Exploiting the <i>ZIP4</i> homologue within the wheat <i>Ph1</i> locus has identified two lines exhibiting homoeologous crossover in wheat-wild relative hybrids.

ABSTRACT: Despite possessing related ancestral genomes, hexaploid wheat behaves as a diploid during meiosis. The wheat Ph1 locus promotes accurate synapsis and crossover of homologous chromosomes. Interspecific hybrids between wheat and wild relatives are exploited by breeders to introgress important traits from wild relatives into wheat, although in hybrids between hexaploid wheat and wild relatives, which possess only homoeologues, crossovers do not take place during meiosis at metaphase I. However, in hybrids between Ph1 deletion mutants and wild relatives, crossovers do take place. A single Ph1 deletion (ph1b) mutant has been exploited for the last 40 years for this activity. We show here that chemically induced mutant lines, selected for a mutation in TaZIP4-B2

SUBMITTER: Rey MD 

PROVIDER: S-EPMC5515957 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature