Genetic structure in cultivated quinoa (Chenopodium quinoa Willd.), a reflection of landscape structure in Northwest Argentina

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Quinoa (Chenopodium quinoa Willd.), one of the main crops domesticated in the Andean highlands 1,000 of years ago, played an important role as a protein source. 35 germplasm accessions collected along the Northwest Argentina (NWA) region were studied using 22 microsat- ellite (SSR) markers. Results...

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Autores principales: Costa Tártara, Sabrina María, Manifesto, María Marcela, Bramardi, Sergio Jorge, Bertero, Hector Daniel
Formato: Articulo
Lenguaje:Inglés
Publicado: 2012
Materias:
Ciencias Agrarias
Genetic diversity
Quinoa
Germplasm Microsatellites
Northwest Argentina
Cluster analysis
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/130966
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-130966
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Agrarias
Genetic diversity
Quinoa
Germplasm Microsatellites
Northwest Argentina
Cluster analysis
spellingShingle Ciencias Agrarias
Genetic diversity
Quinoa
Germplasm Microsatellites
Northwest Argentina
Cluster analysis
Costa Tártara, Sabrina María
Manifesto, María Marcela
Bramardi, Sergio Jorge
Bertero, Hector Daniel
Genetic structure in cultivated quinoa (Chenopodium quinoa Willd.), a reflection of landscape structure in Northwest Argentina
topic_facet Ciencias Agrarias
Genetic diversity
Quinoa
Germplasm Microsatellites
Northwest Argentina
Cluster analysis
description Quinoa (Chenopodium quinoa Willd.), one of the main crops domesticated in the Andean highlands 1,000 of years ago, played an important role as a protein source. 35 germplasm accessions collected along the Northwest Argentina (NWA) region were studied using 22 microsat- ellite (SSR) markers. Results showed a great level of genetic diversity, differing from previous reports about the geographical distribution of quinoa variability. All SSR loci analysed were highly polymorphic detecting a total of 354 alleles among all populations, with an average of 16 alleles per locus. Cluster analyses grouped the accessions into four main clusters at the average genetic distance level (0.80), each of which represented a different environment of the NWA region: Puna (UHe = 0.42, ±0.07 SE), Dry Valleys (UHe = 0.27, ±0.05 SE), Eastern Humid Valleys (UHe = 0.16, ±0.04 SE) and a transition area with high altitudes between the last two environments (UHe = 0.25, ±0.03 SE). An eastward decreasing genetic diversity gra- dient was found. AMOVA analyses showed a strong genetic structure: a high population subdivision relative to the grouping by region (Fsr = 0.47) together with a high genetic differentiation among populations (Fst = 0.58) and a heterozygous defect (Fis = 0.63) in each of them. The variability structure, a reflection of the structure of the NWA landscapes, is discussed in connection with envi- ronmental variables.
format Articulo
Articulo
author Costa Tártara, Sabrina María
Manifesto, María Marcela
Bramardi, Sergio Jorge
Bertero, Hector Daniel
author_facet Costa Tártara, Sabrina María
Manifesto, María Marcela
Bramardi, Sergio Jorge
Bertero, Hector Daniel
author_sort Costa Tártara, Sabrina María
title Genetic structure in cultivated quinoa (Chenopodium quinoa Willd.), a reflection of landscape structure in Northwest Argentina
title_short Genetic structure in cultivated quinoa (Chenopodium quinoa Willd.), a reflection of landscape structure in Northwest Argentina
title_full Genetic structure in cultivated quinoa (Chenopodium quinoa Willd.), a reflection of landscape structure in Northwest Argentina
title_fullStr Genetic structure in cultivated quinoa (Chenopodium quinoa Willd.), a reflection of landscape structure in Northwest Argentina
title_full_unstemmed Genetic structure in cultivated quinoa (Chenopodium quinoa Willd.), a reflection of landscape structure in Northwest Argentina
title_sort genetic structure in cultivated quinoa (chenopodium quinoa willd.), a reflection of landscape structure in northwest argentina
publishDate 2012
url http://sedici.unlp.edu.ar/handle/10915/130966
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AT berterohectordaniel geneticstructureincultivatedquinoachenopodiumquinoawilldareflectionoflandscapestructureinnorthwestargentina
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