Reexamination of series relationships of Mexican and Central American wild potatoes (Solanum sect. Petota): evidence from chloroplast DNA restriction site variation

Chloroplast DNA restriction analysis has been used to test the series classifications of the Mexican and Central American representatives of Solanum sect. Petota of Rydberg, Bukasov, Hawkes, and Correll. Three clades are supported: 1. all species in series Morelliformia, Pinnatisecta, and Polyadenia...

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Bibliographic Details
Published in:Systematic botany 1992-07, Vol.17 (3), p.432-448
Main Authors: Spooner, D.M. (USDA, ARS, University of Wisconsin, Madison, WI), Sytsma, K.J
Format: Article
Language:English
Subjects:
ADN
AMERICA CENTRAL
AMERIQUE CENTRALE
Biological and medical sciences
Biological taxonomies
Chloroplast DNA
CHLOROPLASTE
CLASIFICACION
CLASSIFICATION
CLOROPLASTO
Diploidy
DISTRIBUCION NATURAL
DISTRIBUTION NATURELLE
EVOLUCION
EVOLUTION
FILOGENIA
Fundamental and applied biological sciences. Psychology
Genetic mutation
Genomes
Hybridity
MEXICO
MEXIQUE
PHYLOGENIE
Plant cytology, morphology, systematics, chorology and evolution
Plants
POLIMORFISMO
POLYMORPHISME
Rydberg series
SOLANUM
Spermatophyta
Systematics (diagnosis, chromosome numbers)
Tetraploidy
VARIACION GENETICA
VARIATION GENETIQUE
VARIEDADES
VARIETE
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Summary:Chloroplast DNA restriction analysis has been used to test the series classifications of the Mexican and Central American representatives of Solanum sect. Petota of Rydberg, Bukasov, Hawkes, and Correll. Three clades are supported: 1. all species in series Morelliformia, Pinnatisecta, and Polyadenia exclusive of S. bulbocastanum and S. cardiophyllum. Subclades within clade 1 include S. trifidum and S. tarnii; S. X michoacanum and S. pinnatisectum; S. brachistotrichum and S. stenophyllidium; S. clarum and S. morelliforme; and series Polyadenia; 2. S. bulbocastanum and S. cardiophyllum; 3. S. verrucosum (a Mexican diploid), the Mexican polyploid species, and the South American species. Within clade 3, series Conicibaccata forms a well-defined subclade, whereas S. verrucosum, series Longipedicellata, series Demissa, and the South American species form another. In reference to the latest classification of Hawkes, series Conicibaccata and Polyadenia are supported as monophyletic; the Mexican diploids are paraphyletic; and series Demissa, Longipedicellata, and S. verrucosum (series Tuberosa) form one monophyletic assemblage. Species within series Longipedicellata and Demissa are polyploid, possibly of hybrid origin, and may need less conservative markers or biparentally-inherited probes to distinguish them. These molecular results are compared to the diverse data sets that have led to this classification
ISSN:0363-6445
1548-2324
DOI:10.2307/2419483