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Exploiting genotypic variability from low-altitude Brazilian Savannah-adapted Chenopodium quinoa

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Abstract

Saponin-free quinoa genotypes were evaluated in summer and autumn–winter sowings, for phenotypic traits and yield stability. They were obtained by single plant-progeny selection from hybrids, as part of the breeding efforts in adapting the crop to the Brazilian Savannah environments. The soils (Ferralsols) were limed and fertilized prior to cultivation. The experiment was sown in two dates: 20th December 2006 (summer), and 30th April 2007 (autumn–winter), at 15°39′ and 16°14′ S latitude, 47°27′ and 47°44′ W longitude, with altitudes of 976 and 1,110 m, respectively. The mean temperature and rainfall for the summer sowing were 23.0°C and 723 mm. In autumn–winter, under controlled irrigation, the mean temperature was 2.9°C lower than in summer, when plants were exposed to water logging spells. The treatments consisted of fourteen selected genotypes and the varieties Kancolla, BRS Piabiru and Q4.5, used as controls. Comparisons were based on plant height, biomass and grain yield, harvest index (HI) and 1,000 seed weight. The experimental design was a complete randomized bloc, with three replications. Analysis of variance was performed for each sowing and jointly. Statistical differences for the environments were evident only for grain size and plant height. The performance of selected genotypes in each sowing date and in the joint analysis, allows saying that populations Q0779, Q0780 and Q0782 are potentially useful in the acquisition of stable genotypes for the Brazilian Savannahs.

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Acknowledgments

The authors want to express their sincere gratitude to the National Research and Development Council (CNPq), and the Coordination for the Improvement of Higher Education Personnel (CAPES), for financial support; the agronomists Sebastião Conrado de Andrade and Alberto Luiz Wanderley, of Dom Bosco and Moça Terra Farms, for their help in conducting experimentation.

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  1. Faculdade de Agronomia e Medicina Veterinária Universidade de Brasília, Campus Universitário Darcy Ribeiro, Brasília, 70910-900, Brazil

    Carlos Roberto Spehar & Juliana Evangelista da Silva Rocha

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  1. Carlos Roberto Spehar
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  2. Juliana Evangelista da Silva Rocha
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Correspondence to Carlos Roberto Spehar.

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Spehar, C.R., da Silva Rocha, J.E. Exploiting genotypic variability from low-altitude Brazilian Savannah-adapted Chenopodium quinoa . Euphytica 175, 13–21 (2010). https://doi.org/10.1007/s10681-010-0154-7

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  • DOI: https://doi.org/10.1007/s10681-010-0154-7

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