Resumo

MANJARREZ JUAREZ, Francisco Javier et al. Effect of storage time on canola seed quality. Rev. Mex. Cienc. Agríc [online]. 2017, vol.8, n.4, pp.933-948. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v8i4.18.

The quality of four varieties of canola was evaluated in Metepec, Estado de Mexico, during 2013, under laboratory and greenhouse conditions; two introduced: hybrid Hyola 401 and Monty (free pollination variety), and two varieties of free pollination obtained in Mexico: Canomex and Aztecan, which were stored in Metepec at room temperature for periods of 1, 2, 4, and 5 years. Four variables of physiological quality were determined: viability, germination percentage, emergency speed and total emergency, and two of physical quality: thousand seeds weight and volumetric weight. Varieties were compared in three groups; the first one, which included the four varieties, Aztecan and Hyola 401 were superior in most of the seed quality variables evaluated. In the second group conformed by Hyola 401 and Monty, the hybrid was significantly superior in all the quantified characteristics. In a third group the Aztecan and Canomex varieties were compared, with Aztecan resulting superior in most of the evaluated variables. Other relevant results were: 1) total emergence, as an indicator of vigor and establishment in the field, positively correlated with seed viability (r= 0.84), germination (r= 0.84), and emergency rate index (r= 0.86); 2) local varieties show greater similarities than those introduced, probably because the former share common parents, while the introduced ones have different genetic origins: Canada and Australia; and 3) the quality of canola seeds stored under natural conditions showed accelerated deterioration after one year of storage, which showed different magnitudes between the four varieties.

Palavras-chave : emergency speed; germination percentage; pollination; total emergency; variety.