Divergent selection for fleece weight in French Angora rabbits : Non-genetic effects, genetic parameters and response to selection
| Autor: | H. de Rochambeau, R. G. Thebault, Seyed Abbas Rafat, Daniel Allain |
|---|---|
| Přispěvatelé: | Station d'Amélioration Génétique des Animaux (SAGA), Institut National de la Recherche Agronomique (INRA), Unité expérimentale du GEVES du Magneraud, ProdInra, Migration |
| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
[SDV.SA]Life Sciences [q-bio]/Agricultural sciences
biology.animal_breed Quantitative trait locus Best linear unbiased prediction Body weight Genetic correlation 03 medical and health sciences Animal science Genetic variability ComputingMilieux_MISCELLANEOUS 030304 developmental biology 2. Zero hunger [SDV.SA] Life Sciences [q-bio]/Agricultural sciences 0303 health sciences General Veterinary biology business.industry 0402 animal and dairy science 04 agricultural and veterinary sciences Heritability 040201 dairy & animal science Angora rabbit Biotechnology Wool Bristle Divergent selection Fleece weight Genetic responses Wool quality Animal Science and Zoology business |
| Zdroj: | Livestock Science Livestock Science, Elsevier, 2007, 106, pp.169-175 |
| ISSN: | 1871-1413 |
| Popis: | In order to explore genetic variability of wool production and other quantitative traits, an 8-cohort divergent selection experiment for total fleece weight (TFW) was carried out in French Angora rabbits. Studies were made on the wool production of 669 female rabbits born between 1994 and 2001 and having produced wool from the third to 12th harvests. The aim of the selection experiment was to obtain two divergent lines (low and high) on total fleece weight. The studied traits included total fleece weight, weight of the two qualities of wool (WAJ1 and WAW1), homogeneity (HOM), live body weight at ages of 4 (LW4), 8 (LW8), 12 (LW12), 16 (LW16), and 20 (LW20) weeks and then 9 weeks before each harvest (9LW). A preliminary analysis of non-genetic factors was done with the GLM procedure. The genetic parameters and genetic trends were analysed using a BLUP animal model. Heritability estimates for TFW, WAJ1, WAW1, HOM, LW4, LW8, LW12, LW16, LW20 and 9LW were 0.38, 0.30, 0.10, 0.06, 0.30, 0.09, 0.14, 0.32, 0.39 and 0.45, respectively. Genetic and phenotypic correlations between TFW and WAJ1 were high (0.98 ± 0.01 and 0.89 ± 0.01, respectively). There was a low genetic correlation between TFW and 9LW (0.26 ± 0.12). After eight cohorts of selection, the divergence between the lines was approximately three genetic standard deviations. Selection for total fleece weight had a generally beneficial effect on fleece quality. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect