Abstract only

The 'Arsenal' collection comprises about 145 accessions of spring wheat and 150 accessions of winter wheat derivatives of hybrids involving various species, including Aegilops speltoides, Ae. triuncialis, Triticum kiharae and Secale cereale. About 40% of spring genotypes are resistant to leaf rust (severities <20%) and 60% are resistant to powdery mildew (severity <10%). In Ethiopia in 2010 part of the collection (31 spring wheat accessions) was evaluated against Pgt race Ug99 in the field, and seedlings of 59 winter wheat accessions were evaluated in greenhouse seedling tests. Spring accession 113/00-4, a derivative of Ae. triuncialis was immune in the field. Seven winter habit Ae. speltoides, derivatives were resistant in the seedling tests (IT 0;, 1, or 2). The collection was evaluated against yellow (stripe) rust in Turkey (Central Field Crop Research Institute, Hayman Station) where the pathogen population was avirulent for genes Yr1, 3, 4, 5, 10, and 15. More than a half of the winter accessions in the collection were resistant. Postulation of the Lr and Sr genes in the resistant accessions is currently underway.

Global Wheat Program

English

Lucia Segura

INT1787

CIMMYT Staff Publications Collection