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1.	Lafon-Placette, Clément, et al. (author) Endosperm-based postzygotic hybridization barriers: developmental mechanisms and evolutionary drivers 2016 In: Molecular Ecology. - : Wiley. - 0962-1083 .- 1365-294X. ; 25, s. 2620-2629 Journal article (peer-reviewed)abstract 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 phenomenon that is frequently observed upon hybridization of related plant species or species that differ in ploidy. Endosperm-based interspecies or interploidy hybridization barriers depend on the direction of the hybridization, causing nonreciprocal seed defects. This reveals that the parental genomes are not equivalent, implicating parent-of-origin specific genes generating this type of hybridization barrier. Recent work revealed that endosperm-based hybridization barriers are rapidly evolving. In this review, we discuss the developmental mechanisms causing hybrid seed lethality in angiosperms as well as the evolutionary forces establishing endosperm-based postzygotic hybridization barriers.

Lafon-Placette, Clément, et al. (author)
Endosperm-based postzygotic hybridization barriers: developmental mechanisms and evolutionary drivers
2016
In: Molecular Ecology. - : Wiley. - 0962-1083 .- 1365-294X. ; 25, s. 2620-2629
Journal article (peer-reviewed)abstract
- 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 phenomenon that is frequently observed upon hybridization of related plant species or species that differ in ploidy. Endosperm-based interspecies or interploidy hybridization barriers depend on the direction of the hybridization, causing nonreciprocal seed defects. This reveals that the parental genomes are not equivalent, implicating parent-of-origin specific genes generating this type of hybridization barrier. Recent work revealed that endosperm-based hybridization barriers are rapidly evolving. In this review, we discuss the developmental mechanisms causing hybrid seed lethality in angiosperms as well as the evolutionary forces establishing endosperm-based postzygotic hybridization barriers.

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