CKDHH160404

CIMMYT's eastern Africa product pipeline 1B (EA-PP1B) focuses on developing high-yielding, early maturing maize varieties with white grain, drought tolerance, NUE, and resistance to GLS, TLB, MSV, and ear rots, that are suitable for food use in tropical, rainfed, dry, mid-altitude areas in eastern Africa and similar agroecologies.    General Information   Adaptation/Agroecological zone 1000 - 1600 masl   Type of product Three-way cross hybrid   Year first announced 2019         Grain Characteristics   Grain color White   Grain texture Semi dent           Grain Yield   Biotic Stress Performance Grain yield under optimum conditions 8.4 t/ha   Turcicum leaf blight (TLB) (1-9) 3.8 Grain yield under high density 8.8 t/ha   Grey leaf spot (GLS) (1-9) 1.8 Grain yield under drought stress 5.1 t/ha   Common Rust (1-9) 2.0 Grain yield under low N stress 4.2 t/ha   FAW leaf damage  (1-9) 5.7 Grain yield under MLN art. Inoc. 0.6 t/ha   FAW cob damage  (1-9) 2.0       Grain weight loss (MW) 0.2% Agronomic Characteristics   Grain weight loss (LGB) 0.2% Maturity 138 DAP   Ear rots 3.3% Plant height 240.2 cm   Diseases were originally scored on a 1-5 scale but have been converted here to a 1-9 scale, where 1 = Highly resistant; 5 = Tolerant; 9 = Highly susceptible. Ear height 98.4 cm   Bad husk cover 6.8%       Root lodging 3.7%   Seed Production Characteristics Stalk lodging 1.0%   Female seed yield  8.0 t/h Anther-silking interval 1.2 days   Male seed yield 3.4 t/h Ear aspect (1-5) 2.4   Nicking - 3 days Plant aspect (1-5) 2.4       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 various trials conducted by CIMMYT in eastern Africa in 2019.

Abbreviations:
art. inoc. = artificial inoculation
DAP = days after planting
FAW = Fall armyworm
GLS = Grey Leaf Spot
HD = High Density (80,000 plants per ha)
Low N = Managed Low Nitrogen
masl = meters above sea level
MD = Managed drought
MSV = maize streak virus
NUE = Nitrogen Use Efficient
Opt = Optimum Management
TLB = Turcicum Leaf Blight       Further Links   Full Announcement   Trial Data Summary   Regional Trial Site Information