CIM23NUVA-13

CIM23NUVA-13 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. It is especially notable for high optimum yeild, producing multiple ears per plant, excellent synchrony, flint grain, and resistance to stalk lodging.   General Information   Target region Southern Africa   Adaptation/Agroecological zone < 1800 masl   Type of product Three-way cross hybrid   Year first announced 2024         Grain Characteristics   Grain color Orange   Grain texture Flint       Provitamin A content 11.9 µg/g Grain Yield       Grain yield under optimum conditions 7.79 t/ha   Biotic Stress Performance Grain yield under managed drought stress 2.37 t/ha   Turcicum leaf blight (TLB) (1-9)* 1.9 Grain yield under low N stress 2.55 t/ha   Grey leaf spot (GLS) (1-9)* 2.4 Grain Yield on-farm (severe stress*) 1.29 t/ha   Maize Streak Virus (MSV) (1-9)* 2.4 * The 2023/24 season in Southern Africa was characterized by the worst drought of the century, declared a national disaster in several countries. Many of the farmers participating in the trial reported write-offs.    Ear rots 6.1%   *Diseases are scored on a 1-9 scale, where 1 = Highly resistant; 5 = Tolerant; 9 = Highly susceptible.       Agronomic Characteristics         Maturity Group Early-maturing   Seed Production Characteristics Days to 50% anthesis 64 DAP   SC female parent yield 7.48 t/ha 840 GDD   Male parent yield 1.71 t/ha Anthesis-silking interval 0.86 days   Nicking -4.1 days Plant height 203.6 cm       Ear height 90.7 cm   Comments Ears per plant 1.30   Product information is based on data from the CIMMYT Southern Africa 2022/23 Stage 4 and 2023/24 Stage 5 Trials.  Actual performance will vary depending on a number of agronomic and environmental factors.

Abbreviations:
DAP = Days after planting
GDD = Growing degree-days ˚ C
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) Bad husk cover 9.7%   Ear aspect (1-5)* 2.3   Root lodging 2.8%   Stalk lodging 0.0%   *Ear aspect is scored on 1-5 scale, where 1 = desirable and 5 = undesirable characteristics           Further Links     1. Full Product Announcement
(including trial results summary and site information)       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               4. Zinc and provitamin A biofortified maize genotypes exhibited potent to reduce hidden hunger in Nepal