Synonymer & Information om | Engelska ordet APOMIXIS

Exempel på hur man kan använda APOMIXIS i en mening

• The taxonomy of blackberries has historically been confused because of hybridization and apomixis, so that species have often been grouped together and called species aggregates.
• Apomictically produced offspring are genetically identical to the parent plant, except in nonrecurrent apomixis.
• A major source of complexity comes from the occurrence of hybridization, polyploidy, and apomixis (asexual seed production), making species difficult to characterize and identify.
• Since most hawkweeds reproduce exclusively asexually by means of seeds that are genetically identical to their mother plant (apomixis or agamospermy), clones or populations that consist of genetically identical plants are formed and some botanists (especially in UK, Scandinavia and Russia) prefer to accept these clones as good species (arguing that it is impossible to know how these clones are interrelated) whereas others (mainly in Central Europe and USA) try to group them into a few hundred more broadly defined species.
• Certain organisms reproduce asexually via processes such as apomixis, parthenogenesis, autogamy, and cloning.
• The primary mating systems in plants are outcrossing (cross-fertilisation), autogamy (self-fertilisation) and apomixis (asexual reproduction without fertilization, but only when arising by modification of sexual function).
• Root-knot nematodes exhibit a range of reproductive modes, including sexuality (amphimixis), facultative sexuality, meiotic parthenogenesis (automixis) and mitotic parthenogenesis (apomixis).
• The tree is of hybrid origin, between Sorbus torminalis (wild service tree) and a member of the Sorbus aria (whitebeam) group, but it exhibits apomixis and breeds true from seed.
• Ledyard Stebbins in their 1938 monograph The American Species of Crepis: their interrelationships and distribution as affected by polyploidy and apomixis.
• Nucellar embryony is a type of apomixis, where eventually nucellar embryos from the nucellus tissue of the ovule are formed, independent of meiosis and sexual reproduction.
• The plants introduced to North America, originally as a food crop, are triploids that mainly reproduce by obligate gametophytic apomixis Some authorities recognize three subspecies of Taraxacum officinale, including:.
• The work with ferns addressed hybridisation, polyploidy, and apomixis and led to her 1950 book, Problems of cytology and evolution in the pteridophyta.
• The genus contains many species, which usually (or in the case of triploids, obligately) reproduce by apomixis, resulting in many local populations and endemism.
• He moved to study at the Jodrell Laboratory on a Robert Donaldson scholarship in 1895, where he focused on the apomixis of ferns, and discovered a sporangium on the prothallus of a fern at a time when biologists were exploring alternate means of reproduction in plants.
• Agamospermy can occur through many different mechanisms, some of which require pollination (pseudogamy), and some of which do not (autonomous apomixis).
• The plant often reproduces vegetatively via tillers, or via apomixis with unfertilized seeds, and some populations are made up only of female individuals.
• filamentosa (Hydatellaceae): a new subspecies and a hypothesis of apomixis arising within a predominantly selfing lineage.

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