Roy SW. Dual Fertilization, Intragenomic Conflict, Genome Downsizing, and Angiosperm Dominance.
TRENDS IN PLANT SCIENCE 2021;
26:767-769. [PMID:
34108106 DOI:
10.1016/j.tplants.2021.05.003]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 05/11/2021] [Accepted: 05/14/2021] [Indexed: 06/12/2023]
Abstract
New work suggests 'subgenome dominance' in polyploids may only occur in angiosperms. Subgenome dominance could explain angiosperm-specific genome reduction, with potential implications for angiosperms' global dominance. I suggest that evolution of the endosperm could have selected for the evolution of subgenome dominance, due to increased hybrid/polyploid incompatibilities and/or through direct reciprocal suppression of maternally- and paternally-inherited genomes.
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