Abstract

SOL SANCHEZ, Ángel; MEGIA VERA, Héctor Javier; PEREZ FLORES, Julián  and  LOPEZ UPTON, Javier. Size - seed germination relationship in Mahogany (Swietenia macrophylla King) in UMAF 2702ST Tenosique Sierra. Rev. Mex. Cienc. Agríc [online]. 2016, vol.7, n.spe14, pp.2783-2791. ISSN 2007-0934.

The aim of this study was to measure mahogany seed size (Swietenia macrophylla King), and evaluate germination. The research was conducted in 2010 in the forest management unit (UMAF-2702ST) located in the region South Rivers from Tabasco. Seeds were collected from selected trees in the UMAF-2702ST Tenosique Sierra, Tabasco, Mexico. Length and width of the seed was determined through X-ray with a Faxitron (MX20, Faxitron X-ray Corporation, Wheeling, IL, USA), calibrated to 120 s and 26 kv power (kVp). Germination was performed on a programmable germination chamber at 30 ± 2 °C (C/N) and a photoperiod of 16 h light and 8 hours darkness and relative humidity at 75. The analysis of variance was performed by UMAF- 2702ST Tenosique Sierra communities as the dependent variable of collected seeds, and as an independent variable seed length and width; subsequently means test was applied through Tukey, with an alpha 0.05. Pearson correlation coefficient was calculated for the variables seed length, width and seed germination. Analysis of variance and correlation models were analyzed using the statistical package SAS using the procedures PROC GLM and CORR. The size of mahogany seeds gave a normal distribution according to Shapiro-Wilk test modified for seed length and width variables. The most common seed length was 16.5-18.5 mm from 119 seeds (28%) of the total. Germination was 100% in trees from Santo Tomas, of 63.3% in the tress from Boca del Cerro, while in trees from San Marcos there was no correlation between seed length and width with seed germination.

Keywords : germination; mahogany; seeds.