Molecular Cytogenetic Identification of a Novel Wheat-Thinopyrum ponticum 1J^S (1B) Substitution Line Resistant to Powdery Mildew and Leaf Rust.

ABSTRACT: Thinopyrum ponticum (2n = 10x = 70) is a wild relative of wheat with high tolerance to both biotic and abiotic stresses; it has been wildly used in wheat genetic improvement. A disomic substitution line named SN19647 was derived from a cross between Triticum aestivum and the wheat-Th. ponticum partial amphiploid SNTE20 (2n = 8x = 56). It was evaluated for disease resistance and characterized via sequential fluorescence in situ hybridization (FISH)-genomic in situ hybridization (GISH) and molecular markers. The results showed that SN19647 carried resistance to both powdery mildew and leaf rust. It contained 42 chromosomes with a pair of wheat chromosome 1B replaced by a pair of J^S chromosomes from Th. pontic

SUBMITTER: Li M 

PROVIDER: S-EPMC8519347 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature