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Vol. 16 No. 3 (2022)

Section on aromatic, medicinal and spice plants

Selection of stevia elite genotypes aiming at the development of cultivars adapted to the Brazilian Savanna

https://doi.org/10.17584/rcch.2022v16i3.14727

Published 2022-09-01

  • Fellipe Celestino de Castro
    • ,
  • Fábio Gelape Faleiro
    • ,
  • Jamile da Silva Oliveira
    • ,
  • Renato Fernando Amabile
    • ,
  • João Victor Pinheiro Melo

Fellipe Celestino de Castro
Universidade de Brasília, Faculdade de Agronomia e Medicina Veterinária, Campus Universitário Darcy Ribeiro, Brasilia

Fábio Gelape Faleiro
Embrapa Cerrados, Planaltina

Jamile da Silva Oliveira
Embrapa Cerrados, Planaltina

Renato Fernando Amabile
Embrapa Cerrados, Planaltina

João Victor Pinheiro Melo
Universidade de Brasília, Faculdade de Agronomia e Medicina Veterinária, Campus Universitário Darcy Ribeiro, Brasilia

Stevia rebaudiana (Bert.) growing at Embrapa Cerrados research fields (Distrito Federal, Brazil). Photo: F.C. Castro

Abstract

In this work, the objective was to evaluate morphoagronomic traits, correlate and select elite genotypes of Stevia rebaudiana (Bert.) Hemsley with high productivity, and adapted to Brazilian Savanna conditions. A total of 230 genotypes were evaluated, from the Embrapa Cerrados Working Collection, from 2018 to 2019, with 24 evaluations, carried out in six cuts, with each cut representing a certain moment of generation of the response data of the analyzed genotypes. Four traits were analyzed: green biomass production (g), plant height (cm), tillering number and juvenile period of each individual. The means of the characteristics of each genotype were correlated according to Pearson's correlation coefficient. The Mulamba and Mock index was applied, with a selection intensity of 10%, to choose the superior genotypes. There are high positive correlations between juvenile period, height and green biomass production. The selected population were 23 superior genotypes, based on the application of rank sum resulting in high selection gains for the traits of interest. Finally, the selection of elite stevia genotypes with high production of green biomass, greater insensitivity to length of the daily light period, as well as taller plants, are essential for the continuity of the stevia breeding program on the Brazilian Savanna.

Keywords

Stevia rebaudiana (Bert.) Hemsley, Breeding programs, Correlation, Yield increases, Tillering, Vegetative stage, Plant height

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References

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