HP1301

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 2015         Grain Characteristics   Grain color orange       Grain texture Semi-flint Grain Yield   PVA content 12.0µg/g Grain yield (MEA) (OPT) 10 t/ha       Grain yield (MEB) (OPT) 7 t/ha   Biotic Stress Performance Grain yield (MEC) (RS) 3.89 t/ha   Turcicum leaf blight (TLB) (1-9) 1.9 Grain yield under drought stress 3.7 t/ha   Rust (1-9) 2.6 Grain yield under low N stress (NUE) 3.14 t/ha   Maize Streak Virus (MSV) (1-9) 2.2       Grey leaf spot (GLS) (1-9) 1.0 Agronomic Characteristics   Ear rot  1.4% 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 60.7   Anthesis-silking interval 1.0 days       Bad husk cover 3.3%   Seed Production Characteristics Ear aspect (1-5) 1.8   Female seed yield  10.1 t/ha Ears per plant 1.1   Male seed yield  3.1 t/ha Ear height 89.9 cm   Nicking 2.3 days Plant height 175.7 cm       Root lodging 1.4%   Comments Stalk lodging 1.4%   Product information is based on data from the CIMMYT Southern Africa Maize Regional On-Station 2015 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