ZM521

ZM521 is an early-maturing, open-pollinated maize variety (OPV) with white grain that is drought-tolerant and NUE, with resistance to GLS, MSV, and TLB, suitable for food use in tropical, rainfed, dry/wet mid-altitude and lowland ecologies in southern Africa and similar agroecologies.    General Information   Target region Southern Africa   Adaptation <1800 masl   Type of product Open-Pollinated Variety (OPV)   Year entered in Regional Trials 2005             Grain Characteristics Grain Yield   Grain color White Grain yield ME-A (optimum) 6.72 t/ha   Grain texture Semi-flint Grain yield ME-A (low N stress) 2.69 t/ha       Grain yield ME-A (disease stress) 6.48 t/ha   Biotic Stress Performance Grain yield ME-A (random stress) 4.70 t/ha   Turcicum leaf blight (TLB) (1-9)* 3.2 Grain yield ME-B (optimum) 6.73 t/ha   Grey leaf spot (GLS) (1-9)* 2.0 Grain yield ME-B (low N stress) 3.36 t/ha   Common rust (P. Sorg) (1-9)* 2.2 Grain yield ME-B (random stress) 4.76 t/ha   Ear rots 6.9% Grain yield ME-C (optimum) 4.02 t/ha   *Diseases were originally scored on a 1-5 scale but have been converted here to a 1-9 scale, where 1 = Highly resistant; 5 = Tolerant; 9 = Highly susceptible. Grain yield ME-C (random stress) 2.09 t/ha   Grain yield ME-C (striga) 1.08 t/ha             Comments Agronomic Characteristics     Product information is based on data from the 2014/15 regional trials for Early Maturing OPVs (EPOP15) evaluated at 22 locations under different management conditions in Southern Africa. Actual performance will vary depending on a number of agronomic and environmental factors.

CIMMYT grants licenses to pursue varietal registration of OPVs to qualified public-sector partners. Following successful varietal release in a country, commercial licenses may be issued to private-sector partners by CIMMYT or the varietal registrant on a non-exclusive basis, subject to the terms of the license issued to the varietal registrant.

Private-sector partners interested in commercializing a CIMMYT-derived OPV in a country where the product has not yet been released are encouraged to approach a qualified public-sector partner who may apply to CIMMYT for a varietal registration license.

Abbreviations:
ai = artificial inoculation
GLS = Grey Leaf Spot
low N = low soil nitrogen
masl = meters above sea level
ME-A = Maize mega-environment A (wet upper mid-altitudes)
ME-B = Maize mega-environment B (wet lower mid-altitudes)
ME-C = Maize mega-environment C (dry mid-altitude)
MSV= Maize Streak Virus
NUE = Nitrogen Use Efficient
OPV = open-pollinated variety
TLB = Turcicum Leaf Blight (E. turcicum) Days to 50% anthesis 65   Plant height 179.7 cm   Ear height 81.1 cm   Ear position (ratio) 0.5   Root lodging 16.2%   Ears per plant 1.0   Bad husk cover 15%   Ear aspect (1-5)* 2.6   Leaf senescence (1-10) 5.4   *Ear aspect is scored on 1-5 scale, where 1 = desirable and 5 = undesirable characteristics           Further Links   1. Results of the 2014/15 Southern Africa Regional Trials - Early Maturing OPVs (EPOP15)     2. Results of the 2004/2005 Southern Africa Regional Trials Early-Maturing OPVs (EPOP05)     3. Maize Mega-Environments (map)