Índices Genéticos Estimados Para Peso Corporal en Llamas.

Modelling of growth curves and estimation of genetic parameters for growth curve parameters in Peruvian young llamas (Lama glama)

“…A higher value of A for females may be reasonably expected, due to the hormonal and physiological differences that stimulate the early onset of sexual activity, resulting in the increased body development of females than males (Otuma and Osakwe, 2008). Significant effects of sex on mature weight of llama have been reported in previous studies (Wurzinger et al, 2005;Zea, 2006;García and Leyva, 2007; Within a column (and within each factor), values with different superscript letters differ significantly at p < 0.05. Cortez and Copa, 2008).…”

“…However, Wurzinger et al (2005), evaluating the growth and body measurements traits in Bolivian llamas, reported moderate values of heritability (0.36) for body weight. García and Leyva (2007) working with both llama strains, obtained estimates for live weight from birth to second shearing, ranging from 0.31 to 0.68 and 0.28 to 0.59 for K'ara and Ch'accu strains, respectively. The disagreement between our results and those of other authors may be explained by differences in methods of estimation, sample size used, biological or genetic differences between llama strains, etc.…”