CIM21SAPP2-12

CIM21SAPP2-12 is an early-maturing, white, high yielding, drought tolerant, NUE, and resistant to GLS, TLB and MSV, bred for food use in tropical, rainfed, dry/wet mid-altitude and lowland ecologies in southern Africa and similar agroecologies.    General Information   Target region Southern Africa   Adaptation/Agroecological zone <1800 masl   Type of product Three-way cross hybrid   Year first announced 2022           Grain Yield   Grain Characteristics Grain yield under optimum conditions 9.14 t/ha   Grain color White Grain yield under managed drought stress 3.41 t/ha   Grain texture Semi dent Grain yield under low N stress 5.95 t/ha             Biotic Stress Performance Agronomic Characteristics   Turcicum leaf blight (TLB) (1-9)* 4.1 50% anthesis 858 GDD (°C)   Grey leaf spot (GLS) (1-9)* 3.0 Anthesis-silking interval 0.17 Days   Maize Streak Virus (MSV) (1-9)* 3.3 Plant height 259.2 cm   Ear rots 5.7% Ear height 137.9 cm   *Diseases are scored on a 1-9 scale, where 1 = Highly resistant; 5 = Tolerant; 9 = Highly susceptible. Ears per plant 1.1   Bad husk cover 7.8%       Ear aspect (1-5)* 2.4   Seed Production Characteristics Root lodging 3.5%   SC female parent yield 9.34 t/ha Stalk lodging 2.9%   Male parent yield 3.13 t/ha *Ear aspect is scored on 1-5 scale, where 1 = desirable and 5 = undesirable characteristics   Nicking -3.03 days             Comments Further Links   Product information is based on data from various trials conducted by CIMMYT in southern Africa in 2021 and 2022.  Actual performance will vary depending on a number of agronomic and environmental factors.

Abbreviations:
GDD = growing degree-days
GLS = Grey Leaf Spot
Low N = managed low nitrogen stress
masl = meters above sea level
MSV = Maize Streak Virus
opt. = optimum (44,444 plants per ha)
SC = single-cross
TLB = Turcicum Leaf Blight (E. turcicum) Full product announcement, including southern Africa 2021 Regional Trial and 2022 Regional On-Farm Trial data