Eighteen wheat lines and two cultivars were evaluated in trial carried out under sprinkler irrigation, limed and fertilized soils, at the Tatuí Agronomy Experimental Station, State of São Paulo, Brazil during 1999 and 2000. Grain yield, plant height, number of days from emergence to flowering, number of grains per spike, 100 grain weight, grain length, width and thickness were evaluated. Simple correlations between these characteristics were estimated. The occurrence of frosts at grain filling period, in 2000, resulted in grain yield reduction in all genotypes, reduction in the number of grains per spike, and also in 100 grain weight for the majority of the genotypes. The highest genotypes showed a tendency to be less affected by the frosts. The genotype 9 (BANACORA T 88) exihibited short plants; the genotypes 2 (KAUZ*2/MNV//KAUZ), 9 and 14 (WH 542) presented high number of grains per spike and the genotype 3 (SAWGAI) high 100 grain weight, in the experiment seeded in 1999. These genotypes could be used as genetic sources in crossing programs, where these traits would be desired.
Triticum aestivum L.; frost; plant height; 100 grain weight; correlations
