The Significance of Polyploidy in Plant Evolution

  title={The Significance of Polyploidy in Plant Evolution},
  author={G. Stebbins},
  journal={The American Naturalist},
  pages={54 - 66}
  • G. Stebbins
  • Published 1940
  • Biology
  • The American Naturalist
Cytogeography of the Humifusa clade of Opuntia s.s. Mill. 1754 (Cactaceae, Opuntioideae, Opuntieae): correlations with pleistocene refugia and morphological traits in a polyploid complex
The results not only provide evidence for the polyphyletic nature of Opuntia humifusa andOpuntia macrorhiza, suggesting that each represents more than one species, but also demonstrate the high frequency of polyploidy in the Humifusa clade and the major role that genome duplication has played in the diversification of this lineage of opuntia s.l. Expand
Reproductive isolation between diploid and tetraploid cytotypes of Libidibiaferrea (= Caesalpinia ferrea) (Leguminosae): ecological and taxonomic implications
The reproductive biology of Libidibia ferrea is analysed to verify the degree of reproductive isolation between the two cytotypes, and data is discussed in relation to the establishment of polyploids, to the pattern of distribution of the species and to the taxonomic implications. Expand
The role of hybridization in plant speciation.
The time is therefore right for a review of the role of hybridization in plant speciation, demonstrating that perhaps all angiosperms have likely undergone at least one round of polyploidization and that hybridization has been an important force in generating angiosperm species diversity. Expand
Systematics and evolution of Tarasa Philippi (Malvaceae): an enigmatic Andean polyploid genus
The ITS phylogeny indicates that the informal tribal alliances and several genera are not monophyletic and this work represents the first exhaustive study to evaluate the infratribal circumscription and generic affinities using molecular sequence data. Expand
Global patterns of subgenome evolution in organelle-targeted genes of six allotetraploid angiosperms
Combining the evolutionary patterns of >340,000 genes from 23 species to test whether whole genome duplications are associated with genetic mismatches between the nuclear, mitochondrial, and chloroplast genomes found evidence that allopolyploid subgenomes exhibit unequal rates of protein-sequence evolution, but there is no global effects of cytonuclear incompatibilities on paternal homoeologs of organelle-targeted genes. Expand
Genetic relationships and polyploid origins in the Lippia alba complex.
This framework reveals linkages among the ploidal levels, providing new insights into the evolution of a polyploid complex of tropical plants. Expand
Genomics of Evolutionary Novelty in Hybrids and Polyploids
This work focuses on the types of molecular genetic and genomic processes that might be set in motion by the saltational event of genome merger between two diverged species, either with or without genome doubling, and how these various processes can contribute to novel phenotypes. Expand
Help or hindrance? The evolutionary impact of whole‐genome duplication on immunogenetic diversity and parasite load
Compared parasite counts and the diversity of the immune‐related toll‐like receptors (TLR) in two coexisting species of Corydoras catfish are compared to provide insight into how WGD may impact evolution, in this case by providing greater immunogenetic diversity. Expand
Speciation and Reticulation in the Polystichum Allotetraploids of the Costa Rican Cordillera Talamanca
Abstract. Polyploidy is a prominent force in the evolution of plant genomes, and the ferns are no exception. The genus Polystichum is particularly rich in polyploids, with 44% of the genus estimatedExpand


Recent Advances in Cytology
AbstractTHE first edition of this book, published in 1932, contained much useful data in the form of tables, diagrams and photographs, together with theories regarding chromosome behaviour. NoExpand
  • 1935