The objective of the present study was to describe the frequency of the main racial traits of Morada Nova sheep and simulate the impact of this culling on the response to selection for birth weight. The data from sex, coat colour, hoof pigmentation, muzzle pigmentation, polled and cryptorchidism were collected individually at weaning from 385 Morada Nova sheep of the red variety, born between 2010 and 2012, which belonged to four different flocks in the state of Ceará, Brazil. To estimate the impact of culling of animals due to racial pattern on the genetic improvement of the Morada Nova population, the genetic gains in birth weight per generation were calculated considering the following different scenarios of culling due to racial pattern in a simulated population. The present results indicate that the most urgent step is flexibilization of the requirement of dark muzzles and hooves. The selection of Morada Nova sheep based on racial pattern has caused losses in the genetic gain for productive traits such as birth weight. Readaptation of the official racial pattern established for Morada Nova sheep is necessary so that the racial pattern is achieved and an adequate number of animals will be available for selection.

Serrana de Teruel is an endangered cattle breed raised traditionally in the mountainous areas of Southern Aragon (Spain). With the aim of recovering the breed, a characterization was carried out to determine the morphology, husbandry and genetic values of the Serrana de Teruel breed. Individuals showed a medium to high degree of homogeneity and harmony, most of the animals being of straight profile, and eumetrical and sublongilineal individuals, although smaller in size than other phylogenetically proximate breeds. Biodiversity studies showed good diversity values despite the breed's low effective population size (240 individuals in 2010). These studies provided the basis for a sustainable programme of genetic conservation. In order to guarantee long-term maintenance, germplasm banks contain 6400 doses of semen and 74 embryos. Concurrently, the commercial viability of the breed was studied by means of an analysis of carcass and meat quality from three commercial categories – yearling, bull and steer (castrated at 9 months old) – with ages at slaughter of 12, 22 and 22 months and live weights of 470, 720 and 660 kg,, respectively. Good performances and high-quality products with no commercial constraints in the beef market were obtained. Finally, a prospective study for a new beef quality product labelled ‘Serrana de Teruel’ was performed, according to the opinions of experts. These studies provide the standard requirements for the alternative production of a labelled beef product that might create an incentive for the production of the Serrana de Teruel breed among other breeds, and thus favour the conservation of the breed in the medium term.

The local Brazilian breed of cattle known as Curraleiro is at risk of extinction. As a result a group of researchers have taken action to conserve and utilize these animals. The Curraleiro breed is descended from cattle brought to Brazil by Iberian colonizers. These animals have adapted to pasture of low quality, very low humidity conditions, heat and other adverse factors characteristic of the Brazilian savannah. A population census was conducted and, in order to identify the characteristics of Curraleiro breeders, 28 farmers in the states of Goiás and Tocantins were interviewed using a semi-structured questionnaire, eliciting information about them, their farms and their animals. The type of production system and the level of technology applied in the farms were determined in each case. Forty-nine herds, with a a total of 3,692 animals, were located in the states of Goiás, Tocantins, Bahia, Pará and Piaui. The production system applied to Curraleiro livestock herds is extensive, with a medium level of technology, low production costs and low economic returns. The risk of inbreeding is evident and there is great concern and interest on the part of producers in conserving this breed. Because the national census of these cattle is low, this breed can be considered vulnerable and at risk of extinction.

A la suite de la conférence des Nations Unies sur l'environnement et le développement (CNUCED, Rio 7 juin 1992) et la convention globale sur la biodiversité, la FAO a programmé neuf missions à travers le monde pour identifier des projets pouvant contribuer à la conservation des ressources génétiques des animaux domestiques. Le présent papier expose le résultat de la mission concernant les pays d'Afrique francophone sub-saharienne. L'approche des races est fondée sur la prise en compte des contraintes du milieu, des objectifs de l'élevage, des marchés des produits et des structures sociales impliquées. L'inventaire fait ressortir la grande diversité des races d'animaux de ferme, liée à la diversité des modèles d'élevage et de leurs objectifs. Les races sont mal caractérisées, leurs effectifs sont mal connus. Les types génétiques sont adaptés à des modèles d'élevage en pleine évolution sous l'influence des marchés des produits et de la pression démographique. Les élevages intensifs (villageois ou industriels) se développent plus vite que les élevages extensifs (pastoraux ou de basse-cour). Il en résulte que les caractères génétiques privilégiés par les éleveurs évoluent profondément. Il est donc nécessaire de mieux caractériser les races d'animaux de ferme et de rechercher les critères d'adaptation du cheptel à une exploitation plus intensive et mieux orientée.