Chromosome Pairing in Hybrid Progeny between Triticum aestivum and Elytrigia elongata.

ABSTRACT: In this study, the intergeneric hybrids F₁, F₂, BC₁F₁, BC₁F₂, and BC₂F₁ from Elytrigia elongata and Triticum aestivum crosses were produced to study their chromosome pairing behavior. The average E. elongata chromosome configuration of the two F₁ hybrids agreed with the theoretical chromosome configuration of 21I+7II, indicating that the genomic constitution of this F₁ hybrid was ABDStStE^eE^bE^x. Compared with the BC₁F₁ generation, the BC₂F₁ generation showed a rapid decrease in the number of E. elongata chromosomes and the BC₁F₂ generation showed a more extensive distribution of E. elongata chromosomes. In addition, pairing between wheat and E. elongata chromosomes was detected in each of the wheat-E. elongata hybrid progenies, albeit rarely. Our results demonstrated that genomic in situ hybridization (GISH) using an E. elongata genomic DNA probe offers a reliable approach for characterizing chromosome pairing in wheat and E. elongata hybrid progenies.

SUBMITTER: He F 

PROVIDER: S-EPMC5742266 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature