Seed Development in Interploidy Hybrids

R J Scott, Julia Tratt, Ahmed Bolbol

Research output: Chapter in Book/Report/Conference proceedingChapter

5 Citations (Scopus)

Abstract

Hybridization between plants of the same or different species can have dramatic effects on seed size and survival. Postzygotic hybridization barriers may prevent the development of viable seeds or fertile hybrids, and can arise within a single species as a result of polyploidization, resulting in genetic isolation and potentially sympatric speciation. Dramatic growth-related changes in endosperm development, principally cellularization and proliferation, frequently account for seed failure following hybridization between polyploids and their diploid progenitors. Misexpression of key transcription factors controlled by a PcG complex that contains factors subject to genomic imprinting explains this behaviour in Arabidopsis thaliana. Further insights into the origin and nature of postzygotic hybridization barriers are being provided by analysis of the Columbia ecotype of A. thaliana where (2x × 4x) crosses show high-frequency seed abortion. Loss of the flavonoid biosynthesis pathway activity in the integuments strongly mitigates this lethality implying a role for the seed coat in regulating endosperm cellularization.
Original languageEnglish
Title of host publicationPolyploid and Hybrid Genomics
EditorsZ Jeffrey Chen, James A Birchler
Place of PublicationOxford, UK
PublisherWiley
Pages271-290
Number of pages20
ISBN (Electronic)9781118552872
ISBN (Print)9780470960370
DOIs
Publication statusPublished - 4 Apr 2013

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seed development
hybridization
imprinting behavior
endosperm
Arabidopsis thaliana
seeds
seed abortion
sympatric speciation
genomic imprinting
ecotypes
integument
polyploidy
diploidy
flavonoids
transcription factors
biosynthesis

Cite this

Scott, R. J., Tratt, J., & Bolbol, A. (2013). Seed Development in Interploidy Hybrids. In Z. J. Chen, & J. A. Birchler (Eds.), Polyploid and Hybrid Genomics (pp. 271-290). Oxford, UK: Wiley. https://doi.org/10.1002/9781118552872.ch17

Seed Development in Interploidy Hybrids. / Scott, R J; Tratt, Julia; Bolbol, Ahmed.

Polyploid and Hybrid Genomics. ed. / Z Jeffrey Chen; James A Birchler. Oxford, UK : Wiley, 2013. p. 271-290.

Research output: Chapter in Book/Report/Conference proceedingChapter

Scott, RJ, Tratt, J & Bolbol, A 2013, Seed Development in Interploidy Hybrids. in ZJ Chen & JA Birchler (eds), Polyploid and Hybrid Genomics. Wiley, Oxford, UK, pp. 271-290. https://doi.org/10.1002/9781118552872.ch17
Scott RJ, Tratt J, Bolbol A. Seed Development in Interploidy Hybrids. In Chen ZJ, Birchler JA, editors, Polyploid and Hybrid Genomics. Oxford, UK: Wiley. 2013. p. 271-290 https://doi.org/10.1002/9781118552872.ch17
Scott, R J ; Tratt, Julia ; Bolbol, Ahmed. / Seed Development in Interploidy Hybrids. Polyploid and Hybrid Genomics. editor / Z Jeffrey Chen ; James A Birchler. Oxford, UK : Wiley, 2013. pp. 271-290
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