Abstract
ABSTRACT Potato genotypes were evaluated in their performance, according to the genotype values for tuber yield traits. The experiments were carried out in Canoinhas and Pelotas, Brazil, in spring 2014. Eleven advanced clones and two commercial cultivars (Agata and Asterix) (check cultivars) were evaluated. A randomized complete block design with four replicates was used. Plots were harvested 110 days after planting, and evaluated for tuber yield components. The data were submitted to joint deviance analyzes using the REML/BLUP method. Clones F102-22-07 and F32-02-06 stood out positively for tuber yield. F102-22-07 showed high marketable tuber yield and average tuber weight, while clone F32-02-06 exhibited high marketable and total tuber yield. The superiority of these advanced clones in relation to the check cultivars, suggests their potential to be evaluated in other environments, aiming their release as new cultivars.
Highlights
Verificou-se o desempenho de genótipos de batata de acordo com os valores genotípicos para caracteres de rendimento de tubérculos
Development of Brazilian potato cultivars adapted to growing conditions of the country producing regions and with resistance to main diseases, is the most viable alternative to increase yield and profitability of this crop for growers (Gadum et al, 2003)
The main potato cultivars grown in Brazil are of European origin and, being not well adapted to the Brazilian environment (Kooman & Rabbinge, 1996; Menezes et al, 2001; Pinto et al, 2010), show shorter vegetative cycle and lower yield, besides suffering greater pressure from pathogens and pests when grown here
Summary
Verificou-se o desempenho de genótipos de batata de acordo com os valores genotípicos para caracteres de rendimento de tubérculos. The main potato cultivars grown in Brazil are of European origin and, being not well adapted to the Brazilian environment (Kooman & Rabbinge, 1996; Menezes et al, 2001; Pinto et al, 2010), show shorter vegetative cycle and lower yield, besides suffering greater pressure from pathogens and pests when grown here. According to Borges et al (2010), inferences about genetic materials in field experiments, in order to identify those to be released as cultivars, should be based on true genotypic values, that is, on genotypic and non-phenotypic means These estimates can be obtained using the best linear unbiased prediction (BLUP) and the restricted maximum likelihood (REML) methods. According to Resende (2002b), the REML procedure is equivalent to ANOVA in cases where the experiments are simple and balanced and meet the assumptions of the latter
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