In hexaploid tritordeum, the storage proteins of advanced progenies from two crosses between three hexaploid tritordeum lines were analysed. The effects of allelic variation at the Glu‐B1, Glu‐Hch1 and Glu‐A3/Glu‐B3 loci on gluten strength, as measured by the sodium dodecyl sulphate sedimentation test, were determined using seeds from both crosses. Neither of the two alleles found at the Glu‐B1 locus in the crosses analysed had significant effects on gluten strength, but allelic variation at the Glu‐Hch1 and Glu‐A3/Glu‐B3 loci showed significant differences in effects on gluten strength.
-Wheat cultivar IPR 118 developed by IAPAR has a good yield potential and is widely adapted. It is early maturing and moderately tolerant to shattering and soil aluminum, moderately resistant to leaf rust and presents high gluten strength for bread-making. The overall yield exceeded controls by 13%.
The wheat cultivar IPR 85, developed by IAPAR, has important traits including early maturity and vitreous, red colored kernels. It is moderately tolerant to aluminum in the soil, moderately resistant to sprouting and shattering. It also presented moderate resistance to powdery mildew and leaf rust. The quality parameters indicated overall high gluten strength, demonstrated by the alveographic W value of 371.10 -4 J, and Hagberg Falling Number of 455 s, which indicates high quality for bread making or blending purposes. The mean grain yield was 3870 kg/ha in the North and Center-West regions of Paraná State.
Acknowledging the bio indicator importance of springtails (Hexapoda: Collembola) for soil quality, this study aimed to determine the abundance of these arthropods in different systems of rotation/succession with commercial and cover crops, while also verifying the agricultural factor associated to these arthropods’ population. In the Instituto de Desenvolvimento Rural do Paraná (IAPAR-EMATER), during six years, areas with differing crops in rotation/succession adopting the no-tillage system were studied. For each system, chemical analyses of the soil were conducted and the number of captured springtails in pitfall traps was counted. The phytosanitary products applied during the evaluations and the quantity of vegetal cover remaining after harvest were considered as well. No difference was found between the rotation/succession systems in relation to chemical soil attributes, however the largest number of springtails was found in crop covers from corn, Brachiaria sp., and canola. These crop covers, including wheat, resulted in the highest straw dry mass. When removing the system in which the predecessor crop had the highest quantities of fungicide application, a positive correlation (r = 0.63; p < 0.01) was found, between springtail abundance and highest amount of straw after the harvest. If no fungicide applications occur, the crops with the largest amount of vegetal cover favor springtail populations.
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