Intrinsic postzygotic isolation typically appears as reduced viability or fertility of interspecific
hybrids caused by genetic incompatibilities between diverged parental genomes …

Genomic imprinting is an epigenetic phenomenon leading to parentally biased gene
expression. Throughout the years, extensive efforts have been made to characterize the …

Understanding the processes of population divergence and speciation remains a core
question in evolutionary biology. For nearly a hundred years evolutionary geneticists have …

Although intrinsic postzygotic reproductive barriers can play a fundamental role in
speciation, their underlying evolutionary causes are widely debated. One hypothesis is that …

The evolution of predominant self‐fertilisation frequently coincides with the evolution of a
collection of phenotypes that comprise the 'selfing syndrome', in both plants and animals …

Interspecific hybridization is the process where closely related species mate and produce
offspring with admixed genomes. The genomic revolution has shown that hybridization is …

Endosperm and Imprinting, Inextricably Linked | Plant Physiology | Oxford Academic Skip to
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In plants, de novo DNA methylation is guided by 24-nt short interfering (si) RNAs in a
process called RNA-directed DNA methylation (RdDM). Primarily targeted at transposons …

Hybrid seed failure arising from wide crosses between plant species is a recurring obstacle
in plant breeding, impeding the transfer of desirable traits. This postzygotic reproductive …

The endosperm is a nourishing tissue that serves to support embryo growth. Failure of
endosperm development will ultimately cause embryo arrest and seed lethality, a …