Sexual reproduction is common within Orchidaceae, though apomixis does occur in some genera allowing them to produce seeds that are clones of the mother. The reproductive embryology of mycoheterotrophic plants remains...
Tag - apomixis
botanyone
Sporogenesis and offspring ploidy levels in hybrid Dryopteris ferns
In ferns, apomixis is an important mode of asexual reproduction. Although the mechanisms of fern reproduction have been studied thoroughly, most previous work has focused on cases in which ferns reproduce either...
Phylogeography and reproduction modes in Limonium spp.
The genus Limonium (Plumbaginaceae) has long been recognized to have sexual and apomictic (asexual seed formation) modes of reproduction.
Genome size, ploidy level and reproductive mode of Sorbus
The authors find that the coexistence of apomictic tetraploids and sexual diploids drives the production of novel polyploid cytotypes in S. austriaca.
Genetic linkage maps for apomictic Hieracium species
Shirasawa et al. develop a collection of expressed SSR markers in order to construct linkage maps for Hieracium species.
Variations in apomixis in diploid Paspalum rufum
Under self-pollination induction three genotypes of P. rufum develop seeds from both meiotic and aposporous embryo sacs.
Reproduction and invasiveness in St. John’s wort
Invasiveness is not correlated with the genome variability and reproductive variability that characterize St. John's wort.
AJ Cann
Reproductive differentiation into sexual and apomictic cytotypes
Mechanisms enabling the maintenance of sexual and apomictic modes of seed formation in sympatry are poorly understood. Dobeš et al. study populations of Potentilla puberula representing various combinations of five...
Apomixis in Paspalum (Review)
Ortiz et al.critically review more than half a century of research in Paspalum, a genus that provides an excellent model for studying apomixis in grasses.
Merging gene pools in Hypericum perforatum
Analysis of extensive field collections demonstrates that H. perforatum is not of hybrid origin, and for the first time, documents wild diploid populations.
Plastid and nuclear variation among apomictic polyploids
Apomicts are plants grown from seeds or spores are produced without fertilization.
Evolution and speciation in Sorbus
Interspecific hybridization and polyploidy are key processes in plant evolution and are responsible for ongoing genetic diversification in the genus Sorbus (Rosaceae). Ludwig et al. study mating systems of diploid...
Apomixis and reticulate evolution in Aspleniaceae
Ferns have the highest proportion of apomictic species in all plant groups, but the reasons for this are unclear. Dyer et al. determine the reproductive mode of species in the Asplenium monanthes fern complex, and use...
Apomixis is not prevalent in a high-alpine ecosystem
`Apomixis is not prevalent in a high-alpine ecosystem Apomixis (agamospermy) is expected to provide selective advantages in high alpine environments, where conditions tend to be unfavourable for sexual reproduction of...
