Molecular evidence for naturalness of genera in the tribe Antirrhineae (Scrophulariaceae) and three independent evolutionary lineages from the New World and the Old

Vargas, Pablo; Rosselló, Josep A.; Oyama, Ryan K.; Güemes, Jaime

doi:10.1007/s00606-004-0216-1

Cited by 57 publications

(102 citation statements)

References 51 publications

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“…Sequence analysis indicates that A. charidemi forms a well defined sister-group to other Antirrhinum species (ref. 12 and our unpublished results). The small organ size of A. charidemi is thought to reflect an adaptation to drought: this species lives in the driest place in Europe with an annual rainfall of only 122 mm and a climate of the warm desert type (13).…”

supporting

confidence: 66%

“…With the exception of Antirrhinum siculum, all can be crossed with each other and with cultivated A. majus to give fertile hybrids, allowing analysis of F 2 populations. The close relationship between these species is further supported by available molecular phylogenies (12). Given their close relationship, it is arguable that many of these species represent subspecies or races.…”

mentioning

confidence: 93%

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Evolution through genetically controlled allometry space

Langlade

Feng

Dransfield

et al. 2005

Proc. Natl. Acad. Sci. U.S.A.

139

170

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Understanding evolutionary change requires phenotypic differences between organisms to be placed in a genetic context. However, there are few cases where it has been possible to define an appropriate genotypic space for a range of species. Here we address this problem by defining a genetically controlled space that captures variation in shape and size between closely related species of Antirrhinum. The axes of the space are based on an allometric model of leaves from an F 2 of an interspecific cross between Antirrhinum majus and Antirrhinum charidemi. Three principal components were found to capture most of the genetic variation in shape and size, allowing a three-dimensional allometric space to be defined. The contribution of individual genetic loci was determined from QTL analysis, allowing each locus to be represented as a vector in the allometric space. Leaf shapes and sizes of 18 different Antirrhinum taxa, encompassing a broad range of leaf morphologies, could be accurately represented as clouds within the space. Most taxa overlapped with, or were near to, at least one other species in the space, so that together they defined a largely interconnected domain of viable forms. It is likely that the pattern of evolution within this domain reflects a combination of directional selection and evolutionary tradeoffs within a high dimensional space.leaf ͉ morphometry ͉ QTL analysis ͉ shape variation ͉ species

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supporting

confidence: 66%

mentioning

confidence: 93%

Evolution through genetically controlled allometry space

Langlade

Feng

Dransfield

et al. 2005

Proc. Natl. Acad. Sci. U.S.A.

139

170

View full text Add to dashboard Cite

show abstract

“…One possible explanation is that the full-red color of A. majus flowers was derived from an ancestor with very pale floral pigmentation, and all of the other palely pigmented members of the genus Antirrhinum might carry the same ancestral, low-activity ros allele. Investigation of this possibility would require a robust molecular phylogeny, which is not currently available for the European species, largely because the high degree of sequence similarity among species for the markers investigated to date makes resolution difficult, and also because there are significant levels of gene flow between sympatric populations as a result of the cross-fertility of the species (Oyama and Baum, 2004;Vargas et al, 2004;Mateu-Andres and de Paco, 2005;Venail, 2005). However, such an explanation of why color variation derives from variations in the activity of the MYB genes in the genus Antirrhinum is unlikely to be correct, because each species accession carries at least one distinct Ros allele, as judged by restriction fragment length polymorphisms with several different enzymes (Venail, 2005), and, although palely pigmented, the patterns of anthocyanin production in A.…”

Section: Discussionmentioning

confidence: 99%

A Small Family ofMYB-Regulatory Genes Controls Floral Pigmentation Intensity and Patterning in the GenusAntirrhinum

et al. 2006

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The Rosea1, Rosea2, and Venosa genes encode MYB-related transcription factors active in the flowers of Antirrhinum majus. Analysis of mutant phenotypes shows that these genes control the intensity and pattern of magenta anthocyanin pigmentation in flowers. Despite the structural similarity of these regulatory proteins, they influence the expression of target genes encoding the enzymes of anthocyanin biosynthesis with different specificities. Consequently, they are not equivalent biochemically in their activities. Different species of the genus Antirrhinum, native to Spain and Portugal, show striking differences in their patterns and intensities of floral pigmentation. Differences in anthocyanin pigmentation between at least six species are attributable to variations in the activity of the Rosea and Venosa loci. Set in the context of our understanding of the regulation of anthocyanin production in other genera, the activity of MYB-related genes is probably a primary cause of natural variation in anthocyanin pigmentation in plants.

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“…L. vulgaris belongs to the Antirrhineae tribe, one of eleven currently circumscribed Plantaginaceae tribes (Estes and Small 2008;Ghebrehiwet et al 2000;Tank et al 2006). The Antirrhineae tribe consists of six well-supported clades (Cymbalaria, Anarrhinum, Chaenorhinum, Antirrhinum, Galvezia, and Linaria) (Fernandez-Mazuecos et al 2013;Vargas et al 2004). In North America, members of the monophyletic Linaria clade are limited to fourteen established non-native species, including L. vulgaris, L. dalmatica and L. genistifolia (L.) (USDA, NRCS 2013).…”

Section: Target Plant Systematics and Biological Informationmentioning

confidence: 99%

“…Fernández-Mazuecos et al (2013) suggests however that Nuttallanthus may, pending further investigation, be appropriately circumscribed as a section of Linaria. The tribe Antirrhineae includes 11 native North American genera and 33 native North American species (Vargas et al 2004;USDA, NRCS 2013).…”

Section: Target Plant Systematics and Biological Informationmentioning

confidence: 99%

Biology and host specificity of Rhinusa pilosa, a recommended biological control agent of Linaria vulgaris

et al. 2014

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Linaria vulgaris Mill. (Plantaginaceae), common or yellow toadflax, is a Eurasian short-lived perennial forb invasive throughout temperate North America. Rhinusa pilosa (Gyllenhal) (Coleoptera, Curculionidae) is a univoltine shoot-galling weevil found exclusively on L. vulgaris in Europe. Under no-choice test conditions, 13 non-native Linaria species exposed to R. pilosa were accepted for oviposition and most were found to be suitable, to varying degrees, for gall and larval development.

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Molecular evidence for naturalness of genera in the tribe Antirrhineae (Scrophulariaceae) and three independent evolutionary lineages from the New World and the Old

Cited by 57 publications

References 51 publications

Evolution through genetically controlled allometry space

Evolution through genetically controlled allometry space

A Small Family ofMYB-Regulatory Genes Controls Floral Pigmentation Intensity and Patterning in the GenusAntirrhinum

Biology and host specificity of Rhinusa pilosa, a recommended biological control agent of Linaria vulgaris

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