Dog-roses have some special genetic tricks to cope with odd-ploidy.
Tag - chromosome evolution
Alex Assiry
Divergent evolution of the chalcone synthase gene family in Phalaenopsis orchids
The evolutionary success of orchid family is driven by its extraordinary adaptation. Chalcone synthase (CHS) gene encodes the key enzyme for biosynthesis of flavonoids, secondary metabolites important for plant...
Remarkable variation of ribosomal DNA organization and copy number in gnetophytes, a distinct lineage of gymnosperms
Gnetophytes, comprising the genera Ephedra, Gnetum and Welwitschia, are an understudied, enigmatic lineage of gymnosperms with a controversial phylogenetic relationship to other seed plants. Wang et al. examined the...
Directional gene conversion and homogenization of rDNA shapes evolution in Brassica
Brassica napus (AACC, oilseed rape) is an allotetraploid species derived from the putative progenitor diploid species B.rapa (AA) and B. oleracea (CC). To assess the influence of intensive breeding conditions on the...
botanyone
Combining FISH and chromosome modelling in Typhonium
Sousa et al. combine cytogenetics, using fluorescent in situ hybridization (FISH), and modelling of changing chromosome numbers in a maximum-likelihood framework to study Typhonium, a genus of Araceae with 2n = 24 and...
Maximum likelihood inference of chromosome numbers
Botanists interested in changes in chromosome number have often relied on inferring a basic number, x, but this has been done without consistent (reproducible) reference to species’ relationships and frequencies of...
