The diploid D genome species, Aegilops tauschii Coss. is source of allelic variation for hexaploid wheat, Triticum aestivum L and has provided numerous genes for resistance to diseases and insect pests. Direct crossing of Ae. tauschii accessions with an elite wheat breeding line transferred resistance to the Ug99 races of wheat stem rust. Bulked segregant analysis of BC2F1 genotypes with SSR loci across the D genome identified the chromosome locations of four stem rust resistance genes from four different Ae. tauschii accessions. Fine mapping is underway for a gene located distally on 6D. In the process of gene transfer, a nested design population was developed that samples the D genomes of seven different Ae. tauschii accessions in a single bread wheat background enabling the evaluation of novel quantitative variation. An additional three stem rust resistance genes have been identified this population. Currently, seed dormancy traits, pre-harvest sprouting resistance and amylase activity are being investigated.
Capturing D Genome Variation for Wheat Improvement
Video Apr 13, 2015
Professor Sir Doug Turnbull from the Wellcome Trust Centre for Mitochondrial Research at the University of Newcastle explains his research into mitochondrial donation, the innovative treatment that hopes to stop faulty mitochondria being passed on from mother to child to prevent incurable genetic diseases.
The first babies conceived with this treatment through IVF may be born in the UK soon.
From their diet to their diseases, koalas are pretty special. Now researchers have sequenced the koala’s genome, unlocking the secrets that make these fuzzy fellas so unique. The genome is revealing everything from how koalas cope with munching poisonous eucalyptus leaves, to how they respond to chlamydia infections. The hope is that these insights will not only help us understand these fascinating marsupials, but also aid conservation efforts across Australia.