Differences among four meat goat breeds for doe fitness indicator traits in the southeastern United States1
| Autor: | Richard Browning, L. Wang, M. L. Leite-Browning, A. Nguluma |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Veterinary medicine media_common.quotation_subject biology.animal_breed Biology Pasture 03 medical and health sciences Animal science Genetic resources Myotonic goat Genetics Weaning Feces media_common geography geography.geographical_feature_category 0402 animal and dairy science 04 agricultural and veterinary sciences General Medicine 040201 dairy & animal science Breed 030104 developmental biology Herd Animal Science and Zoology Reproduction Food Science |
| Zdroj: | Journal of Animal Science. 95:1481-1488 |
| ISSN: | 1525-3163 0021-8812 |
| DOI: | 10.2527/jas.2016.1283 |
| Popis: | Sustainable meat goat production begins with the identification and use of maternal breeds that demonstrate relatively enhanced levels of fitness under less-than-optimal conditions. The Myotonic goat is a heritage breed that is lacking in comparative assessment for female fitness. In this study, Boer ( = 73), Kiko ( = 115), Myotonic ( = 80), and Spanish ( = 114) meat goat does were compared for traits associated with health and reproduction. The herd was semi-intensively managed on humid subtropical pasture for 6 yr. The study included 838 doe-year matings and over 2,000 records for BW, fecal egg count (FEC), and packed cell volume (PCV). Body weights of Boer and Kiko does were heavier ( < 0.05) than for Spanish does, which, in turn, were heavier ( < 0.05) than for Myotonic does. In production does, FEC were lower ( < 0.05) for Myotonic does than for Boer does, whereas Kiko and Spanish does had intermediate FEC that differed ( < 0.05) from Myotonic and Boer does. Kiko, Myotonic, and Spanish does had greater ( < 0.05) PCV than Boer does. Doe age and physiological status also affected ( < 0.05) BW, FEC, and PCV. Annual kidding rates, weaning rates, doe retention rates, and kid crop weaned were greater ( < 0.05) for Kiko and Spanish does than for Boer does, whereas Myotonic does were intermediate and differed ( < 0.05) from the other 3 breeds. The results suggest that Kiko and Spanish does should be preferred over Boer and Myotonic does for sustainable meat goat doe performance under limited-input management conditions. Myotonic does maintained the lowest FEC among all doe breeds and warrant further evaluation as a genetic resource for controlling gastrointestinal parasitism. |
| Databáze: | OpenAIRE |
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