Prediction of parental combination for introduction of stay-green associated loci in wheat

Abstract

Parental selection for crossing blocks is decisive in the formation of potential populations, denoting that some basic principles should be considered: i) parents with genetic dissimilarity: ii) high performance per se and: iii) combining ability ). Thus, the genetic dissimilarity between high performance parents is crucial in the formation AbstractIn wheat, the increase of yield and stability associated traits can be achieved by combining parents containing the stay-green trait and favorable alleles for grain yield. The aim of this work was to analyze the genetic dissimilarity between wheat lines from stay-green and synchronized maturation groups and elite cultivars. Moreover, to propose promising combinations seeking the selection of high-grain yield and high bread-making quality genotypes containing stay-green trait. The experiment was conducted in a randomized block design with three replications in 2003, 2004, and 2005, using sister-lines with the presence and absence of stay-green trait and elite cultivars. Genetic variability exists among wheat strains from the synchronized stay-green maturation group and elite cultivars. Genotypes of maturation group stay-green obtained an average performance superior to the synchronized group. Crosses between stay-green lines and the CEP 29 and BRS 177 cultivars are promising in the selection of genotypes carrying the stay-green trait with high yield and bread-making quality.

Research Article The supply of nitrogen fertilizer in wheat to the highest environmental quality with satisfactory yield

“…Studies that enable technologies to reverse and/or minimize nitrogen losses to the environment and generate satisfactory grain productivity with greater sustainability, are decisive in today's agriculture that seeks technical, economic and environmental efficiency (Scremin et al, 2017;Luche et al, 2017). Thus, strategies to increase the efficiency of nitrogen use in wheat growing are being increasingly sought after, evidencing the need to relate the way of supplying the nutrient in full or fractional doses, along with biological responses in successions systems and meteorological conditions during species growing.…”