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Componentes de varianza y repetibilidad de características productivas y textiles de la fibra en alpacas (Vicugna pacos) Huacaya criadas a nivel comunal

2016; Asociación Latinoamericana de Producción Animal; Volume: 24; Issue: 4 Linguagem: Espanhol

2075-8359

P Edgar Carlos Quispe, Rolando Quispe Ramos,

Multidisciplinary Research Papers Compilation

espanolA fin de estimar componentes de varianza fenotipica, correlacion fenotipica y repetibilidad de media de diametro de fibra (MDF), coeficiente de variacion de MDF (CVMDF), peso de vellon (PVe), indice de curvatura (IC) y longitud de mecha (LM), se realizo un ensayo con 41 alpacas (22 machos y 19 hembras) en los anos 2009 y 2010, en la comunidad Santo Domingo de Cachi, Junin, Peru. Los animales que nacieron en el 2008, se esquilaron anualmente, midiendo los caracteres en estudio en cada una de las muestras de fibra, tomadas del costillar medio. Los resultados indican que las alpacas de la zona en estudio producen vellones con buen peso, de fibras que exhiben finura, de bajo CVMDF y que la LM al ano esta acorde a los requerimientos textiles. La edad tuvo efecto solo sobre la MDF, IC y LM; y el sexo solo sobre el PVe y LM. Las varianzas genetica + ambiente permanente (VG + VAP) de la MDF e IC fueron mayores a las varianzas del ambiente temporal (VAT), ocurriendo lo contrario para las varianzas del CVMDF, PVe y LM. Las correlaciones fenotipicas entre las cinco caracteristicas estudiadas resultaron alrededor de 0.28, observandose correlaciones positivas en unas y negativas en otras, mientras que en MDF con CVMDF y CVMDF con IC no hubo relacion significativa. La correlacion entre MDF e IC fue la mas alta y negativa. La repetibilidad para MDF fue la mas alta (0.71 ± 0.08), y la mas baja la de LM (0.29 ± 0.15). portuguesA trial was conducted with 41 alpacas (22 males and 19 females) during the years 2009 and 2010 in the rural community of Santo Doming de Cachi in the Junin region of Peru, to estimate components of phenotypic variance, phenotypic correlations and repeatability of the average fiber diameter (AFD), coefficient of variation of same (CVAFD), dirty fleece weight (DFW), fiber curvature (FC), and staple length (SL). Animals born in 2008 were sheared annually, along with measurement of each of the characters under study. Samples of fiber were taken at midside of each animal. The results show that alpacas of the study area produce fleece of adequate weight and fibers of the desired fineness, with low CVAFD and that the yearly increase in staple length meets the requirements of the textile industry. Animal age had an effect on AFD, FC and SL, but not on CVAFD nor DFW, while sex affected only DFW and SL. The genetic + permanent environmental variances (VG + VAP) of ADF and FC were greater than the temporary environmental variances (VAT), while the opposite was true for CVAFD, DFW, and SL variances. The phenotypic correlations among the five characters studied were mostly on the order of 0.28, some being negative and others positive, while the two correlations of AFD with CVAFD and CVAFD with FC were not significant. The negative correlation of AFD with FC was the one of highest magnitude. As for repeatability estimates, the highest was that of AFD (0.71 ± 0. 08), and the lowest that of SL (0.29 ± 0.15).