CZH1805A

CZH1805A is an early-maturing, high yielding, drought-tolerant, nutritious maize hybrid with orange grain that is biofortified with PVA and is NUE, resistant to GLS, TLB, Ear rots, and MSV, and bred 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/Agroecological zone < 1800 masl   Type of product Three-way cross hybrid   Year first announced 2022             Grain Characteristics Grain Yield   Grain color White Grain yield under optimum conditions 6.17 t/ha   Grain texture Semi-dent Grain yield under managed drought stress 1.87 t/ha   Provitamin A content 9.9 µg/g Grain yield under low N stress 0.86 t/ha             Biotic Stress Performance Agronomic Characteristics     Turcicum leaf blight (TLB) (1-9)* 3.0 Days to 50% anthesis 63.9 days   Grey leaf spot (GLS) (1-9)* 3.9 Anthesis-silking interval 1.8 days   Maize Streak Virus (MSV) (1-9)* 2.0 Plant height 227cm   Ear rots 3.0% Ear height 126.5   *Diseases are scored on a 1-9 scale, where 1 = Highly resistant; 5 = Tolerant; 9 = Highly susceptible. Ears per plant 1.2   Bad husk cover 3.0%       Ear aspect (1-5)* 2.0   Seed Production Characteristics Root lodging 10.5%   SC female parent yield 6.78 t/ha Stalk lodging 5.3%   Male parent yield 2.20 t/ha *Ear aspect is scored on 1-5 scale, where 1 = desirable and 5 = undesirable characteristics   Nicking -1.7 days             Comments Further Links   Product information is based on data from various trials conducted by CIMMYT in southern Africa in 2019 and 2022.  Actual performance will vary depending on a number of agronomic and environmental factors.

Abbreviations:
GLS = Grey Leaf Spot
Low N = managed low nitrogen stress
masl = meters above sea level
MSV = Maize Streak Virus
NUE = nitrogen-use efficient
opt. = optimum (44,444 plants per ha)
PVA = Provitamin A
SC = single-cross
TLB = Turcicum Leaf Blight (E. turcicum) 1. Full product announcement, including southern Africa 2019 Regional Trial and 2022 Regional On-Farm Trial data        2. Biofortified orange maize is as efficacious as a vitamin A supplement        3. Provitamin A maize within the maize seed systems and grain value chain in Tanzania