Abstract

SALAZAR-GARCIA, S.; COSSIO-VARGAS, L. E.  and  GONZALEZ-DURAN, I. J. L.. Validation of floral development prediction models developed in Nayarit for 'Hass' avocado from several climates of Michoacán. Rev. Chapingo Ser.Hortic [online]. 2009, vol.15, n.3, pp.281-288. ISSN 2007-4034.

Using records of environmental temperature and floral development obtained from 1998 to 2006 in a semiwarm subhumid climate of the state of Nayarit, five floral development prediction models for winter and summer shoots of 'Hass' avocado were developed. The study was conducted to test prediction models generated in Nayarit for their capacity to predict the floral development on winter, spring and summer shoots of 'Hass' avocado originally cultivated in the climates of the avocado producer region of the state of Michoacán. The prediction model summer_DFA≤19 developed in Nayarit showed a strong capacity to predict floral development on summer shoots (R² = 0.94), in a data set from four climates of Michoacán which accounted for 85 % of the avocado producer region: warm subhumid Aw₁(w), semiwarm subhumid (A)C(w₀)(w), semiwarm subhumid (A)C(w₁)(w) + (A)C(w₂)(w), and temperate subhumid C(w₂)(w). Other prediction models tested did not predict floral development on winter, spring or summer flush shoots in any of the studied climates.

Keywords : Persea americana; phenology; flowering; vegetative flushes; ecophysiology.

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