Martis, M.M., Zhou, R., Haseneyer, G., Schmutzer, T., Vrána, J., Kubaláková, M., König, S., Kugler, K.G., Scholz, U., Hackauf, B., Korzun, V., Schön, C.C., Doležel, J., Bauer, E., Mayer, K.F.X., Stein, N.
PLANT CELL
25:
3685-3698,
2013
Klíčová slova:
Abstrakt:
Rye (Secale cereale) is closely related to wheat (Triticum aestivum) and barley (Hordeum vulgare). Due to its large genome
(;8 Gb) and its regional importance, genome analysis of rye has lagged behind other cereals. Here, we established a virtual
linear gene order model (genome zipper) comprising 22,426 or 72% of the detected set of 31,008 rye genes. This was achieved
by high-throughput transcript mapping, chromosome survey sequencing, and integration of conserved synteny information of
three sequenced model grass genomes (Brachypodium distachyon, rice [Oryza sativa], and sorghum [Sorghum bicolor]). This
enabled a genome-wide high-density comparative analysis of rye/barley/model grass genome synteny. Seventeen conserved
syntenic linkage blocks making up the rye and barley genomes were defined in comparison to model grass genomes. Six
major translocations shaped the modern rye genome in comparison to a putative Triticeae ancestral genome. Strikingly
dissimilar conserved syntenic gene content, gene sequence diversity signatures, and phylogenetic networks were found for
individual rye syntenic blocks. This indicates that introgressive hybridizations (diploid or polyploidy hybrid speciation) and/or
a series of whole-genome or chromosome duplications played a role in rye speciation and genome evolution.
Fulltext: kontaktujte autory z ÚEB
Autoři z ÚEB: Jaroslav Doležel,
Marie Kubaláková,
Jan Vrána
Čeština
English