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Monday, March 30, 2020
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Tag: apomixis

The morphometrics of autopolyploidy: insignificant differentiation among sexual–apomictic cytotypes

Polyploidization of the plant genome affects the phenotype of individuals including their morphology. In autopolyploids, we expect mainly nucleotypic effects, from a number of...

Sexuality and apomixis in Hieracium are tightly associated with ploidy

Asexual reproduction via seeds (apomixis) is an important speciation mechanism in angiosperms, but its frequency is largely unknown. Mráz and Zdvořák used flow cytometric...

Establishing the cell biology of apomixis in Boechera

The genus Boechera (Brassicaceae) is comprised of both sexual and apomictic species, permitting comparative analyses of meiotic disturbances and parthenogenesis. Hybridization, polyploidy and environmental...

Can a cold snap put a stop to sex?

The alpine plant Ranunculus kuepferi can face spring frosts while growing reproductive organs. Does the cold explain why sometimes the plant doesn't bother with sex?

Intraspecific trait variation provides ecological opportunity for polyploids

One of the features of some plants is they can be polyploid. Humans have a pair of chromosomes carrying our genetic information. Plants can...

Hypericum hybrids trapped in their polyploid gene pool

The underlying genetic causes of the switch to apomixes are not yet fully understood, but in Hypericum there is good evidence for the existence of ‘apomictic factors’.

The evolutionary processes of apomictic brambles

Asexual reproduction is relatively common in higher plants and comprises vegetative reproduction or clonal reproduction through seeds (apomixis or agamospermy). Apomixis is found in...

Origin and genetic differentiation of pink-flowered Sorbus hybrids

Allopolyploidy combined with apomixis is a partnership that generates novel species in many plant taxa, including the genus Sorbus. Uhrinová et al. use chloroplast...

Genetic makeup of autonomous endosperm in Hieracium

Apomixis (asexual seed formation) generates clonal plants with a maternal genotype. Apomictic Hieracium subgenus Pilosella species mitotically form female gametes, with the seed’s embryo...

Contrasting evolutionary patterns and historical hybridization of Anthosachne

Polyploidization and apomixis contribute to taxonomic complexity in Anthosachne, a perennial genus native to Australia in the wheat tribe. Sha et al. performed a...

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Habitat partitioning through reproductive interference in Geranium

We’re familiar with seeing insects flit from one flower to the next, carrying pollen as they do so. What happens when they...

Improving overyielding in legume-based mixtures

A major challenge when supporting the development of intercropping systems remains the design of efficient species mixtures. The ecological processes that sustain...

The Oaks of the North Are Unexpectedly Well-Defended

Normally you would expect plant defences to increase, the closer you get to the equator. This is where insect life is more...
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