Screening diversity and distribution of Copia retrotransposons reveals a specific amplification of BARE1 elements in genomes of the polyploid Hordeum murinum complex.

We explored diversity, distribution and evolutionary dynamics of Ty1-Copia retrotransposons in the genomes of the Hordeum murinum polyploid complex and related taxa. Phylogenetic and fluorescent in situ hybridization (FISH) analyses of reverse transcriptase sequences identified four Copia families in these genomes: the predominant BARE1 (including three groups or subfamilies, A, B and C), and the less represented RIRE1, IKYA and TAR-1. Within the BARE1 family, BARE1-A elements and a subgroup of BARE1-B elements (named B1) have proliferated in the allopolyploid members of the H.

Diversity and evolution of the Hordeum murinum polyploid complex in Algeria.

Population diversity and evolutionary relationships in the Hordeum murinum L. polyploid complex were explored in contrasted bioclimatic conditions from Algeria. A multidisciplinary approach based on morphological, cytogenetic, and molecular data was conducted on a large population sampling.