Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Identification of introgressed segments conferring disease resistance in a tetrageneric hybrid of Triticum, Secale, Thinopyrum, and Avena.

Abstract

Using genomic in situ hybridization to chromosomes, introgressed segments were identified in a tetrageneric hybrid of Triticum, Avena, Thinopyrum intermedium [Elymus hispidus], and Secale, which conferred resistance to leaf rust (Puccinia recondita), stem rust (P. graminis), stripe rust (P. striiformis), powdery mildew (Erysiphe graminis), and root rot (Alternaria alternata) to wheat. The disease resistance traits of the hybrid originated from three wild related genera of Triticum, namely Avena, Thinopyrum, and Secale. The new breeding system that combined traditional wide hybridization with anther culture was efficient and rapid in creating wheat germplasms resistant to major diseases.