Use Of Animal Genetic Resources Research Articles

Participatory investigation of goat farmers' breeding practices, trait preference, and selection criteria in Burkina Faso.

The community-based breeding program (CBBP) is an innovative approach recommended for genetic improvement and sustainable use of animal genetic resources in extensive farming systems. Successful implementation of this approach requires an understanding of the characteristics of production systems, breeding objectives, and farmers' trait preference. This study aimed to identify the selection criteria of goat farmers in rural areas of Burkina Faso and their potential implications in establishing CBBP. Following focus group discussions, a well-structured questionnaire was designed and administered to 372 randomly selected goat farmers in two different agro-ecological zones. A list of traits obtained during focus group discussions was provided to farmers individually, and they were asked to rank the ones they preferentially use to select breeding animals. Statistical tests were conducted to compare data between the two agro-ecological zones. The results showed that the average goat flock per household was higher (P < 0.05) in the Sudanian (15.68 ± 13.76), compared to the Sudano-Sahelian area (12.93 ± 13.3). Adult females were the dominant age-sex group in both areas. Reasons for culling, keeping breeding bucks, and castration practice were significantly different (P < 0.05) among agro-ecological zones. The most important common criterion for selection in the two zones was body size, coat color, and growth rate for the bucks and does, while fertility (0.06) parameters including twining ability (0.18), kidding frequency (0.11), and mothering ability (0.15) were furthermore considered for breeding does selection. These findings provide valuable insights for developing CBBPs tailored to goat production in the study areas.

Comparative fatty-acid profile and atherogenicity index of milk from free grazing Nguni, Boer and non-descript goats in South Africa

This study aimed to determine and compare the fatty acid composition and atherogenecity index of milk fat from Nguni, Boer and non-descript at two different sampling periods. The goats (n = 10 for each goat genotypes) were raised under an extensive system of husbandry. Milk samples were collected from each individual goat to determine fatty acids, as methyl esters, using gas chromatography. The result revealed significant differences (P < 0.05) in fatty acid profiles among the three goat genotypes for butyric, caproic, myristic, palmitic, stearic, vaccenic, linoleic, conjugated linoleic, α-linolenic, arachidic, eicosatrienoic and docosapentaenoic acids, among other milk fats. The time of milk sampling also had a significant effect (P < 0.05) on caproic, lauric, myristic, palmitic, palmitoleic, margaric, stearic, linoleic, arachidonic, docosapentaenoic and conjugated linoleic acids of milk fat. In addition, Nguni goats’ milk fat had a healthier fatty acid than those of Boer and non-descript goats, characterized by a lower content in saturated fatty acid (68.65, 73.77 and 71.73 (P < 0.05), respectively). Goat genotypes and milk sampling time had an influence on the fatty acid composition of goat milk. These findings support the fact that goat milk is an important source of health-promoting substances and support the sustainable use of animal genetic resources to improve goat milk fat quality, and hence deserve further investigation with local indigenous goat breeds.

Caracterización de ovinos Criollos argentinos utilizando índices zoométricos

The rational use of animal genetic resources, involves studying their zootechnical and productive characteristics by objective data. To fulfil this premise in the case of the Argentinean Creole sheep breed, much remains to be done. It is the first sheep breed in the country, is distributed in almost all provinces and occupies the third place of the current sheep stock. The objective of this work was to study the morphology of Creole sheep from four Argentine provinces using zoometric indexes, in order to recognize their ethnic characteristics and functional abilities. We worked with 203 adult sheep according to their dental chronometry: 59 belonging to Buenos Aires province (BA); 40 to Corrientes (CO); 60 to Santiago del Estero (SE) and 44 to Salta (SA). Eight zoometric indexes were calculated: four belonging to the ethnological type: Cephalic index (ICE); Thoracic index (ITO); Corporal index (ICO); Pelvic index (IPE) and four belonging to the functional type: Relative depth index (IPR); Pelvic transversal index (IPT); Pelvic longitudinal index (IPL); Short-sightedness relative index (ICR). Descriptive statistical analyzes were performed, ANOVA and Tukey test to detect differences between regions, linear correlations between indexes and Principal Component Analysis for ethnological and functional indexes separately. The results regarding to the ethnological indexes show that the four regions shared racial characteristics in common, although they present variability within population, the sheep from Salta are more homogeneous and then those from Buenos Aires which present more variability probably because of adaptation of animals to the different environments. The functional indexes indicate that in the four regions, sheep are suitable as meat-wool dual purpose animals. Salta’s sheep resulted to be the most uniform one and to have the best meat conformation.

