CIM21EAPP1-02-11

CIM21EAPP1-02-11 is an early-maturing, high-yielding, white maize hybrid with drought tolerance, nitrogen-use efficiency, and resistance to GLS, TLB, rust and ear rots. The product is notable for its long ears with flint texture and suitable for dry medium environments.    General Information   Target region Eastern Africa   Adaptation/Agroecological zone 1000-1600 masl   Type of product Three-way cross   Year first announced 2023           Grain Yield   Why farmers say they like it* Grain yield (OPT) 7.63 t/ha   Big cobs, strong stem Grain yield on-farm 5.73 ± 2.32 t/ha   Grain yield (RS) 2.71 t/ha   *Common keywords from farmer feedback (EA-ROFT 2022-1A) Grain yield under low N stress 2.76 t/ha       Grain yield under managed drought 3.34 t/ha   Kernel Characteristics Grain yield under FAW (AI) 4.87 t/ha   Kernel color White Grain yield under MLN stress (AI) 3.44 t/ha   Kernel texture Flint           Agronomic Characteristics   Biotic Stress Performance Maturity group Intermediate   MLN (AI) (1-9)* 5.0 50% anthesis 70 days   Grey leaf spot (GLS) (AI) (1-9)* 2.0 (742.3 GDD)   Turcicum leaf blight (TLB) (AI) (1-9)* 4.0 Anthesis-silking interval  0.9   Common rust (nat.) (1-9) 1.4 Ear height  128.0   Ear rots (nat.) 5.7% Plant height  246.6   *Diseases are scored on a 1-9 scale, where 1 = Highly resistant; 5 = Tolerant; 9 = Highly susceptible. Ears per plant 1.03   Bad husk cover 11.7%       Ear aspect (1-5)* 2.23   Seed Production Characteristics Plant aspect (1-5)* 2.48   SC female parent yield 7.44 t/ha Root lodging 7.5%   Male parent yield 1.90 t/ha Stalk lodging 8.9%   Nicking 1.3 days Farmer score (1-5)** 1.98       *Plant and ear aspects are scored on 1-5 scale, where 1 = desirable and 5 = undesirable characteristics   Comments   Product information is based on data from CIMMYT's East Africa 2021 Stage 4 (CIM21EAPP1B-RT) and 2022 Stage 5 (EA-ROFT 2022-1B) Trials. MSV tolerance is based on presence of genetic markers for MSV resistance.

Actual performance will vary depending on a number of agronomic and environmental factors.

Abbreviations:
AI = artificial infestation/inoculation
FAW = fall armyworm
GDD = growing degree-days (°C)
GLS = Grey Leaf Spot
Low N = managed low nitrogen
masl = meters above sea level
MLN = maize lethal necrosis
MSV = maize streak virus
nat. = natural infestation
NUE = Nitrogen-use efficient
RS = random stress
SC = single-cross
TLB = Turcicum Leaf Blight ** Farmer scores are based on a 1 to 5 scale where 1 = very good, 2 = good, 3 = mediocre, 4 = bad, 5 = very bad           Further Links   Full Product Announcement
(including trial results summary and site information)