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https://hdl.handle.net/1959.11/4607
Title: | Genetic parameters for reproduction in ostriches | Contributor(s): | Cloete, S W P (author); Bunter, Kim Louise (author); Brand, Z (author) | Publication Date: | 2005 | Handle Link: | https://hdl.handle.net/1959.11/4607 | Abstract: | Between 1212 and 1487 hen-year reproduction records of a pair-bred ostrich flock were recorded from 1991 to 2003. These data were used to estimate (co)variances between reproduction traits. Egg (EP) and chick production (CP) were highly variable and moderately heritable (h² > 0.25). Hatched eggs as a percentage of EP (HATCH%) was lowly heritable (h² = 0.05), but depended strongly on the female permanent environment (c² = 0.24) and service sire (ss² = 0.19) effects. Average chick weight (ACW) was highly heritable (h² = 0.71) with a small contribution from the service sire (ss² = 0.08). Genetic correlations (ra) between reproductive traits were generally favourable, and effectively unity between EP and CP. CP was unrelated genetically to ACW (ra: -0.01). Correlations between service sire effects (rss) were low between HATCH% and EP but high with CP (rss: -0.01 vs 0.81). | Publication Type: | Conference Publication | Conference Details: | AAABG 2005: 16th Conference of the Association for the Advancement of Animal Breeding and Genetics, Noosa Lakes, Australia, 25th - 28th September, 2005 | Source of Publication: | Proceedings of the Association for the Advancement of Animal Breeding and Genetics, v.16, p. 132-135 | Place of Publication: | Collingwood, Australia | ISSN: | 1328-3227 | Fields of Research (FoR) 2008: | 070201 Animal Breeding | Socio-Economic Objective (SEO) 2008: | 830305 Game Livestock (e.g. Kangaroos, Wallabies, Camels, Buffaloes, Possums) | Peer Reviewed: | Yes | HERDC Category Description: | E1 Refereed Scholarly Conference Publication | Publisher/associated links: | http://www.aaabg.org/livestocklibrary/2005/132cloete.pdf http://trove.nla.gov.au/work/13321110 |
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Appears in Collections: | Animal Genetics and Breeding Unit (AGBU) Conference Publication |
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