Variación fenotípica intra- e inter-poblaciones en siete poblaciones de quinua del Altiplano Boliviano
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Abstract
La quinua (Chenopodium quinoa Willd.) muestra una gran variación genética, tanto molecular como morfológica, cuya organización sigue poco conocida. Por medio de ANOVAs y dendrograma caracterizamos la estructura de la variación de marcadores morfo-fenológicos registrados desde la emergencia hasta la madurez fisiológica en siete poblaciones de quinuas cultivadas dos años en jardín común. Los resultados muestran que la varianza morfo-fenológica se concentra en niveles de población y familia, cuando los rasgos relacionados con la producción de biomasa muestran alta variación a nivel interindividual. Estos resultados tienen implicancias agroecológicas relacionadas con el origen geográfico de las poblaciones. La comparación de clasificaciones fenotípica y molecular sugiere que no hay erosión genética en las poblaciones de quinua muestreadas.
Quinoa (Chenopodium quinoa Willd.) shows great genetic variation, both molecular and morphological, which organization remains poorly documented. Through nested ANOVAS and dendrogramme we characterized the structure of the variation in morpho-phenological traits registered from seedling emergence until plant maturity in seven quinoa populations grown in common garden for two years. Results show that the variance in morpho-phenological traits was concentrated at the population and family levels, while traits related to biomass production showed high inter-individual variation. These results have agroecological implications related to the geographic origin of the populations. A comparison of phenotypic and molecular classifications suggests that there is no genetic erosion in the sampled quinoa populations.
Quinoa (Chenopodium quinoa Willd.) shows great genetic variation, both molecular and morphological, which organization remains poorly documented. Through nested ANOVAS and dendrogramme we characterized the structure of the variation in morpho-phenological traits registered from seedling emergence until plant maturity in seven quinoa populations grown in common garden for two years. Results show that the variance in morpho-phenological traits was concentrated at the population and family levels, while traits related to biomass production showed high inter-individual variation. These results have agroecological implications related to the geographic origin of the populations. A comparison of phenotypic and molecular classifications suggests that there is no genetic erosion in the sampled quinoa populations.
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Vol. 1, No. 1