Polimorfismos de nucleótido simple (PNSs) del gen MC1R en alpacas negras y marrones

Pinares, Rubén; Cruz, Alan; Daverio, María Silvana; Gutiérrez, Juan Pablo; León, F. A. Ponce de; Wurzinger, María; Rocco, F. Di; Gutiérrez, Gustavo

doi:10.15381/rpb.v28i1.19742

Cited by 3 publications

(4 citation statements)

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“…The same situation was also determined in llamas, guanacos, and vicuñas analyzed where all the animals were of the CC genotype. These results differ from those found by the authors in [ 21 , 34 ] who did not see white alpacas with the TT genotype and only found heterozygous white alpacas. The authors in [ 20 , 29 ] mentioned genotypes similar to those reported in the present study.…”

Section: Discussioncontrasting

confidence: 99%

“…Mutations affecting promoter regions and specific transcription factors have increased melanin synthesis [ 38 ]; 3′ untranslated regions (3′ UTRs) contain a critical class of noncoding variants that might impact posttranscriptional and translational processes [ 39 ]. Although one of these polymorphisms (3′+5T > C) was reported in [ 19 , 34 ], it was not significant compared to the results of the present study.…”

Section: Discussioncontrasting

confidence: 96%

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MC1R Gene Variants and Their Relationship with Coat Color in South American Camelids

Melo Rojas,

Bravo Matheus,

Zapata Coacalla

et al. 2023

The Scientific World Journal

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In domestic camelids, fleece color is an essential characteristic because it defines the direction of production. Variants were determined in the MC1R gene that showed a relationship with coat color in alpacas and llamas at the level of the coding region. This report sequenced the MC1R gene from 290 alpacas (142 white, 84 black, 50 brown, and 14 light fawn), five brown llamas, nine vicuñas, and three guanacos to analyze the association between coat color and the MC1R gene among South American camelids. A total of nineteen polymorphisms were identified. Seven polymorphisms were significant; three of them were of nonsynonymous type (c.82A > G, c.376G > A, and c.901C > T), two were of synonymous type (c.126 T > C and c.933G > A), one was in the promoter region (−42C > G), and one was in the 3′ UTR (+5T > C). More polymorphisms were found in domestic camelids than in wild camelids. Besides polymorphism, the association of polymorphisms might cause white and dark pigmentation in the fleece of South American camelids. In addition, the MC1R protein would answer the pigmentation in alpacas.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussioncontrasting

confidence: 96%

MC1R Gene Variants and Their Relationship with Coat Color in South American Camelids

Melo Rojas,

Bravo Matheus,

Zapata Coacalla

et al. 2023

The Scientific World Journal

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“…Las coordenadas del espacio CIE L*a*b* definen los parámetros colorimétricos como la luminosidad, intensidad y tonalidad de la fibra (Pinares et al, 2021;Cruz et al, 2021). El parámetro K/S es un indicador de la intensidad del color.…”

Section: Introductionunclassified

Comparaciones de la espectroscopía infrarroja por transformada de Fourier (FTIR), parámetros colorimétricos y porcentaje de medulación en fibra de vicuña

Pinares,

Machaca,

Lozano

et al. 2023

Rev. investig. vet. Perú

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El objetivo de esta investigación fue comparar fibra de vicuña mediante la espectroscopía infrarrojos por transformada de Fourier (FTIR), determinar los parámetros colorimétricos y los porcentajes de medulación en fibra de vicuña provenientes de Puno y Apurímac (Perú). Mediante colorimetría se caracterizó la lumiminosidad (L*), intensidad o pureza de color (C*) y tonalidad (H*). Estos parámetros demuestran una variabilidad del color y tonalidad en el vellón de la vicuña. Los FTIR en fibra de vicuñas de Puno y Apurímac se superponen, lo que confirma similar perfil químico en la estructura de la fibra. El porcentaje de medulación total es diferente según la procedencia, donde las vicuñas de la Comunidad de Toma (Puno) tienen mayor porcentaje de medulación (5.02%), mientras que las vicuñas de las comunidades de Pilluni (1.65%) y Taraccasa (1.80%) de Apurímac mantienen un menor porcentaje de medulación. Asimismo, se observa variabilidad del porcentaje de fibras con médula fragmentada y fuertemente medulada según la procedencia de las vicuñas. En conclusión, las vicuñas de Puno y Apurímac muestran fibras con similares características químicas, pero con variaciones fenotípicas en intensidad de color, tonalidad de fibra y en el porcentaje de fibras meduladas.

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“…Domestic South American camelids exhibit a diversity of pigmentation patterns. Alpaca fiber is the most valuable product used in the textile industry and has a wide variety of natural colors (Oria et al, 2009;Jost et al, 2020), as is shown by the continuous variation in pigmentation found in Peruvian alpacas (Cruz et al, 2021;Pinares et al, 2021) and through chemical analysis (Wang et al, 2005;Cransberg et al, 2013). However, the production of colored fiber has decreased over time, directly influenced by the higher price of white fiber, and exacerbated by the erosion of genetic diversity in the Andean camelid population (Antonini and Vinella, 1997;Aragoń and Mamani, 2018;Anello et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Comparing fiber quality characteristics and staple length in Suri and Huacaya alpacas

Pinares

Meza

Crispín³

et al. 2023

Front. Anim. Sci.

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IntroductionThe textile industry considers alpaca fiber to be a specialty fiber. The aim of this study was to evaluate the influence of color, breed, location, age, and sex of alpacas on fiber quality characteristics and staple length.MethodsFiber samples were taken from the mid-side of 118 Huacaya and Suri alpacas at two livestock shows (Pitumarca and Maranganí) and at CICAS La Raya (South American Camelid Research Center), which is located in the province of Canchis (Cusco, Peru).Results and discussionThe fiber characteristics and staple length in black alpacas are similar to those of brown alpacas. Huacaya fiber is finer, having a lower mean fiber diameter (MFD), SD, and coefficient of variation of MFD than Suri fiber. Alpacas from the two livestock shows have higher-quality fiber than unselected alpacas raised in CICAS La Raya. Staple length is longer in Suri alpacas than in Huacaya alpacas. Likewise, the staple length is longer in alpacas from Pitumarca, followed by alpacas from Maranganí, and is shorter in alpacas from CICAS La Raya. Young alpacas have a shorter staple length than adults, and it is longer in females than in males. The mean fiber diameter and spinning fineness are strongly correlated with other fiber characteristics in colored alpacas.ConclusionThese black and brown alpacas raised in small herds and judged in two livestock shows produce high-quality fiber at 22 µm for the textile industry.

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Polimorfismos de nucleótido simple (PNSs) del gen MC1R en alpacas negras y marrones

Cited by 3 publications

References 21 publications

MC1R Gene Variants and Their Relationship with Coat Color in South American Camelids

MC1R Gene Variants and Their Relationship with Coat Color in South American Camelids

Comparaciones de la espectroscopía infrarroja por transformada de Fourier (FTIR), parámetros colorimétricos y porcentaje de medulación en fibra de vicuña

Comparing fiber quality characteristics and staple length in Suri and Huacaya alpacas

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