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).
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the Association for the Advancement of Animal Breeding and Genetics |
| Editors | AAABG: Association for the Advancement of Animal Breeding, Genetics |
| Place of Publication | Collingwood, Australia |
| Pages | 132-135 |
| Volume | 16 |
| Publication status | Published - 2005 |
| Event | AAABG 2005: 16th Conference of the Association for the Advancement of Animal Breeding and Genetics - Noosa Lakes, Australia Duration: 25 Sept 2005 → 28 Sept 2005 |
Conference
| Conference | AAABG 2005: 16th Conference of the Association for the Advancement of Animal Breeding and Genetics |
|---|---|
| City | Noosa Lakes, Australia |
| Period | 25/09/05 → 28/09/05 |
Keywords
- Animal Breeding
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