Resistance to and in Winter Wheat is Conferred by Different QTL.

The coexistence of cereal cyst nematode (CCN) species and , often involving multiple pathotypes, is a limiting factor for wheat production in China. Some of the known genes for resistance to CCN are not effective against both nematode species, hence complicating breeding efforts to develop CCN-resistant wheat cultivars. Here, we demonstrate that the CCN resistance in wheat cultivar Madsen to both spp. is controlled by different genetic loci, both of which originated from . A new quantitative trait locus (QTL), , was identified and localized in a 3.77-Mb genomic region on chromosome arm 7DL, which confers resistance to . on chromosome arm 2AS corresponds to CCN resistance gene and confers resistance to . This QTL is a new locus on chromosome arm 7DL and is designated . Three Kompetitive allele-specific PCR markers (BS00150072, BS00021745, and BS00154302) were developed for molecular marker-assisted selection of and locally adapted wheat lines with resistance to both nematode species were developed. on chromosome arm 2AS corresponds to CCN resistance gene and confers resistance to . The identification of different loci underlying resistance to and and the development of adapted resistant entries will facilitate breeding of wheat cultivars that are resistant to these devastating nematodes in China.