Cytotaxonomic investigations on species of genus (Amaryllidaceae) from Algeria.

This paper provides new cytotaxonomic data on the genus Linnaeus, 1753, in Algeria. Populations of seven taxa, Linnaeus, 1753, Durieu, 1847, Ker Gawler, 1806, (Haworth) Spach, 1846, sensu lato Linnaeus, 1753, including (Haworth) Steudel, 1841, and De Candolle, 1815, were karyologically investigated through chromosome counting and karyotype parameters. and have the same number of chromosomes 2 = 2 = 20 with different karyotype formulas.

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.

Karyological investigations and new chromosome number reports in Bellevalia Lapeyrouse, 1808 and Muscari Miller, 1758 (Asparagaceae) from Algeria.

Karyological investigations were carried out on four species of Bellevalia Lapeyrouse, 1808 and Muscari Miller, 1758 (Asparagaceae) sampled in contrasting bioclimatic conditions of Algeria. The endemic Bellevalia mauritanica Pomel, 1874 was found to have a tetraploid cytotype 2n = 4x = 16 and an octoploid 2n = 8x = 32 which is a new report. The chromosome number 2n = 2x = 18 in Muscari comosum (Linnaeus, 1753) Miller, 1768 and Muscari maritimum Desfontaines, 1798 was in conformity with earlier reports.

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.