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Patterns of gene duplication in the plant SKP1 gene family in angiosperms: evidence for multiple mechanisms of rapid gene birth.
This study shows that plant SKP1 genes have evolved by multiple duplication events from a single ancestral copy in the most recent common ancestor (MRCA) of eudicots and monocots, and proposes that two and three ancient retroposition events occurred in lineages leading to Arabidopsis and rice, followed by repeated tandem duplications and chromosome rearrangements.
The Mostly Male Theory of Flower Evolutionary Origins: from Genes to Fossils
The authors' data from the homeotic gene Floricaula/LEAFY imply that the lineage leading to flowering plants originally had two copies of this gene, but that one copy was lost in flowering plants, which suggests a new theory: that developmental control of flower organization derives more from systems active in the male reproductive structures of the gymnosperm ancestor, rather than from the female, with ovules being ectopic in the original flower.
The Search for Flower Homeotic Gene Homologs in Basal Angiosperms and Gnetales: A Potential New Source of Data on the Evolutionary Origin of Flowers
Sequences of the first genes cloned from these libraries demonstrate that a paralogous duplication of LEAFY predated the divergence of Coniferales and Gnetales, and may help resolve the base of the flowering plant tree.
An evolutionary scenario for the origin of flowers
The Mostly Male theory is the first to use evidence from gene phylogenies, genetics, modern plant morphology and fossils to explain the evolutionary origin of flowers. It proposes that flower
Characterization of C₃--C₄ intermediate species in the genus Heliotropium L. (Boraginaceae): anatomy, ultrastructure and enzyme activity.
Heliotropium has numerous C₃ species expressing proto-Kranz traits that could represent a critical initial phase in the evolutionary origin of C ₃--C₄ photosynthesis, and represents an important new model for studying C⁄ evolution.
After a dozen years of progress the origin of angiosperms is still a great mystery
The ‘anthophyte theory’, the dominant concept of the 1980s and 1990s, has been eclipsed; Gnetales, previously thought to be closest to the angiosperms, are related instead to other extant gymnos perms, probably most closely to conifers.
Floral gene resources from basal angiosperms for comparative genomics research
Initial comparisons illustrate the utility of the EST data sets toward discovery of the basic floral transcriptome and address a number of conspicuous evolutionary genomic questions, including reproductive organ transcriptome overlap between angiosperms and gymnosperms, genome-wide duplication history, lineage-specific gene duplication and functional divergence, and analyses of adaptive molecular evolution.
'Living stones' reveal alternative petal identity programs within the core eudicots.
Evidence for petal development that is independent of B-class genes is provided and it is suggested that different genetic control of petal identity has evolved within this lineage of core eudicots.