Cross-breeding with European beef breeds has become a standard approach for the intensification of smallholder cattle production in Indonesia. This study assessed the environmental impact of cross-breeding, in terms of Global Warming Potential (GWP) and land use. We sampled 90 local Ongole and 162 cross-bred (Simmental × Ongole) cattle farms in four study areas. Expressed per kilogram of live weight of young stock produced, GWP (26.9 kg CO2–equivalents) and land use (34.2 m2) of farms with Ongole breeding stock were not significantly different from the GWP (28.9 kg CO2–equivalents) and land use (37.4 m2) of cross-bred farms. Cross-bred young stock grew faster, but in general cross-bred cattle required more feed. In the current smallholder production system, the dominant cross-breeding practice of using Simmental semen on Ongole and F1 cross-bred cows does not result in lower greenhouse gas emissions or land use per kilogram of live weight produced compared with farms with Ongole cows. The advantage from the faster growth of cross-breds is counteracted by the higher emissions from feed production for cross-breds.

Sheep breeding is a traditional activity in Peru for small farmers, who generally possess Creole animals, which are frequently ignored in public policies as well as by the scientific community, not being recognized as a breed, showing poor productivity and having crosses with exotic breeds. This study aimed to characterize Creole and Hampshire Down crossbred ewes phenotypically, for using in the conservation and improvement of the Peruvian creole sheep. The year 2012, in the rural municipality of Ite, southern coast of Peru, 200 adult ewes were evaluated, classified by possible genotype (Creole or crossbred) and farm type (wetlands or ranches). Morphological and morphometric measurements were analysed; indices were drawn up and canonical and discriminant analysis were conducted, using the statistical program R. The results showed crossbred ewes with greater meat-producing capacity than the Creole, both influenced by the environment, management, and racial miscegenation that threatens the native sheep conservation. The adaptation of flocks was seen in different conditions, but some traits must be improved, requiring adequate technical orientation and rural extension services.

Turkey's 21.8 million head of sheep comprise a rich array of fat-tailed and thin-tailed native breeds and crosses of these with animals of exotic origin. The structure of agriculture is such that most farms are predominantly subsistence oriented, of small size, keep few animals and provide only minimal inputs. Native breeds have evolved to meet these conditions and are generally well adapted to the natural environment, inadequate and unbalanced nutrition and disease stress. In the last 80 years, there have been attempts to modify the natural gene pool and many distinct breed types are in danger of or have already suffered extinction. This paper describes some of the major sheep genetic resources and their conservation status. The government is now aware of the danger of impoverishment or loss of this important aspect of biodiversity and has established programmes for conservation and preservation of several native breeds. Government, research institutions and producers should work together to ensure that the local gene pool is preserved and can thus continue to contribute to biodiversity and sustainable livestock production.

This paper reviews experiences with cross-breeding for milk production in the tropics. Data were compiled from 23 different studies evaluating the performance of different grades of cross-bred animals as well as local breeds. Relative performance of indigenous breeds compared with different grades of cross-breeds was calculated for three climatic zones. Traits considered were milk yield per lactation, age at first calving, services per conception, lifetime milk yield and total number of lactations completed. At 50 percent Bos taurus blood, lactation milk yields were 2.6, 2.4 and 2.2 times higher than those of local cattle in the highland, tropical wet and dry, and semi-arid climatic zones, respectively; lactation lengths increased by 1.2, 1.2 and 1.9 months in the above-mentioned climatic zones, respectively; there was a reduction in calving interval by 0.8 times and in age at first calving by 0.9 times. Similarly, cross-breds with 50 percent B. taurus genes had 1.8 times higher lifetime milk yields and a 1.2 times higher number of total lactations. Although cross-breeding faces a number of challenges such as better infrastructure, higher demand for health care, there are many advantages of using it. These are higher production per animal, higher income for the families and provision of high-value food. It is therefore likely to continue to be an important livestock improvement tool in the tropics in the future, where farmers can provide sufficient management for maintaining animals with higher input requirements and access to the milk market can be secured.

Goats were first domesticated in Turkey some 10 000–11 000 years ago. The country's population of 5.1 million goats in 2009 (down from 24.6 million in 1960) are still an important livelihood asset for smallholder farmers and nationally are a rich array of farm animal genetic resources of current enormous and future inestimable value. The structure of agriculture is such that most farms are predominantly subsistence oriented, of small size, keep few animals and provide only minimal inputs. Native breeds have evolved to meet these conditions and are generally well adapted to the natural environment, inadequate and unbalanced nutrition and disease stress. In general, there are two classes of goat, the one being the iconic Angora that produces mohair and the other the “common” or “hair” goat. The reduction in numbers is owing to a variety of reasons both internal and external to the country, but the Angora, which now amounts to only 2.5 percent of national goat numbers, has suffered relatively more than the hair types. This paper, based on detailed reviews of the literature and on the authors' own experiences, provides information on 17 breeds or recognized populations of Turkey's goat genetic resources and their conservation status. The government is now aware of the danger of the impoverishment or loss of this important aspect of biodiversity and has established programmes for conservation and preservation of several native breeds. The government, research institutions and producers should work together to ensure that the local gene pool is preserved and can thus continue to contribute to biodiversity and sustainable livestock production.

Turkey's 10.6 million head of cattle comprise a rich array of native breeds and types but these are being increasingly eroded by the often indiscriminate use of exotic genotypes. The structure of agriculture is such that most farms are predominantly subsistence oriented, of small size, keep few animals and provide only minimal inputs. Native breeds have evolved to meet these conditions and are generally well adapted to the natural environment, inadequate and unbalanced nutrition and disease stress. In the last 80 years, there has been much modification of the natural gene pool and many distinct breed types are in danger of or have already suffered extinction. This paper describes some of the major remaining cattle genetic resources and their conservation status. Government is now aware of the danger of the impoverishment or loss of this important aspect of biodiversity and has established programmes for conservation and preservation of several native breeds. Government, research institutions and producers should work together to ensure that the local gene pool is preserved and can thus continue to contribute to biodiversity and sustainable livestock production.