Resumen

ANGELES-HERNANDEZ, Juan Carlos et al. Effect of genetic group on characteristics of the ovine lactation curve. Ecosistemas y recur. agropecuarios [online]. 2018, vol.5, n.14, pp.327-333. ISSN 2007-901X.  https://doi.org/10.19136/era.a5nl4.1425.

The objective of the study was to analyze the milk production and characteristics of the lactation curve of ovine genetic groups. We analyzed 863 weekly production records of 70 lactations of six genetic groups: East Friesian (EF), Criollo (Cr), EF ½ Cr ½ (EF50Cr50), EF 3/4 Cr ¼ (EF75Cr25), Suffolk ½ Cr ½ (Suffolk50Cr50), and Corriedale (C). Wood's function (WD) was used to estimate the total observed milk production (TMP obs ) and estimated at 180 d (TMP180), lactation peak (LP), time to lactation peak (tLP) and persistence (Per). The genetic group had a significant influence (p < 0.05) on tTMP obs , TMP180, LP and parameter b of the WD model, with higher values in the EF50Cr50 sheep. The differences in productive performance with the genetic group may be associated with the adaptability of EF sheep to local climatic conditions.

Palabras llave : East Friesian; Wood model; dairy sheep; persistence; lactation peak.

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