Características productivas y textiles de la fibra de alpacas de raza huacaya

Quispe, Edgar; Gutiérrez, Adolfo Poma; Unanua, Antonio Purroy

doi:10.5209/rev_rccv.2013.v7.n1.41413

Cited by 18 publications

(22 citation statements)

References 36 publications

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“…It was a similar value to that reported by Wang et al (2003) in Australian alpacas (32.28%), higher than the 24.4% value reported in another Australian alpaca population (Aylan-Parker and McGregor, 2002). Nonetheless all these values are much lower than the 66.49% mean reported by Quispe et al (2013) in non selected Peruvian alpacas. Table 1 shows also an enormous PM variability, from 0% to 100% in both genetic types, variability not present in other species.…”

Section: Discussionsupporting

confidence: 82%

Genetic parameters for medullated fiber and its relationship with other productive traits in alpacas

Cruz¹,

Morante²,

Gutiérrez

et al. 2019

Animal

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The alpaca fiber diameter (FD) varies from 18 to 36 μm, being the finer fiber categories highly appreciated. However, the alpaca fiber presents some limitations in the textile industry due to the high incidence of fiber medullation and diameter variability, both reduces the comfort feeling of the garments. Decreasing or even removing medullation could be a possible selection objective in alpaca breeding programs for increasing economic value of the alpaca fiber. Therefore, the present work aimed to estimate genetic parameters regarding medullation traits, as well as the genetic correlations with other economical important traits, to be able to select the appropriate criteria to reduce or remove medullation on alpaca fiber and help to reduce the prickle factor in the garments. The data was collected from 2000 to 2017 and belonged to the Pacomarca experimental farm. There were 3698 medullation records corresponding to 1869 Huacaya and 414 Suri genetic types. The fiber samples were taken from the mid side, and were analyzed in an OFDA 100® device. The traits analyzed were percentage of medullation (PM), medullated fiber diameter (MFD), FD, standard deviation of FD, greasy fleece weight as fiber traits; density, crimp in Huacaya and lock structure in Suri, head conformation, leg coverage as morphological traits; weaning weight and age at first calving as secondary and functional traits. Genetic parameters were estimated via a multitrait restricted maximum likelihood. The heritabilities for PM and MFD were 0.225 and 0.237 in Huacaya genetic type and 0.664 and 0.237 in Suri genetic type, respectively; heritabilities for other traits were moderate for productive and morphological traits, and low to moderate for secondary and functional traits. The genetic correlations PM–FD and MFD–FD were high and favorable in both genetic types, between 0.531 and 0.975; the genetic correlation PM–MFD was 0.121 in Huacaya and 0.427 in Suri. The rest of genetic correlations with other traits were in general moderate and favorable. The repeatabilities were 0.556 and 0.668 for PM, and 0.322 and 0.293 for MFD in Huacaya and Suri genetic types, respectively. As a conclusion, PM was identified to be a good selection criterion, probably combined in an index with FD to reduce prickling factor.

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Section: Discussionsupporting

confidence: 82%

Genetic parameters for medullated fiber and its relationship with other productive traits in alpacas

Cruz¹,

Morante²,

Gutiérrez

et al. 2019

Animal

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“…Moreover, the minimum (17.82 µm) and maximum (37.71 µm) values were slightly different than values reported by Laime Huarcaya et al [45] for Peruvian llamas (16.18 µm and 41.42µm) and 16.4 µm and 34.2 µm reported by Canaza-Cayo et al [13] in alpaca fibres. Several reports have established that average fineness in Argentinian llama fibres is about 23 µm [6,31,47,51]. Similar values were reported in Bolivia and Perú [45].…”

Section: Reference Analysissupporting

confidence: 68%

Development of Calibration Models to Predict Mean Fibre Diameter in Llama (Lama glama) Fleeces with Near Infrared Spectroscopy

Amorena

Álvarez

Fernández-Ahumada

2021

Animals

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Llama fibre has the potential to become the most valuable textile resource in the Puna region of Argentina. In this study near infrared reflectance spectroscopy was evaluated to predict the mean fibre diameter in llama fleeces. Analyses between sets of carded and non-carded samples in combination with spectral preprocessing techniques were carried out and a total of 169 spectral signatures of llama samples in Vis and NIR ranges (400–2500 nm) were obtained. Spectral preprocessing consisted in wavelength selection (Vis–NIR, NIR and discrete ranges) and multiplicative and derivative pretreatments; spectra without pretreatments were also included, while modified partial least squares (M-PLS) regression was used to develop prediction models. Predictability was evaluated through R2: standard cross validation error (SECV), external validation error (SEV) and residual predictive value (RPD). A total of 54 calibration models were developed in which the best model (R2 = 0.67; SECV = 1.965; SEV = 2.235 and RPD = 1.91) was obtained in the Vis–NIR range applying the first derivative pretreatment. ANOVA analysis showed differences between carded and non-carded sets and the models obtained could be used in screening programs and contribute to valorisation of llama fibre and sustainable development of textile industry in the Puna territory of Catamarca. The data presented in this paper are a contribution to enhance the scarce information on this subject.

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“…El diámetro de fibra (µm) se considera como la finura de la fibra y representa una de las características más valiosas para su apreciación cualitativa, siendo determinante para su clasificación (Pinazo, 2000;Quispe et al, 2013); sin embargo, su evaluación resulta un problema a causa de su costo y acceso a los métodos existentes (Quispe et al, 2018), principalmente para los pequeños productores. La fibra de alpaca, en el corte transversal, presenta tres capas más o menos concéntricas: cutícula, corteza y médula (Bustinza, 2001).…”

Section: Introductionunclassified

Variación en el diámetro de fibra por efecto de la medulación en vellones finos de alpacas Huacaya de tres grupos etarios

Guillén

Leyva

2020

Rev. investig. vet. Perú

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El objetivo del estudio fue evaluar el efecto de la medulación y la edad en la variación del diámetro de las fibras de vellón fino. Se evaluaron 24 703 fibras obtenidas del flanco de 186 alpacas Huacaya hembra, color blanco, de 1.5-2 años (dos dientes), 3-4 años (cuatro dientes) y más de 4 años (boca llena). Se categorizó las fibras según su diámetro como extrafinas, finas, media finas y gruesas, y según la medulación como médula completa, partida y sin médula. El diámetro promedio de las fibras dentro de cada categoría y tipo de medulación fue similar entre los grupos etarios. El efecto simple entre las categorías de las fibras y los tipos de medulación resultó en una dependencia significativa (p<0.01), donde el diámetro de la fibra incrementa por la presencia de médula (partida y completa) y disminuye en su ausencia. Se concluye que la medulación causa variación en el diámetro de las fibras, y la presencia de fibras con médulas partidas es el paso intermedio en la disminución del diámetro y frecuencia de fibras meduladas. Por otro lado, la ausencia del efecto edad asociado al efecto medioambiental del número de esquilas en las alpacas de mayor edad sugiere la expresión de un potencial genético que podría ser usado en programas de mejora genética.

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Características productivas y textiles de la fibra de alpacas de raza huacaya

Cited by 18 publications

References 36 publications

Genetic parameters for medullated fiber and its relationship with other productive traits in alpacas

Genetic parameters for medullated fiber and its relationship with other productive traits in alpacas

Development of Calibration Models to Predict Mean Fibre Diameter in Llama (Lama glama) Fleeces with Near Infrared Spectroscopy

Variación en el diámetro de fibra por efecto de la medulación en vellones finos de alpacas Huacaya de tres grupos etarios

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