CIM21EAPP1-02-13

CIM21EAPP1-02-13 is an early-maturing, high-yielding, white maize hybrid with drought tolerance, nitrogen-use efficiency, and resistance to MLND, GLS, TLB and ear rots. The product is notable for its stay-green character, double-cobbing, flint-grained and good husk cover.   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) 7.82 t/ha   Drought tolerant, double cobs Grain yield on-farm 6.04 ± 2.32 t/ha   Grain yield (RS) 2.98 t/ha   *Common keywords from farmer feedback (EA-ROFT 2022-1A) Grain yield under low N stress 2.81 t/ha       Grain yield under managed drought 3.04 t/ha   Kernel Characteristics Grain yield under FAW (AI) 4.03 t/ha   Kernel color White Grain yield under MLN stress (AI) 4.44 t/ha   Kernel texture Flint           Agronomic Characteristics   Biotic Stress Performance Maturity group Early   MLN (AI) (1-9)* 4.5 50% anthesis 69 days   Grey leaf spot (GLS) (AI) (1-9)* 3.0 (711.3 GDD)   Turcicum leaf blight (TLB) (AI) (1-9)* 4.5 Anthesis-silking interval  0.0 days   Common rust (nat.) (1-9) 1.4 Ear height  131 cm   Ear rots (nat.) 3.1% Plant height  243 cm   *Diseases are scored on a 1-9 scale, where 1 = Highly resistant; 5 = Tolerant; 9 = Highly susceptible. Ears per plant 1.3   Bad husk cover 9.0%       Ear aspect (1-5)* 2.3   Seed Production Characteristics Plant aspect (1-5)* 2.5   SC female parent yield 6.52 t/ha Root lodging 6.2%   Male parent yield 1.86 t/ha Stalk lodging 4.4%   Nicking -1.3 days Farmer score (1-5)** 2.85       *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)