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Chilean journal of agricultural & animal sciences

versão impressa ISSN 0719-3882versão On-line ISSN 0719-3890

Resumo

PACCAPELO, Héctor et al. TRITICALE (x Triticosecale Wittmack): YIELD AND YIELD COMPONENTS IN A SEMIARID ENVIRONMENT OF ARGENTINA. Chil. j. agric. anim. sci. [online]. 2017, vol.33, n.1, pp.45-58. ISSN 0719-3882.  http://dx.doi.org/10.4067/S0719-38902017005000201.

Grain yield per unit area and some yield components of eighteen experimental strains and three dual-purpose cultivars of triticale were evaluated from 2009 to 2015 in Santa Rosa (36°37' S, 64°17' W), Province of La Pampa, Argentina, on a petrocalcic Paleoustol soil under natural conditions. The trial was conducted using a randomized complete block design with three replications and standard plots. ANOVA was used to analyze the variables studied, while comparisons between means were made using least significant differences (p < 0.05). Interrelationships between traits were analyzed using phenotypic correlations, path coefficients analysis and principal components. Grain yield per unit area was the dependent variable. The yield components considered were: number of grains m2, number of spikes m2, number of grains per spike, and 1000-grain weight. The source of variation 'years' explained more than 70% of the total variation, whereas 'genotypes' accounted for less than 10%. Genotype x year interaction was significant for 1000-grain weight. Experimental strains yielded 9% more than the checks. The four best strains yielded up 3,000 kg ha-1,which represented 25% more than the checks. Grain yield per unit area of experimental triticale strains was positively and significantly correlated with the 1000-grain weight (r = 0.49****) and the number of spikes m2 (r =0.25**).

Palavras-chave : Triticale; phenotypic correlations; path coefficients; principal components.

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