CIM22EAPP1-01-16

CIM22EAPP1-01-16 is an intermediate-maturing, high-yielding, white maize hybrid with drought tolerance, nitrogen-use efficiency, and resistance to GLS, TLB, ear rots, and rust. It is notable for its excellent yield potential under optimum conditions and on-farm, and good seed producibility.   General Information   Target region Eastern Africa   Adaptation/Agroecological zone 1200-1800 masl   Type of product Three-way cross   Year first announced 2024         Why farmers say they like it*   High yield, good ears, disease resistant       Grain Yield   *Common keywords from farmer feedback (EA-ROFT 2023-1A) Grain yield (OPT) 8.38 t/ha       Grain yield (RS) 4.68 t/ha   Kernel Characteristics Grain yield on-farm >3 t/ha* 6.63 t/ha   Kernel color White Grain yield on-farm < 3 t/ha** 1.95 t/ha   Kernel texture Semi-flint Grain yield under low N 2.70 t/ha       Grain yield under MD 3.49 t/ha   Biotic Stress Performance Grain yield under FAW (AI) 2.56 t/ha   MLN (AI) (1-9)* 4.05 Grain yield under GLS (AI) 5.72 t/ha   Grey leaf spot (GLS) (AI) (1-9)* 4.45 Grain yield under TLB (AI) 7.76 t/ha   Common rust (nat) (1-9)* 2.62 Grain yield under MLN (AI) 6.43 t/ha   Turcicum leaf blight (TLB) (AI) (1-9)* 4.95 *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   Maize Streak Virus (MSV) Resistant allele present   Ear rots 6.7%   *Diseases are scored on a 1-9 scale, where 1 = Highly resistant; 5 = Tolerant; 9 = Highly susceptible.       Agronomic Characteristics       Maturity group Intermediate   Seed Production Characteristics 50% anthesis 80.6 days   SC female parent yield 8.82 t/ha (825 GDD)   Male parent yield 3.12 t/ha Anthesis-silking interval  0.13 days   Nicking -3.6 days Farmers' score* 2.09       Ear height  126.7cm   Comments Plant height  242cm   Product information is based on data from CIMMTY's Eastern Africa 2022 Stage 4 (CIM22EAPP1A-RT) and 2023 Stage 5 (EA-ROFT 2023-1A) 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 Ears per plant 1.16   Bad husk cover 7.8%   Ear aspect (1-5)* 3.00   Plant aspect (1-5)* 3.04   Root lodging 2.7%   Stalk lodging 3.0%   *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)