Infrastructure for sustainable use of animal genetic resources in Southern and Eastern Africa

The Global Plan of Action (GPA) for Animal Genetic Resources (AnGR) adopted by FAO recognizes the role of AnGR for food security through improved productivity while maintaining genetic diversity. A critical issue for conservation and genetic improvement programmes is the availability of supportive infrastructure. The objective of the present study was to assess existing and needed infrastructure for sustainable use of AnGR in a sample of countries in Southern and Eastern Africa. Information was primarily obtained from semi-structured interviews with key personnel in animal breeding during country visits. Countries studied are at different stages of development. No complete breeding programmes are in place but some conservation programmes exist in most countries. Except for a few cases, livestock recording as basis for R&amp;D and breeding practice is lacking. The institutional setup to support animal breeding programmes is fragmented and needs to be better integrated. Shortage of skilled personnel is noted as the most serious constraint for development. Countries with least university training in animal breeding have least developed AnGR activities. However, since the GPA was agreed upon, many countries have re-casted their policies and make efforts to develop breeding policies. A change in mindsets aiming at closer collaboration among institutions, farmer involvement and capacity development and strengthening at all levels is suggested.

Genetic Selection and Conservation of Genetic Diversity*

For 100s of years, livestock producers have employed various types of selection to alter livestock populations. Current selection strategies are little different, except our technologies for selection have become more powerful. Genetic resources at the breed level have been in and out of favour over time. These resources are the raw materials used to manipulate populations, and therefore, they are critical to the past and future success of the livestock sector. With increasing ability to rapidly change genetic composition of livestock populations, the conservation of these genetic resources becomes more critical. Globally, awareness of the need to steward genetic resources has increased. A growing number of countries have embarked on large scale conservation efforts by using in situ, ex situ (gene banking), or both approaches. Gene banking efforts have substantially increased and data suggest that gene banks are successfully capturing genetic diversity for research or industry use. It is also noteworthy that both industry and the research community are utilizing gene bank holdings. As pressures grow to meet consumer demands and potential changes in production systems, the linkage between selection goals and genetic conservation will increase as a mechanism to facilitate continued livestock sector development.

Analysis of the Albanian national legislation in the light of the international legal framework relevant to the conservation and use of animal genetic resources

The Albanian legislation on conservation, management and sustainable economic use of Farm Animal genetic Resources is an intensive developing process. It aims to the FAnGR development in accordance with the requirements and obligation arising from the accession to various international convention (CDB, WTO etc...), and to align it with other legislations of EU member states. The legislative development is part of the work that Albania is implementing in the context of the Global Plan of Action for the Conservation of Animal Genetic Resources (FAO). Albanian current legislation treats only generally the entirety of the requests that should be fulfilled in order to enable the conservation and administration of the biological diversity of farm animals. It is necessary to develop it in order to solve the entirety of the problems regarding the need and necessity of the administration of this national asset, to meet, in an optimal way, the food security of current and future generations.

Rights to Animal Genetic Resources – Basic facts and debates

Different strands of thinking and various lines of arguments lie behind the enquiry into the creation of rights to animal genetic resources. These are fueled by three major developments regarding livestock genetic resources: the increasing volume in trade in animal products, the scientific progress in animal breeding with the advances in genetic engineering, and the so-called erosion of animal genetic resources. This paper discusses questions of conservation and the sustainable use of animal genetic resources for food and agriculture (AnGRFA) in context with international trade and property rights. It provides an overview of the ongoing processes, the current debates and involved institutions. The question asked from a trade angle is whether and how incentives (market incentives) can be created to address the failures that lead to market concentration and uniformity of breeds. The hypothesis is that the questions of ownership and allocation of the rights to the genetic information are key and a basis for creating incentives to provide for adequate investments in traditional breeds and foster fcreativity to adapt them to specific environmental conditions and consumer preferences.

