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- W1969532015 abstract "The relative importance of convergence and parallelism in the independent evolution of similar traits remains an important question in evolutionary biology. Floral zygomorphy has evolved multiple times independently in different plant lineages through alterations in size, shape and/or number of spatially defined organs. In Antirrhinum majus (snapdragon) floral zygomorphy is controlled by CYCLOIDEA and DICHOTOMA, two recently duplicated TCP transcription factors that determine dorsal identity through their interaction with MYB and cell-cycle genes. Early on it was speculated that independent evolutionary transitions from floral actinomorphy to zygomorphy would probably result from unique developmental genetic mechanisms. Here, we review recent evidence supporting the parallel recruitment of CYCLOIDEA homologs in independent evolutionary transitions to zygomorphy in distantly related core eudicot lineages. The relative importance of convergence and parallelism in the independent evolution of similar traits remains an important question in evolutionary biology. Floral zygomorphy has evolved multiple times independently in different plant lineages through alterations in size, shape and/or number of spatially defined organs. In Antirrhinum majus (snapdragon) floral zygomorphy is controlled by CYCLOIDEA and DICHOTOMA, two recently duplicated TCP transcription factors that determine dorsal identity through their interaction with MYB and cell-cycle genes. Early on it was speculated that independent evolutionary transitions from floral actinomorphy to zygomorphy would probably result from unique developmental genetic mechanisms. Here, we review recent evidence supporting the parallel recruitment of CYCLOIDEA homologs in independent evolutionary transitions to zygomorphy in distantly related core eudicot lineages. farthest or facing away from the main axis, also known as ventral in plants. having more than one plane of mirror-image symmetry, also known as polysymmetric or radially symmetrical. closest to or facing the main axis, also known as dorsal in plants. genes that determine the identity of petal (or petal equivalent) and stamen whorl floral organs in combination with A class (petal) and C class (stamen) genes according to the ABC model of floral development. the independent evolution of similar (nonhomologous, homoplasious) traits in different evolutionary lineages, derived from different ancestral features or developmental pathways. that which extends from the dorsal (adaxial) to the ventral (abaxial) surface. an advantageous evolutionary change that enables rapid speciation within a clade relative to its outgroups. pertaining to a single common ancestor and all its descendants. the independent evolution of similar (nonhomologous, homoplasious) traits in related evolutionary lineages, derived from similar ancestral features or developmental pathways. the effect of a single gene on multiple phenotypic traits. that which extends from the proximal (closest to the point of origin) to the distal (farthest to the point of origin) region. refers to the founding members of the gene family: maize (Zea mays) TB1, snapdragon (Antirrhinum majus) CYC and rice (Oryza sativa) PCF1 and PCF2. perianth organs of angiosperm flowers outside the core eudicots. having a single plane of mirror-image symmetry, also known as monosymmetric or bilaterally symmetrical." @default.
- W1969532015 created "2016-06-24" @default.
- W1969532015 creator A5062917746 @default.
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- W1969532015 date "2009-03-01" @default.
- W1969532015 modified "2023-09-26" @default.
- W1969532015 title "Developmental genetics of floral symmetry evolution" @default.
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- W1969532015 doi "https://doi.org/10.1016/j.tplants.2008.12.005" @default.
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