Variety traits
Zea mays L.
The vegetation period of maize is characterized by the FAO index, which links a hybrid to its requirement for the sum of effective temperatures above +10°C to achieve physiological grain maturity.
In the reference 386 varieties crop Maize, where this is mentioned in the description.
In maize agronomy, the duration of the vegetation period is determined not by calendar days, but by the FAO index — a relative measure of earliness. It reflects the plant's requirement for a sum of active or effective temperatures to complete its developmental cycle, which ends with the appearance of the 'black layer' at the base of the grain.
Hybrids are classified on the FAO scale from 100 to 600+, with each group corresponding to specific ranges of temperature sums and estimated maturity times. Choosing a hybrid with an appropriate index is critical for climate adaptation, as the high heat requirement of late-maturing varieties directly affects their yield, grain moisture loss rate, and the risk of failure to reach maturity before the onset of cold weather.
General information about the subject — on the page Vegetation period.
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Zea mays L. · Maize
PIONEER HI-BRED INTERNATIONAL
Zea mays L. · Maize
Limagrain Europe, F
Zea mays L. · Maize
Yozef Tomasich
Zea mays L. · Maize
Rene Baratin
Zea mays L. · Maize
SAATBAU LINZ EGEN
Zea mays L. · Maize
LIDEA FRANCE SAS
Zea mays L. · Maize
Ragt, F
Zea mays L. · Maize
SYNGENTA FRANCE S.A.S.
Zea mays L. · Maize
SYNGENTA FRANCE S.A.S.
Zea mays L. · Maize
PIONEER HI-BRED INTERNATIONAL
Zea mays L. · Maize
PIONEER OVERSEAS CORPORATION
Zea mays L. · Maize
Pioneer Hi-Bred International, Inc Pioneer Overseas Corporation
Zea mays L. · Maize
LEIPERT RAINER
Zea mays L. · Maize
Stephane Melkior
Zea mays L. · Maize
TAUCHER ROBERT
Zea mays L. · Maize
Philippe Moreau
Zea mays L. · Maize
Rustica Prograin Genetique
Zea mays L. · Maize
KWS Saat AG, DE
Zea mays L. · Maize
Syngenta participation AG
Zea mays L. · Maize
Stephane Melkior
Zea mays L. · Maize
SEMENCES NICKERSON
Zea mays L. · Maize
MULLER| J.P. Muller c/o Maiszuchtstation Ciba-Geigy Semences
Zea mays L. · Maize
Syngenta participation AG
Zea mays L. · Maize
Limagrain Europe S.A.S