Effects of breed on milk fatty acid profile in dairy ewes, with particular reference to &lt;i&gt;cis-9, trans-11&lt;/i&gt; conjugated linoleic acid

The objective of this study was to determine and compare the fatty acid profile of milk fat, with particular reference to cis-9, trans-11 conjugated linoleic acid (CLA), in two indigenous Romanian sheep breeds (Spanca and Turcana), irrespective of the effects of diet and season. The ewes (n = 25 for each breed) received the same feed (total mixed rations) and were maintained under identical conditions. Four samples were collected from each individual ewe to determine fatty acids (FA), as methyl esters, using gas chromatography. The fatty acid groups, namely saturated (SFA), monounsaturated (MUFA) and polyunsaturated (PUFA) acids were examined together with individual acids. Differences have been obtained between the two local breeds for the majority of FA. Fat in the milk of Turcana ewes has a healthier fatty acid profile than that of Spanca breed which has a lower concentration of SFA (60.9 vs. 73.3%) and higher concentrations of MUFA (31.0 vs. 21.0%) and PUFA (8.06 vs. 5.61%, respectively). Compared with the Spanca breed, fat in the milk of Turcana ewes had higher concentrations of trans -11 C18:1, C18:1 n9c, and cis-9 trans-11 CLA (2.67 vs. 1.01%, respectively). Δ 9 -desaturase activity is breed specific; vaccenic acid (trans-11 C18:1) desaturation and its conversion into cis-9, trans-11 CLA were more intense in the Turcana breed ewes. In conclusion, breed has a strong effect on the FA composition of ewe milk fat, and on cis-9, trans-11 CLA, in particular. The results obtained, support the sustainable use of animal genetic resources to improve the milk fat quality of ewes. Keywords : CLA, ewe’s milk, fatty acid profiles, Spanca, Turcana

There is room for selection in a small local pig breed when using optimum contribution selection: A simulation study1,2

Selection progress must be carefully balanced against the conservation of genetic variation in small populations of local breeds. Well-defined breeding programswith specified selection traits are rare in local pig breeds. Given the small population size,the focus is often on the management of genetic diversity. However, in local breeds, optimum contribution selection can be applied to control the rate of inbreeding and to avoid reduced performance in traits with high market value. The aim of this study was to assess the extent to which a breeding program aiming for improved product quality in a small local breed would be feasible. We used stochastic simulations to compare 25 scenarios. The scenarios differed insize of population, selection intensity of boars, type of selection (random selection, truncation selection based on BLUP breeding values, or optimum contribution selection based on BLUP breeding values), and heritability ofthe selection trait. It was assumed that the local breed is used in an extensive system for a high-meat-quality market.Thesimulations showed that in the smallest population (300 female reproducers), inbreeding increased by 0.8% when selection was performed at random. With optimum contribution selection, genetic progress can be achieved that is almost as great as that with truncation selection based on BLUP breeding values (0.2 to 0.5 vs. 0.3 to 0.5 genetic SD, P < 0.05), but at a considerably decreased rate of inbreeding (0.7 to 1.2 vs. 2.3 to 5.7%, P < 0.01). This confirmation of the potential utilization of OCS even in small populations is important in the context of sustainable management and the use of animal genetic resources.

Regional issues on animal genetic resources: trends, policies and networking in Europe

European countries are individually and in collaboration carrying out active work on animal genetic resources (AnGR). The region has a very good starting point for work on AnGR: The breed concept was developed in Europe; current European mainstream breeds are derived from local breeds and, in many species, have further formed the core of the international breeds; there has always been very active research in Europe on farm animal genetics and breeding, including sustainable utilization and management of variation.Since the 1970s and 1980s many European countries have been paying attention to local breeds and have saved many of them from total extinction. In quite a few countries, the conservation work has been supported by cryopreservation. In the Food and Agriculture Organization of the United Nations (FAO) coordinated process, Europe has actively contributed to assessing the State of the World's Animal Genetic Resources and will continue to implement the Global Plan of Action. There are now national action plans in most of the European countries.The European consumption of animal products has changed very little over recent decades. At the same time, production has become very intensive. Among other driving forces, the development of agriculture is steered by the EU policies. The last decade has seen new kind of thinking and measures directed towards an overall consideration of rural development. This has given room for the revitalization of many local breeds. The aim is to have schemes that promote the self-sustainability of local breeds. The EU also has a very ambitious research programme to support these aims while enhancing the overall sustainable production and management of biological resources.The European Regional Focal Point for Animal Genetic Resources (ERFP) is a common forum for the coordinators of European national programmes on AnGR. There are also many non-governmental organizations (NGOs) working in the animal sector. These NGOs and networks are most relevant to raising awareness about the importance of values of AnGR and in enhancing activities that contribute to conservation and sustainable use of AnGR.

