CIM22EAPP2-03

CIM22EAPP2-03 is a late-maturing, high-yielding, white maize hybrid, with resistance to GLS, TLB, rust, ear rots, root & stalk lodging, bred for use in tropical, rainfed, wet upper mid-altitude areas in eastern Africa and similar agroecologies. It is notable for good seed producibility.   General Information   Target region Eastern Africa   Adaptation/Agroecological zone 1300-1900 masl   Type of product Three-way cross   Year first announced 2024         Why farmers say they like it*   High yield, strong stalk, good husk       Grain Yield   *Common keywords from farmer feedback (EA-ROFT 2023-1A) Grain yield (Opt) 9.65 t/ha       Grain yield (RS) 3.97 t/ha   Kernel Characteristics Grain yield on-farm >3 t/ha* 7.07 t/ha   Kernel color White Grain yield on-farm < 3 t/ha** 1.89 t/ha   Kernel texture Semi-flint Grain yield under low N 2.34 t/ha       Grain yield under MD 4.08 t/ha   Biotic Stress Performance Grain yield under Striga (AI) 3.30 t/ha   Grey leaf spot (GLS) (AI) (1-9)* 3.00 Grain yield under FAW (AI) 4.43 t/ha   Turcicum leaf blight (TLB) (AI) (1-9)* 3.70 Grain yield under GLS (AI) 4/41 t/ha   Rust (nat.) (1-9)* 2.73 Grain yield under TLB (AI) 7.96 t/ha   Ear rots 8.3% Grain yield under MLN (AI) 0.99 t/ha   *Diseases are scored on a 1-9 scale, where 1 = Highly resistant; 5 = Tolerant; 9 = Highly susceptible. *Average of ROFT sites where grain yield was greater than 3 t/ha
**Average of ROFT sites where grain yield was less than or equal to 3 t/ha           Seed Production Characteristics       SC female parent yield 11.26 t/ha Agronomic Characteristics   Male parent yield 2.26 t/ha Maturity group Late   Nicking -3.1 days 50% anthesis 90 days       (839 GDD)   Comments Anthesis-silking interval  1.02 days   Product information is based on data from Eastern Africa 2022 Stage 4 (CIM22EAPP2-RT) and 2023 Stage 5 (EA-ROFT 2023-P2) Trials. 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
Opt = Optimal management
ROFT = Regional On-Farm Trials
RS = random stress
SC = single-cross
TLB = Turcicum Leaf Blight Farmers' score* 2.22   Ear height  134 cm   Plant height  258 cm   Ears per plant 1.35   Bad husk cover 13.4%   Ear aspect (1-5)** 2.40   Plant aspect (1-5)** 3.07   Root lodging 6.2%   Stalk lodging 3.9%   *Farmers' Score is based on a 1-5 scale where 1 = most preferred and 5 = least preferred
**Plant and ear aspects are scored on 1-5 scale, where 1 = desirable and 5 = undesirable characteristics               Further Links   Full Product Announcement
(including trial results summary and site information)