Genotype x environment interaction of agronomic and processing quality traits in potato

Abstract

At the main crop production region of Rio Grande do Sul state, Brazil, potato is cultivated in two different growing seasons: autumn and spring. The objectives of this research paper were: i) identify potato clones with high yield potential and industrial quality for Autumn and Spring growing seasons in the northern/northeastern region of the state; ii) estimate the effects of environment and of the genotype x environment interaction on the expression of agronomic and processing quality traits of potato clones in order to determine the appropriate strategy for breeding potato for the target region. One hundred and seventy clones of nine families were developed and compared to the cultivars Atlantic, Baronesa, Catucha, Ciclamen, Hertha, Lady Roseta, Macaca, Monalisa and Vivaldi and to the clone SMIJ 461-1, in the autumn and spring of 2006, in Passo Fundo, northern Rio Grande do Sul state. The evaluated traits included number of tubers per plant, tuber weight, plant yield, presence of deep eyes, dry matter content and chip color. Genotype x environment interaction (G x E) was significant for the expression of all traits but processing quality traits like chip color were most influenced by the growing season conditions. Genetic potential expression for yield traits was maximized in the spring season. Superior clones combining agronomic and quality traits were identified at the two growing seasons. High correlation between the two growing seasons was observed for the presence of deep eyes and dry matter, indicating they can be selected at either season.

Desempenho agronômico e ganho genético pela seleção de pinhão-manso em três regiões do Brasil

“…As progênies selecionadas, portanto, apresentam desempenho diferente do previsto pelo modelo matemático da simples soma direta dos efeitos de genótipo, em um determinado ambiente, o que é comum na avaliação de caracteres quantitativos, principalmente os de maior complexidade, como a produtividade de grãos (Laviola et al, 2010;Ardelean et al, 2012;Augustin et al, 2012;Bose & Subudhi, 2012;Revanappa et al, 2012). Assim, estudos mais detalhados sobre a interação genótipo x ambiente (GxA) são necessários, para que a interação possa ser interpretada e contornada, e para que não interfira negativamente na seleção de plantas.…”

Produtividade e formato de raízes tuberosas de batata-doce em função do número de gemas enterradas

“…Esse valor foi inferior ao verificado por Andrade Junior et al (2012) ao estudar 12 clones. A diferença na massa seca entre variedades é comum em batata-doce (Gonçalves Neto et al, 2011), mandioca (Rós et al, 2011) e batata (Augustin et al, 2012). O formato das raízes, verificado pelo comprimento, diâmetro e relação comprimento e diâmetro, não variou em função do número de gemas enterradas (Tabela 2), o que está relacionado à não variação das demais características estudadas.…”

Interaction of Eggplant Genotypes by Cropping Systems and Correlations between Characters

“…Quantitative characters, especially affected by the environment, present frequent significance of this effect. The different conditions in the vegetable production systems justify the search for information necessary for the rational exploitation of existing resources [10,11].…”