Breed differences in sheep milk fatty acid profiles: Opportunities for sustainable use of animal genetic resources

Milk fatty acid profile of dairy sheep could be a clue for the sustainable use of local, endangered sheep breeds. We have determined milk quality parameters and fatty acid profiles in milk of three Italian breeds, Altamurana, Gentile di Puglia and Sarda. We found significant differences ( P < 0.05) between breeds in C4:0; C6:0; C12:0; C14:0; C16:0; C18:0. The Altamurana breed showed a higher content of caproic (C6:0), lauric (C12:0), myristic (C14:0) and palmitic (C16:0) than the Sarda. Compared to Gentile di Puglia, Altamurana milk had a higher content of butyric (C4:0), myristic (C14:0) and palmitic (C16:0). Butyric (C4:0) and stearic (C18:0) were highest in the Sarda breed. The Gentile di Puglia breed showed the lowest content of saturated fatty acids. No differences between breeds were evident for CLA and poly-unsaturated FAs (PUFAs), while MUFAs were lowest in the Altamurana. We found that milk yield and fat content affected significantly milk fatty acid profiles ( P < 0.05); when milk yield increased, myristic fatty acid (FA) and total saturated FA were decreased, while PUFA were increased. Short- and medium-chain FA and CLA were negatively affected by fat percent, while stearic acid was positively affected. The differences between breeds in milk fatty acid profiles, according to the reviewed literature on cheese characteristics, are likely to affect cheese quality and could be an indicator of typicity to launch specific types of cheese, to sustain the local, endangered Altamurana and Gentile di Puglia breeds.

Inventory, characterization and monitoring

SummaryInventory of species and breeds, their population sizes, geographic distribution and possibly their genetic diversity is generally undertaken as a first step in any national programme for the management of animal genetic resources for food and agriculture. The primary purpose of such an assessment is to document the current state of knowledge in terms of a population's ability to survive, reproduce, produce and provide services to farmers. Starting an inventory requires some knowledge of the inventory items and their characteristic attributes. Inventory and characterization are, therefore, complementary processes, in which the characterization step provides the baseline information as well as the criteria that will be used to establish and update the inventory. Characterization provides data on present and potential future uses of the animal genetic resources under consideration, and establishes their current state as distinct breed populations and their risk status. As use and management of animal genetic resources are dynamic processes, monitoring the status of a population has to be done on a regular basis. Thus, risk status indicators for use during the monitoring process need to be defined following the inventory and characterization steps.This paper discusses methods and criteria currently available, from research and past experience, for inventory, characterization and monitoring of animal genetic resources, with the view to assist in the development of a more comprehensive framework. Particular consideration is given to emerging tools and technologies. The scope of the review includes all livestock species and their wild ancestors and wild related species. Examples focus on cattle, sheep, goats, pigs and chickens.

