CIM22EAPP1-02-09

CIM22EAPP1-02-09 is an early-maturing, high-yielding, white maize hybrid with drought tolerance, nitrogen-use efficiency, and resistance to GLS, TLB, ear rots, MLN, and rust. The product is notable for being preferred by farmers, for its high yield potential even under significant disease pressure (esp. MLN & GLS), and for having good seed parent yield.    General Information   Target region Eastern Africa   Adaptation/Agroecological zone 1000-1600 masl   Type of product Three-way cross   Year first announced 2024         Why farmers say they like it*   High yield, good husk, disease resistant         *Common keywords from farmer feedback (EA-ROFT 2023-1A) Grain Yield       Grain yield (OPT) 6.96 t/ha   Kernel Characteristics Grain yield (RS) 2.81 t/ha   Kernel color White Grain yield on-farm >3 t/ha* 5.60 t/ha   Kernel texture Semi-flint Grain yield on-farm < 3 t/ha** 1.56 t/ha       Grain yield under low N 2.87 t/ha   Biotic Stress Performance Grain yield under MD 2.74 t/ha   MLN (AI) (1-9)* 3.49 Grain yield under FAW (AI) 3.54 t/ha   Grey leaf spot (GLS) (AI) (1-9)* 3.43 Grain yield under GLS (AI) 8.14 t/ha   Common rust (nat) (1-9)* 2.60 Grain yield under TLB (AI) 7.18 t/ha   Turcicum leaf blight (TLB) (AI) (1-9)* 3.42 Grain yield under MLN (AI) 9.04 t/ha   Maize Streak Virus (MSV) Resistant allele present *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   Ear rots 3.9%   *Diseases are scored on a 1-9 scale, where 1 = Highly resistant; 5 = Tolerant; 9 = Highly susceptible.             Agronomic Characteristics   Seed Production Characteristics Maturity group Early   SC female parent yield 9.46 t/ha 50% anthesis 71.3 days   Male parent yield 3.50 t/ha (838 GDD)   Nicking -3.4 days Anthesis-silking interval  0.20       Farmers' score* 2.29   Comments Ear height  120 cm   Product information is based on data from CIMMTY's Eastern Africa 2022 Stage 4 (CIM22EAPP1B-RT) and 2023 Stage 5 (EA-ROFT 2023-1B) 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 Plant height  227 cm   Ears per plant 1.01   Bad husk cover 13.2%   Ear aspect (1-5)* 2.40   Plant aspect (1-5)* 2.75   Root lodging 8.1%   Stalk lodging 2.8%   *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)