Broad spectrum insect resistance and metabolites in close relatives of the cultivated tomato.

Wild relatives of tomato possess effective means to deal with several pests, among which are a variety of insects. Here we studied the presence of resistance components against and in the Lycopersicon group of section by means of bioassays and comprehensive metabolite profiling. Broad spectrum resistance was found in and a few accessions of .

Partial preferential chromosome pairing is genotype dependent in tetraploid rose.

It has long been recognised that polyploid species do not always neatly fall into the categories of auto- or allopolyploid, leading to the term 'segmental allopolyploid' to describe everything in between. The meiotic behaviour of such intermediate species is not fully understood, nor is there consensus as to how to model their inheritance patterns. In this study we used a tetraploid cut rose (Rosa hybrida) population, genotyped using the 68K WagRhSNP array, to construct an ultra-high-density linkage map of all homologous chromosomes using methods previously developed for autotetraploids.

Characterization of PR-10 genes from eight Betula species and detection of Bet v 1 isoforms in birch pollen.

Background: Bet v 1 is an important cause of hay fever in northern Europe. Bet v 1 isoforms from the European white birch (Betula pendula) have been investigated extensively, but the allergenic potency of other birch species is unknown. The presence of Bet v 1 and closely related PR-10 genes in the genome was established by amplification and sequencing of alleles from eight birch species that represent the four subgenera within the genus Betula.