Dissecting the Genetic Complexity of Fusarium Crown Rot Resistance in Wheat.

Fusarium crown rot (FCR) is one of the most important diseases of wheat (Triticum aestivum L.). FCR is mainly caused by the fungal pathogens Fusarium culmorum and F.

Genome-Wide Association Study for Multiple Biotic Stress Resistance in Synthetic Hexaploid Wheat.

Genetic resistance against biotic stress is a major goal in many wheat breeding programs. However, modern wheat cultivars have a limited genetic variation for disease and pest resistance and there is always a possibility of the evolution of new diseases and pests to overcome previously identified resistance genes. A total of 125 synthetic hexaploid wheats (SHWs; 2 = 6 = 42, AABBDD, L.

Identification of Novel Quantitative Trait Loci Linked to Crown Rot Resistance in Spring Wheat.

Crown rot (CR), caused by various species, is a major disease in many cereal-growing regions worldwide. is one of the most important species, which can cause significant yield losses in wheat. A set of 126 advanced International Maize and Wheat Improvement Center (CIMMYT) spring bread wheat lines were phenotyped against CR for field crown, greenhouse crown and stem, and growth room crown resistance scores.

Association analysis of resistance to cereal cyst nematodes () and root lesion nematodes ( and ) in CIMMYT advanced spring wheat lines for semi-arid conditions.

To identify loci linked to nematode resistance genes, a total of 126 of CIMMYT advanced spring wheat lines adapted to semi-arid conditions were screened for resistance to , , and , of which 107 lines were genotyped with 1,310 DArT. Association of DArT markers with nematode response was analyzed using the general linear model. Results showed that 11 markers were associated with resistance to (pathotype Ha21), 25 markers with resistance to , and 9 significant markers were identified to be linked with resistance to .

Genome-Wide Association Study in Wheat Identifies Resistance to the Cereal Cyst Nematode Heterodera filipjevi.

The cyst nematode Heterodera filipjevi is a plant parasite causing substantial yield loss in wheat. Resistant cultivars are the preferred method of controlling cyst nematodes. Association mapping is a powerful approach to detect associations between phenotypic variation and genetic polymorphisms; in this way favorable traits such as resistance to pathogens can be located.