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## Revista fitotecnia mexicana

*versión impresa* ISSN 0187-7380

#### Resumen

CARRILLO SALAZAR, J. Alfredo et al. **Adaptation of a model to evaluate seed deterioration in husk tomato**.* Rev. fitotec. mex* [online]. 2011, vol.34, n.1, pp. 53-61. ISSN 0187-7380.

Air temperature and relative humidity are the most important environmental factors affecting the viability of stored seeds. In this investigation, the viability of husk tomato *(Physalis ixocarpa* Brot.) seeds stored without control of air temperature and relative humidity, was estimated with a model designed for tomato seeds *(Lycopersicon esculentum* Mill.). The seed moisture was calculated using the air temperature and relative humidity of storage conditions, while the seed viability was calculated using the Ellis and Roberts equation. The coefficient lambda *(**λ**)* in the seed water content equation, and the values of C_{H}, *C _{W}, C_{Q},* and

*K*in the Ellis and Roberts equation were calibrated with the Marquardt and Simplex optimization methods. The mean error of the difference between observed and modeled data

_{i}*(MBE),*the mean error in percent

*(MPE),*and the root square of the mean difference between modeled and observed data

*(RMSD),*were used as bias measurements. The calibrated lambda (61.6) for husk tomato seeds was 62 % higher than that for tomato, but this calibrated value rendered an adequate average (5 %) of the seed moisture. C

_{H},

*C*and

_{W},*K*optimized simultaneously with the Simplex method produced the best calibration of the Ellis and Roberts equation, since each parameter changed less than 4.6 % from its original value, with a mean error of 3.4 % and a

_{i}*R*over 0.97. Modeled viability of husk tomato seeds was higher or equal than 85 % after 263 d of storage, and there after 50 % of viability was lost in 4 years and 5 months.

^{2}**Palabras llave
:
***Physalis ixocarpa*; seed viability; moisture content; seed longevity.