Waterlogging Effects in Adventitious Roots, Tillering and Yield of Bread Wheat Germplasm

In the context of climate changes, expected increases in intensity, frequency, and unpredictability waterlogging events will aggravate wheat yield losses, currently estimated to range between 20-50%. Wheat production must fulfill ca. 20% population’s energy protein requirements. Evaluating germplasm with different backgrounds may reveal variability for tolerance, allowing a better selection genotypes desirable traits breeding programs. this work, effect on adventitious root emission, tiller survival was evaluated. Five studied groups (Portuguese Landraces; Varieties introduced Italian germplasm; Post-Green Revolution varieties CYMMIT Advanced Lines from Portuguese Cereal Breeding Program; Australian varieties) were studied. Groups exhibited intra intervariability all parameters response imposed climatized growth chambers. After 14 days waterlogging, number roots ranged 0 7.6 plant-1, 4 Landraces depicting highest number. The living tillers at end stress highly variable, ranging reductions 100% up 35%. At harvest, productive significantly differed among genotypes, reaching some cases 138% others. existence identification key underlying tolerance contribute develop more adapted plants improve yield.