HP1304

CIMMYT's biofortified PVA maize pipeline focuses on developing high-yielding, nutritious maize hybrids that have orange grain and are drought tolerant, NUE, resistant to GLS, TLB, ear rots, and MSV, and are suitable for food use in tropical rainfed dry/wet mid-altitude areas in southern Africa.   General Information   Adaptation/Agroecological zone 800-1500 masl   Region Southern Africa   Type of product Three-way cross hybrid   Year first announced 2017         Grain Characteristics   Grain color orange       Grain texture Semi-flint Grain Yield   PVA content 7.5µg/g Grain yield (MEA) (OPT) 10 t/ha       Grain yield (MEB) (OPT) 6.9 t/ha   Biotic Stress Performance Grain yield (MEC) (RS) 5.4 t/ha   Turcicum leaf blight (TLB) (1-9) 1.6 Grain yield under drought stress 3.0 t/ha   Rust (1-9) 1.0 Grain yield under low N stress (NUE) 2.7 t/ha   Maize Streak Virus (MSV) (1-9) 2.9       Grey leaf spot (GLS) (1-9) 2.6 Agronomic Characteristics   Ear rot  5.1% Maturity Early   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. Days to 50% Anthesis 62.6   Anthesis-silking interval 0.5 days       Bad husk cover 1.3%   Seed Production Characteristics Ear aspect (1-5) 3.1   Female seed yield  8.3 t/ha Ears per plant 1.4   Male seed yield  1.9 t/ha Ear height 71.4 cm   Nicking 2.4 days Plant height 164.7       Root lodging 8.5%   Comments Stalk lodging 1.1%   Product information is based on data from the CIMMYT Southern Africa Maize Regional On-Station 2017 Trials. Actual performance will vary depending on a number of agronomic and environmental factors.

Abbreviations:
GLS = Grey Leaf Spot
masl = Meters above sea level
MEA = Mega-environment A (wet upper mid-altitudes)
MEB = Mega-environment B (wet lower mid-altitudes)
MEC = Mega-environment C (dry mid-altitudes)
MSV = maize streak virus
NUE = Nitrogen Use Efficient
PVA = Provitamin A
TLB = Turcicum Leaf Blight Plant and ear aspects are scored on 1-5 scale, where 1 = desirable and 5 = undesirable characteristics           Further Links   1. Maize Mega-Environments (map)     2. Biofortified orange maize is as efficacious as a vitamin A supplement        3. Provitamin A maize within the maize seed systems and grain value chain in Tanzania