The IWYP Hub based in Ciudad Obregon, Mexico, offers an array of services, technology, and germplasm resources to IWYP Partner and Aligned projects. This study provides general information about the Hub, as well as descriptions of several germplasm populations being utilized within the IWYP project. For more information about the IWYP Hub, please contact the IWYP Hub Coordinator, Dr. Jacinto Gimeno: J.Gimeno@cgiar.org .
Agronomic systems based on zero tillage and residue retention are becoming more important due to their potential for climate change adaptation through the reduction of soil erosion and improved water availability. Genotype by tillage interactions for yield are not well understood and it is unknown whether tillage should be an evaluation factor in breeding programs. Twenty-six CIMMYT bread (Triticum aestivum) and durum (Triticum turgidum) wheat genotypes, created between 1964 and 2009, were tested for yield and agronomic performance at CIMMYT’s experimental station near Ciudad Obregon, Mexico, over six years (harvest years 2010 to 2015). Treatments included conventional and permanent raised beds with full and reduced irrigation. The data set contains data on wheat performance (days to flowering and maturity, plant height, harvest index, grain yield, thousand grain weight, test weight, NDVI during early vegetative growth and maximum NDVI), performance traits calculated from these data (.e.g number of grains per m2, number of grains per spike, grain production rate from flowering to maturity) and monthly weather data during the study period (reference evapotranspiration, precipitation, maximum, minimum and average temperature).
CIMMYT’s durum wheat breeding program performed parallel selection in conventional tilled (CT) and zero tillage (ZT) soils with the aim to compare the effect of selection under either CT or ZT on the performance of selected progenies. From 16 initial crosses, 234 lines were selected under CT and 250 under ZT. All 484 lines were subsequently tested for yield and growth traits during three seasons (winter 2012-2013, 2013-2014 and 2014-2015) near Ciudad Obregon, Sonora, Mexico in three different testing environments. Those included ZT and CT with full irrigation and CT with reduced irrigation. The experiment was set-up as an alpha lattice design with three replications for each testing environment. Within each replication, genotypes were arranged randomly in three blocks of 160 and 170 genotypes. The dataset includes the following data: days to heading (DH), plant height (PHT), grain yield (GY) and two NDVI values (NDVI1 and NDVI2). Throughout the experiment, NDVI readings were recorded at regular intervals and growth curves were created based on the obtained data. For analysis, two values were selected, one measurement during early vegetative growth (NDVI1), around four weeks after planting, and the second at maximum growth (NDVI2).
