semen doses and reducing costs of pig semen banks. We assumed the storage of semen to re-establish the breed in case of extinction, from 25 boars. We analysed the number of doses according to number of fertile females for double A.I. (f), which is function of conception rate, number of born alive and survival at breeding age. Conception rates of 35, 50 and 65%, 6 to 10 born alive and 50 to 70% survival rate at breeding age were considered. With f=1 and the creation, for security reason, of two storage sites, we need to store 600 semen doses per breed, with 70% reduction compared to the 2,080 semen doses adopted in the GENRES program. Costs for the creation of a semen bank were analyzed according to both number of semen doses to be stored and boar training period for semen collection (8 or 23 weeks). Assuming f equal 1, the reduction of semen doses from 2,080 to 600 allows to save approximately 25,000 per breed.
Banca delle risorse genetiche suine: esperienza italiana nel contesto europeo.
Pizzi F;
2003
Abstract
GENE BANK FOR PIG GENETIC RESOURCES: THE ITALIAN EXPERIENCE WITHIN THE EUROPEAN CONTEXT The conservation of local breeds within their production systems integrated with the cryoconservation of genetic material (gametes, embryos, somatic cells) allows to achieve the different conservation objectives. Cryoconservation can be used as a complementary tool for managing genetic variation in the live population and as a back up in case of extinction of the breed. In the framework of the EC European Gene banking project for the pig genetic resources (GENRES) , in 2000 the IBBA-CNR in collaboration with several private and public institutions created the Semen Bank of Italian Pig breeds . Recently several programs for the creation of cryobanks have been started in different European countries. Several aspects are linked to the creation and development of cryobanks which are still open to discussion, such as funding sources, structure of the bank, ownership of the genetic material, research on cryoconservation techniques in different species and costs reduction. We investigated the possibility of minimizing the number of semen doses and reducing costs of pig semen banks. We assumed the storage of semen to re-establish the breed in case of extinction, from 25 boars. We analysed the number of doses according to number of fertile females for double A.I. (f), which is function of conception rate, number of born alive and survival at breeding age. Conception rates of 35, 50 and 65%, 6 to 10 born alive and 50 to 70% survival rate at breeding age were considered. With f=1 and the creation, for security reason, of two storage sites, we need to store 600 semen doses per breed, with 70% reduction compared to the 2,080 semen doses adopted in the GENRES program. Costs for the creation of a semen bank were analyzed according to both number of semen doses to be stored and boar training period for semen collection (8 or 23 weeks). Assuming f equal 1, the reduction of semen doses from 2,080 to 600 allows to save approximately 25,000 per breed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
