HP1303

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 7.8µg/g Grain yield (MEA) (OPT) 9 t/ha       Grain yield (MEB) (OPT) 6 t/ha   Biotic Stress Performance Grain yield (MEC) (RS) 3.0 t/ha   Turcicum leaf blight (TLB) (1-9) 2.0 Grain yield under drought stress 3.9 t/ha   Rust (1-9) 2.3 Grain yield under low N stress (NUE) 2.3 t/ha   Maize Streak Virus (MSV) (1-9) 3.2       Grey leaf spot (GLS) (1-9) 1.1 Agronomic Characteristics   Ear rot  0.4% 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 60.9   Anthesis-silking interval 0.3 days       Bad husk cover 0.0%   Comments Ear aspect (1-5) 2.7   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 Ears per plant 1.4   Ear height 108.2 cm   Plant height 196.7 cm   Root lodging 0.3%   Stalk lodging 2.5%   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