ZM623

ZM623 is an intermediate-maturing, open-pollinated maize variety (OPV) with white grain, is drought-tolerant and NUE, resistant to GLS, TLB, ear rots, and MSV, and suitable for food use in tropical, rainfed, dry/wet mid-altitude and transition ecologies in southern Africa and similar agroecologies.    General Information   Target region Southern Africa   Adaptation 400-1800 masl   Type of product Open-Pollinated Variety (OPV)   Year entered in Regional Trials 2005         Grain Characteristics       Grain color White Grain Yield   Grain texture Semi-dent Grain yield under optimum conditions 6.96 t/ha       Grain yield under random stress 2.71 t/ha   Biotic Stress Performance Grain yield under low N stress 2.96 t/ha   Turcicum leaf blight (TLB) (1-9)* 4.0 Grain yield under MSV stress (ai) 6.78 t/ha   Grey leaf spot (GLS) (1-9)* 3.0       Maize Streak Virus (MSV) (1-9)* 2.2 Agronomic Characteristics   Common rust (P. Sorg) (1-9)* 2.4 Days to 50% anthesis 69   Ear rots 3.1% Plant height 184.8 cm   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. Ear height 96.7 cm   Ear Position (0-1 ratio) 0.48       Root lodging 11.8%   Comments Stalk lodging 11.2%   Product information is based on data from the 2011/2012 Regional Trials for Intermediate to Late Maturing Populations from CIMMYT evaluated at 25 locations in Southern Africa (ILPOP12). 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/infestation
GLS = Grey Leaf Spot
low N = low soil nitrogen
masl = meters above sea level
MSV= Maize Streak Virus
NUE = Nitrogen Use Efficient
TLB = Turcicum Leaf Blight (E. turcicum) Ears per plant 0.81   Bad husk cover 13%   Ear aspect (1-5)* 2.40   Plant aspect (1-5)* 4.30   Ear aspect is scored on 1-5 scale, where 1 = desirable and 5 = undesirable characteristics           Further Links   Results of the 2011/12 Southern Africa Regional Trials - Intermediate- to Late-Maturing OPVs (ILPOP12)