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Adriano Cirino Tomaz, Mateus Teles Vital Gonçalves, Marcos Deon Vilela de Resende, Bruno Portela Brasileiro, Luiz Alexandre Peternelli and Márcio Henrique Pereira Barbosa

ARTICLE – Genetic parameters and selection of sugarcane for borer resistance in the advanced selection stage

Abstract: This study aimed to investigate genetic parameters and selection
strategies for sugarcane resistance to borer and determine the effects of selection
for borer resistance on yield traits. The infestation index by borer (IIB) and
yield traits were assessed over 3 years in 35 sugarcane clones planted in four
locations in southeastern Brazil. There was no genotype × environment (year
or location) interaction for borer resistance. Consequently, selection may be
performed at only one location and year or by the mean of clones in several
locations and/or years. The borer population affected the genotypic variance for
borer resistance but when genotypic variance was significant, heritability was
elevated and suitable genetic gain was achieved. Selection for borer resistance
reduced the genetic gains for tons of cane per hectare, theoretical recoverable
sugar, and tons of sugar per hectare; however, satisfactory selection gains for
both borer resistance and yield were achieved using selection index.

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