Sustainable use and genetic improvement

SummarySustainable use of animal genetic resources for agriculture and food production is proposed as the best strategy for maintaining their diversity. Achievement of sustainable use would continue to support livelihoods and minimize the long-term risk for survival of animal populations. The concept of sustainable use has economic, environmental and socio-cultural dimensions. Sustainable use of animal genetic resources also contributes to food security, rural development, increasing employment opportunities and improving standards of living of keepers of breeds. Supporting the rearing of breeds through better infrastructure, services, animal health care, marketing opportunities and other interventions would make a significant contribution to the sustainable use of animal genetic resources.Sustainable use envisages the use and improvement of breeds that possess high levels of adaptive fitness to the prevailing environment. It also encompasses the deployment of sound genetic principles for sustainable development of the breeds and the sustainable intensification of the production systems themselves. Sustainable use and genetic improvement rely on access to a wide pool of genetic resources.Genetic improvement programmes need to be considered in terms of national agriculture and livestock development objectives, suitability to local conditions and livelihood security as well as environmental sustainability. Genetic improvement can involve choice of appropriate breeds, choice of a suitable pure breeding or crossbreeding system and application of within-breed genetic improvement. The choice of appropriate breeds and crossbreeding systems in developed countries has been a major contributor to the large increases in productivity, and has benefited greatly from the fact that developed country animal genetic resources are well characterized and relatively freely exchanged. Where proper steps have been followed by careful assessment of demand, execution, delivery, impact and cost-benefit analyses, successful within-breed improvement has been realized within indigenous populations in developing countries. Breeding objectives and programmes for subsistence oriented and pastoralist systems are likely to be entirely different from conventional programmes. Crossbreeding has been most successful where it is followed by a rigorous selection programme involving livestock owners' participation and substantial public sector investment in the form of technical support. In any genetic improvement programme, inbreeding needs to be monitored and controlled.Within-breed genetic improvement is normal practice in the developed world, and has become a highly technical enterprise, involving a range of reproduction, recording, computing and genomic technologies. Emerging genomic technologies promise the ability to identify better, use and improve developing world animal genetic resources in the foreseeable future. Useful systems can, however, be established without the need for application of advanced technology or processes.

Economic Analysis of Animal Genetic Resources and the Use of Rural Appraisal Methods: Lessons from Southeast Mexico

Livestock diversity provides genetic alternatives that facilitate sustainable agricultural development. Despite this, animal genetic resources (AnGR) are being depleted at alarming rates. Subsidises available to production systems based on imported breeds are of several orders of magnitude greater than the costs of local breed conservation. Economic arguments for the conservation and sustainable use of threatened AnGR can be an effective means of establishing support for the development of appropriate enabling environments. Despite the importance of the economics of AnGR conservation, the subject has received limited attention. Reasons include: methodological difficulties inherent in valuing genetic resources; limited knowledge about appropriate analytical techniques; and lack of data regarding local breeds. As recent advances in economic valuation have eased methodological/analytical constraints, the issue of data availability has become critical. Data related to livestock keepers' preferences for different genetic resource attributes and the value placed on these across species, breeds and production systems are needed. Based on a study of a local pig breed in Mexico, this paper shows how the use of rural appraisal methods, in conjunction with recently developed analytical techniques, are capable of providing the data required for understanding the type and costs of interventions necessary to promote the conservation and sustainable use of AnGR.

Conservation of farm animal biodiversity: history and prospects

SummaryThe conservation and sustainable use of animal genetic resources (AGR) is now recognized as a legitimate activity of public concern in which inter-governmental, governmental, non-governmental and private sectors are involved. Livestock breeds became threatened on a large scale only in the second half of the 20th century. They are now recognized as a significant human heritage resulting from domestication whose loss would deplete the quality of human life. Conservation as a conscious and organized activity is therefore a new item on the public agenda. This paper traces the origin of livestock conservation from the Vision in the 1950s and 1960s through the awakening of the environmental movement with the creation of UNEP in 1972, followed by the development of a Joint Conservation Infrastructure and Programme for animal genetic resources in the 1980s by FAO and UNEP.The paper describes the context, participants, constraints, opposition and activities of building the AGR Conservation Infrastructure and Programme. Although the concept of conservation was opposed by some and there were both financial and political difficulties, an effective institutional infrastructure for conservation was built by FAO by 1990 using UNEP funds. In 1992, the advent of the Convention on BioDiversity offered substantial funding for project activities for the first time through the Global Environmental Facility (GEF). At that point it was desirable to move activities from central planning to the design, funding and operation of local or national conservation projects. “Top-down” institutional control should have been replaced by “Bottom-up” conservation activities. Regrettably this did not happen during the 1990s and, as shown by successive editions of the World Watch List, the number of endangered livestock breeds has continued to increase. Now that the conservation vision is accepted and the institutional infrastructures are in place it is time for a new dynamic by creating and funding specific conservation projects which harness the local human resources of knowledge and enthusiasm.