A physical map for the Amborella trichopoda genome sheds light on the evolution of angiosperm genome structure.

ABSTRACT:

Background

Recent phylogenetic analyses have identified Amborella trichopoda, an understory tree species endemic to the forests of New Caledonia, as sister to a clade including all other known flowering plant species. The Amborella genome is a unique reference for understanding the evolution of angiosperm genomes because it can serve as an outgroup to root comparative analyses. A physical map, BAC end sequences and sample shotgun sequences provide a first view of the 870 Mbp Amborella genome.

Results

Analysis of Amborella BAC ends sequenced from each contig suggests that the density of long terminal repeat retrotransposons is negatively correlated with that of protein coding genes. Syntenic, presumably ancestral, gene blocks were identified in comparisons of the Amborella BA

SUBMITTER: Zuccolo A 

PROVIDER: S-EPMC3219971 | biostudies-literature | 2011

REPOSITORIES: biostudies-literature