Biosystematic Studies on the Status of Lycopersicon chilense

Rick, Charles M.; Lamm, Robert

doi:10.2307/2485327

Cited by 34 publications

(38 citation statements)

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“…This race is likewise anomalous in morphology, being the only known coastal form with a dense covering of long epidermal trichomes, compact habit, and highly divided leaves. Also noteworthy is the compatibility of this race with L. chilense in contrast to most forms of L. peruvianum (Rick and Lamm, 1955). Although the phylogenetic significance of the exceptional behavior of LA107 and 108 is not clear at present, it is tempting to hypothesize, on the basis of their intriguing compatibility with such diverse forms, that they might represent or approximate an ancestral common denominator of L. peruvianum and possibly other tomato species.…”

Section: Discussionmentioning

confidence: 96%

“…Systematic considerations. -Rick and Lamm (1955) briefly considered the taxonomic position of var. humifusum and concluded that it might deserve specific status because LAl24-the only bridging accession known at that time-s-was too far re-germinated in the range of controls, which averaged 61'70.…”

Section: Discussionmentioning

confidence: 99%

“…humijusum in its present rank is justified. Another problem in the peruvianum complex briefly treated by Rick and Lamm (1955) was the status of L. glandulosum Mull. (Muller, 1940), to the description of which LA93, 119, and 366 conform.…”

Section: Discussionmentioning

confidence: 99%

“…humifusum is a clearly defined and discrete entity, Muller was aware that the concept of var. dentatum is nebulous, including, on one hand, variants that exist in the same populations with the typical form of the species, and, on the other, forms that have been recognized as L. chilense on the grounds of geographic distribution, morphology, and cross-incompatibility with L. peruvianum (Rick and Lamm, 1955). The latter writers encountered a similar barrier between var.…”

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confidence: 98%

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Barriers to Interbreeding in Lycopersicon peruvianum

Rick¹

1963

Evolution

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Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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confidence: 98%

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Barriers to Interbreeding in Lycopersicon peruvianum

Rick¹

1963

Evolution

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“…Städler et al (2008) was of a similar opinion, justifying the treatment of all their samples as S. peruvianum, noting a lack of either molecular data or crossing results that would validate the proposed split of S. corneliomulleri from S. peruvianum s.str. In fact, Rick and Lamm (1955) and Rick (1963) showed that Lycopersicon glandulosum Müller (now classified as S. corneliomulleri by the TGRC) could cross with S. peruvianum and proposed that not to recognize it as a distinct species. Moreover, Rick (1963) pointed out that if L. glandulosum were recognized as distinct, then at least five other species should be defined.…”

Section: Specific Classificationmentioning

confidence: 99%

Classification and phylogenetic relationships in Solanum section Lycopersicon based on AFLP and two nuclear gene sequences

Zuriaga

Blanca

Nuez

2008

Genet Resour Crop Evol

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The classification and phylogeny of the species belonging to Solanum section Lycopersicon is a complex issue that has not yet reached a widely accepted consensus. These species diverged recently, are still closely related and, in some cases, are still even capable of interspecific hybridization, thereby blurring the difference between intra-and interspecific variation. To help resolve these issues, in the present study, several accessions covering the natural range for each species were used. In addition, to avoid biases due to the molecular method employed, both AFLP markers and two nuclear-gene sequences, CT179 and CT66, were used to characterize the plant materials. The data obtained suggest a classification similar to those previously proposed by other authors, although with some significant changes. Twelve species were recognized as distinct based on this dataset. According to the data presented, the recently proposed species, S. corneliomulleri, is indistinguishable from S. peruvianum s.str. In addition, both the sequence and the AFLP trees suggest that S. arcanum could represent a complex of populations composed of two cryptic species. With regard to phylogenetic relationships among these species, some clear groups were found: the Lycopersicon group formed by S. pimpinellifolium, S. lycopersicum, S. cheesmaniae and S. galapagense; the Arcanum group constituted by S. chmielewskii, S. neorickii, S. arcanum and S. huaylasense; and the Eriopersicon group made up of S. peruvianum and S. chilense. Solanum pennellii and S. habrochaites are not included in any group, but are the closest to the S. lycopersicoides outgroup.

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Biosystematic studies on the status of Solanum chilense

Raduski

Igić

2021

American J of Botany

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Common taxonomic practices, which condition species' descriptions on diagnostic morphological traits, may systematically lump outcrossing species and unduly split selfing species. Specifically, higher effective population sizes and genetic diversity of obligate outcrossers are expected to result less reliable phenotypic diagnoses. Wild tomatoes, members of Solanum sect. Lycopersicum, are commonly used as a source of exotic germplasm for improvement of the cultivated tomato, and are increasingly employed in basic research. Although the section experienced significant early work, which continues presently, the taxonomic status of many wild species has undergone a number of significant revisions and remains uncertain. Species in this section vary in their breeding systems, notably the expression of self-incompatibility, which determines individual propensity for outcrossing METHODS: Here, we examine the taxonomic status of obligately outcrossing Chilean wild tomato (Solanum chilense) using reduced-representation sequencing (RAD-seq), a range of phylogenetic and population genetic analyses, as well as analyses of crossing and morphological data. RESULTS: Overall, each of our analyses provides a considerable weight of evidence that the Pacific coastal populations and Andean inland populations of the currently described Solanum chilense represent separately evolving populations, and conceal at least one undescribed cryptic species. CONCLUSIONS: Despite its vast economic importance, Solanum sect. Lycopersicon still exhibits considerable taxonomic instability. A pattern of under-recognition of outcrossing species may be common, not only in tomatoes, but across flowering plants. We discuss the possible causes and implications of this observation, with a focus on macroevolutionary inference.

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Biosystematic Studies on the Status of Lycopersicon chilense

Cited by 34 publications

References 0 publications

Barriers to Interbreeding in Lycopersicon peruvianum

Barriers to Interbreeding in Lycopersicon peruvianum

Classification and phylogenetic relationships in Solanum section Lycopersicon based on AFLP and two nuclear gene sequences

Biosystematic studies on the status of Solanum chilense

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