Germinación y vigor de semillas en Pseudotsuga menziesii de México

Manuel Mápula Larreta; Javier López Upton; Jesús Vargas Hernández; Adrián  Hernández Livera

doi:10.35197/rx.04.01.2008.07.mm

Authors

Manuel Mápula Larreta IRENAT Colegio de Postgraduados
Javier López Upton IRENAT Colegio de Postgraduados
Jesús Vargas Hernández IRENAT Colegio de Postgraduados
Adrián Hernández Livera Colegio de Postgraduados

DOI:

https://doi.org/10.35197/rx.04.01.2008.07.mm

Keywords:

pseudotsuga, seeds, moisture content, imbibition, viability, pregermination treatment, germination

Abstract

Some parameters were evaluated to determine the seed quality of Mexican populations of Pseudotsuga menziesii. The effect of imbibition in 1% H2O2 and different periods of seed stratification at 0-2°C to promote germination was also evaluated. A wide variation was found in seed viability with values from 2 to 87 % and in the percentage of immature embryos, especially in populations from the center of the country, which is probably due to high levels of self-fertilization, crossing of genetically related individuals, or drying of cones in unfavorable conditions. The embryo occupies more than 90% of the embryonic cavity between 12 and 94 % of the seeds in the evaluated lots. The seed requires an imbibition period of 17 hours with seeds whose humidity percentage is 8.4 %, this last value is the recommended value for storing the seed of this species. Soaking in 1% H2O2 helped to produce batches with good viability, but their values improve if the seed is cold stratified for 31 days. Further research on the stratification period is required.

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