Genetic and environmental effects on semen traits in Lacaune and Manech tête rousse AI rams (Open Access publication)

Genetics Selection Evolution

Loys Bodin³  Christèle Robert-Granié³  Eduardo Manfredi³  Gilles Lagriffoul²  Xavier Druart¹  Ingrid David³ 

[1] Physiologie de la reproduction et des comportements, INRA – CNRS UMR1291, 37380 Nouzilly, France;Institut de l'Éevage, ANIO, BP 42118, 31320 Castanet-Tolosan Cedex, France;Station d'amélioration génétique des animaux, INRA, UR631, BP 52627, 31320 Castanet-Tolosan Cedex, France

关键词: environmental factor;    semen;    ram;   

Others  :  1093987
DOI  :  10.1186/1297-9686-39-4-405

 received in 2006-05-04, accepted in 2007-02-22,  发布年份 2007

【 摘 要 】

Data from 51 107 and 11 839 ejaculates collected on rams of the "Lacaune" and "Manech tête rousse" breeds, respectively, were analysed to determine environmental and genetic factors affecting semen production traits (ejaculate volume, semen concentration, number of spermatozoa and motility) in young (≤1 year) and adult (≥2 years) rams. Fixed effects and variance components were estimated using multiple trait animal models within each breed. For all traits, the main environmental effects identified were year, season, number of ejaculations, daily variation, interval from previous to current collection and age. Heritability estimates were moderate for volume, concentration and number of spermatozoa (0.12 to 0.33) and lower for motility (0.02 to 0.14). Genetic correlations between ages differed from 1 for all traits (0.14 to 0.90), indicating that semen characteristics corresponded to different traits in young and adult rams. Genetic and phenotypic correlations among traits within age category were globally similar for the different breeds and categories of animals.

【 授权许可】

   
2007 INRA, EDP Sciences