Appropriate breeds and breeding schemes for sheep and goats in the tropics
The purpose of this chapter is two-fold. First, the information available on breeds of sheep and goats that are resistant or resilient to helminthiasis (mainly the GI nematodes) infections are reviewed. This is important information for inclusion of appropriate breeds in integrated endoparasite cont...
| Main Authors: | , |
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| Format: | Book Chapter |
| Language: | Inglés |
| Published: |
Australian Centre for International Agricultural Research
2004
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/2920 |
| _version_ | 1855525110216130560 |
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| author | Baker, R.L. Gray, G.D. |
| author_browse | Baker, R.L. Gray, G.D. |
| author_facet | Baker, R.L. Gray, G.D. |
| author_sort | Baker, R.L. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | The purpose of this chapter is two-fold. First, the information available on breeds of sheep and goats that are resistant or resilient to helminthiasis (mainly the GI nematodes) infections are reviewed. This is important information for inclusion of appropriate breeds in integrated endoparasite control programs, which may include resistant breeds or genotypes, improved nutrition, strategic drenching, improved management (e.g. housing animals in the wet season) and rotational grazing (Barger 1996, Waller 1997, Alo et al., this volume). However, most of the breeds of sheep and goats that have been identified as resistant or resilient are tropical indigenous ones. Many people, including smallholder farmers in the tropics, often perceive these relatively small indigenous breeds to be unimproved with low genetic potential for increased production. Almost invariably, larger breeds with higher growth rates are assumed to be more productive and often the larger breeds are exotic breeds that are poorly adapted to tropical conditions. Therefore, the second part of this paper discusses how practical breeding programs in the tropics might be developed taking into account both adaptability (disease resistance is just one component of adaptability) and productivity. Particular emphasis is placed on the need to better understand different farming systems in the tropics, their production objectives and the different constraints to increasing productivity before embarking on genetic improvement programs. |
| format | Book Chapter |
| id | CGSpace2920 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2004 |
| publishDateRange | 2004 |
| publishDateSort | 2004 |
| publisher | Australian Centre for International Agricultural Research |
| publisherStr | Australian Centre for International Agricultural Research |
| record_format | dspace |
| spelling | CGSpace29202023-12-21T14:51:33Z Appropriate breeds and breeding schemes for sheep and goats in the tropics Baker, R.L. Gray, G.D. goats sheep tropics breeding methods pest resistance genetic resistance parasites breeds (animals) productivity crossbreds The purpose of this chapter is two-fold. First, the information available on breeds of sheep and goats that are resistant or resilient to helminthiasis (mainly the GI nematodes) infections are reviewed. This is important information for inclusion of appropriate breeds in integrated endoparasite control programs, which may include resistant breeds or genotypes, improved nutrition, strategic drenching, improved management (e.g. housing animals in the wet season) and rotational grazing (Barger 1996, Waller 1997, Alo et al., this volume). However, most of the breeds of sheep and goats that have been identified as resistant or resilient are tropical indigenous ones. Many people, including smallholder farmers in the tropics, often perceive these relatively small indigenous breeds to be unimproved with low genetic potential for increased production. Almost invariably, larger breeds with higher growth rates are assumed to be more productive and often the larger breeds are exotic breeds that are poorly adapted to tropical conditions. Therefore, the second part of this paper discusses how practical breeding programs in the tropics might be developed taking into account both adaptability (disease resistance is just one component of adaptability) and productivity. Particular emphasis is placed on the need to better understand different farming systems in the tropics, their production objectives and the different constraints to increasing productivity before embarking on genetic improvement programs. 2004 2010-12-10T05:31:58Z 2010-12-10T05:31:58Z Book Chapter https://hdl.handle.net/10568/2920 en Open Access Australian Centre for International Agricultural Research |
| spellingShingle | goats sheep tropics breeding methods pest resistance genetic resistance parasites breeds (animals) productivity crossbreds Baker, R.L. Gray, G.D. Appropriate breeds and breeding schemes for sheep and goats in the tropics |
| title | Appropriate breeds and breeding schemes for sheep and goats in the tropics |
| title_full | Appropriate breeds and breeding schemes for sheep and goats in the tropics |
| title_fullStr | Appropriate breeds and breeding schemes for sheep and goats in the tropics |
| title_full_unstemmed | Appropriate breeds and breeding schemes for sheep and goats in the tropics |
| title_short | Appropriate breeds and breeding schemes for sheep and goats in the tropics |
| title_sort | appropriate breeds and breeding schemes for sheep and goats in the tropics |
| topic | goats sheep tropics breeding methods pest resistance genetic resistance parasites breeds (animals) productivity crossbreds |
| url | https://hdl.handle.net/10568/2920 |
| work_keys_str_mv | AT bakerrl appropriatebreedsandbreedingschemesforsheepandgoatsinthetropics AT graygd appropriatebreedsandbreedingschemesforsheepandgoatsinthetropics |