Abstract

MARTINEZ SOLIS, Juan; VIRGEN VARGAS, Juan; PENA ORTEGA, Margarita Gisela  and  SANTIAGO ROMERO, Alejandro. Speed of emergence of inbred maize lines. Rev. Mex. Cienc. Agríc [online]. 2010, vol.1, n.3, pp.289-304. ISSN 2007-0934.

The purpose of this study was to define a classification on the vigor of seeds, using the maize line emergence and germination speed rates, using four sample sizes. The experiment was carried out in the seeds laboratory of the Plant Breeding Department of the Chapingo Autonomous University. Line and hybrid maize seeds were used, provided by the Seeds Production Program of the Valley of Mexico Experimental Center, of the National Forestry, Agriculture and Livestock Institute. Emergence in sand, standard germination and accelerated aging were tested, using a complete cluster design at random, with four repetitions of 25, 50, 75 and 100 seeds. In each test, the germination and emergence were evaluated, along with length, dry weight of the aerial and radicle sections, and percent age of germination and emergence. A variation analysis, Tukey test for comparing averages (p≤ 0.05) and Pearson correlation test were carried out. To identify the maize lines with higher vigor using the estimated sample sizes, values above3, 6, 10 and 13 are suggested as emergence rates in the sand test; in the standard germination and acceleration tests, values above 7, 14, 21 and 28 are suggested, and as germination rates, values of 9, 18, 31 and 42.

Keywords : Zea mays L.; endogamous lines; sample size; seed vigor.

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