Genome-wide molecular markers are often being used to evaluate genetic diversity in germplasm collections and for making genomic selections in breeding programs. To accurately predict phenotypes and assay genetic diversity, molecular markers should assay a representative sample of the polymorphisms in the population under study. Ascertainment bias arises when marker data is not obtained from a ...

Plant breeding and nutrition 3 protein wheat and barley and in the possibilities of manipulating amino acid composition have encouraged breeders to proceed more positively with biochemical problems. In many ways this resurgence has been due to the wide publicity given to the potential of the opaque-z gene in maize, and the high-lysine story has stimulated expectancies which I consider are rathe...

Evaluation and characterization are crucial steps in the exploitation of germplasm collections. The Sant'Angelo Lodigiano unit of the Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CREA) maintains a broad collection of Triticum spp, including more than 4000 genotypes of T. aestivum. Such collection represents a wide source of genetic variability for many agronomic an...

Volatiles collections and cuticular extracts of the wheat stem sawfly, Cephus cinclus Norton (Hymenoptera; Cephidae), were analyzed by coupled gas chromatographic-electroantennographic detection (GC-EAD) in order to detect possible pheromone components ofthis species. Volatiles collections from male and female sawflies contained the same 13 GC-EAD-active compounds that stimulated both male and ...

Race Ug99 of Puccinia graminis f. sp. tritici, recognized for possessing virulence to Sr31, was first reported in Uganda in 1999 (Pretorius et al., 2000). Based on the North American stem rust nomenclature system of 16 differential lines (Roelfs and Martens, 1988; Roelfs et al., 1993), Ug99 is identified as race TTKS (Wanyera et al., 2006). Isolates with virulence similar to Ug99 were identifie...

The use of soil cover plants and alternative sources nitrogen fertilization can promote improvements in the biological characteristics soil. objective this study was to determine contribution isolated and/or intercropped cultivation ground crops autumn/winter poultry litter as a source N wheat crop succession on mesofauna macrofauna community. experimental design randomized blocks, with split p...