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Species relationships in the genus Vasconcellea (Caricaceae) based on molecular and morphological evidence

(2005) AMERICAN JOURNAL OF BOTANY. 92(6). p.1033-1044
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Abstract
Validity of the taxa currently recognized in the genus Vasconcellea was analyzed by investigating morphological and molecular data from 105 specimens of this genus and six specimens of the related genus Carica. Taxon identification of these specimens was compared with clustering in two phenetic dendrograms generated with 36 morphological characters and 254 amplified fragment length polymorphic (AFLP) markers. Moreover, cytoplasmic haplotypes were assessed using polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP) of one mitochondrial and two chloroplast DNA regions. Results show that the morphological data set, containing mainly vegetative characteristics, merely reveals external resemblance between specimens, which is not directly associated with genetic relationships and taxon validity. Phenotypic plasticity and intercompatibility between several species are likely to confuse morphological delimitation of the taxa. Based on the results of our study, several specimens that could not be identified with the currently used identification key (1) could be attributed to a known taxon, which should be extended to include a higher range of morphological variability or (2) could be hypothesized to be of hybrid origin. Because of the high intraspecific variation within V. microcarpa and V. X heilbornii, revision of these taxa is recommended.
Keywords
Carica, AFLP, hybridization, morphological variability, PCR-RFLP, phenetic relationships, species separation, Vasconcellea, GENETIC-RELATIONSHIPS, PHYLOGENETIC ANALYSIS, WILD RELATIVES, MARKERS, PAPAYA, HYBRIDIZATION, DIVERSITY

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Chicago
Kyndt, Tina, Eliza Romeijn-Peeters, Bart Van Droogenbroeck, José P Romero-Motochi, Godelieve Gheysen, and Paul Goetghebeur. 2005. “Species Relationships in the Genus Vasconcellea (Caricaceae) Based on Molecular and Morphological Evidence.” American Journal of Botany 92 (6): 1033–1044.
APA
Kyndt, T., Romeijn-Peeters, E., Van Droogenbroeck, B., Romero-Motochi, J. P., Gheysen, G., & Goetghebeur, P. (2005). Species relationships in the genus Vasconcellea (Caricaceae) based on molecular and morphological evidence. AMERICAN JOURNAL OF BOTANY, 92(6), 1033–1044.
Vancouver
1.
Kyndt T, Romeijn-Peeters E, Van Droogenbroeck B, Romero-Motochi JP, Gheysen G, Goetghebeur P. Species relationships in the genus Vasconcellea (Caricaceae) based on molecular and morphological evidence. AMERICAN JOURNAL OF BOTANY. 2005;92(6):1033–44.
MLA
Kyndt, Tina, Eliza Romeijn-Peeters, Bart Van Droogenbroeck, et al. “Species Relationships in the Genus Vasconcellea (Caricaceae) Based on Molecular and Morphological Evidence.” AMERICAN JOURNAL OF BOTANY 92.6 (2005): 1033–1044. Print.
@article{316594,
  abstract     = {Validity of the taxa currently recognized in the genus Vasconcellea was analyzed by investigating morphological and molecular data from 105 specimens of this genus and six specimens of the related genus Carica. Taxon identification of these specimens was compared with clustering in two phenetic dendrograms generated with 36 morphological characters and 254 amplified fragment length polymorphic (AFLP) markers. Moreover, cytoplasmic haplotypes were assessed using polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP) of one mitochondrial and two chloroplast DNA regions. Results show that the morphological data set, containing mainly vegetative characteristics, merely reveals external resemblance between specimens, which is not directly associated with genetic relationships and taxon validity. Phenotypic plasticity and intercompatibility between several species are likely to confuse morphological delimitation of the taxa. Based on the results of our study, several specimens that could not be identified with the currently used identification key (1) could be attributed to a known taxon, which should be extended to include a higher range of morphological variability or (2) could be hypothesized to be of hybrid origin. Because of the high intraspecific variation within V. microcarpa and V. X heilbornii, revision of these taxa is recommended.},
  author       = {Kyndt, Tina and Romeijn-Peeters, Eliza and Van Droogenbroeck, Bart and Romero-Motochi, Jos{\'e} P and Gheysen, Godelieve and Goetghebeur, Paul},
  issn         = {0002-9122},
  journal      = {AMERICAN JOURNAL OF BOTANY},
  keyword      = {Carica,AFLP,hybridization,morphological variability,PCR-RFLP,phenetic relationships,species separation,Vasconcellea,GENETIC-RELATIONSHIPS,PHYLOGENETIC ANALYSIS,WILD RELATIVES,MARKERS,PAPAYA,HYBRIDIZATION,DIVERSITY},
  language     = {eng},
  number       = {6},
  pages        = {1033--1044},
  title        = {Species relationships in the genus Vasconcellea (Caricaceae) based on molecular and morphological evidence},
  url          = {http://dx.doi.org/10.3732/ajb.92.6.1033},
  volume       = {92},
  year         = {2005},
}

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