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Memorias de investigación
Research Publications in journals:
Genetic diversity and relationships in accessions from different cultivar groups and origins in the tree tomato (Solanum betaceum Cav.)
Year:2012
Research Areas
  • Plants and animal biology and ecology,
  • Crop production
Information
Abstract
Abstract Tree tomato (Solanum betaceum) is an Andean small tree cultivated for its juicy fruits. Little information is available on the characterization of genetic resources and breeding of this neglected crop. We have studied the molecular diversity with AFLP markers using 11 combinations of primers of a collection of 25 S. betaceum accessions belonging to four cultivar groups, most of which had been previously morphologically characterized, as well as one accession of the wild relative S. cajanumense.Atotal of 197 AFLP fragments were scored, of which 84 (43 %) were polymorphic. When excluding S. cajanumense from the analysis, the number of polymorphic AFLP fragments was 78 (40 %). Unique AFLP fingerprints were obtained for every accession, but no AFLP fragments specific and universal to any of the four cultivar groups were found. The total genetic diversity (HT) of cultivated accessions was HT = 0.2904, while for cultivar groups it ranged from HT = 0.1846 in the orange group to HT = 0.2498 in the orange pointed group. Genetic differentiation among cultivar groups (GST) was low (GST = 0.2248), which was matched by low values of genetic distance among cultivar groups. The diversity of collections from Ecuador, which we hypothesize is a center of diversity for tree tomato, was similar to that from other origins (HT = 0.2884 and HT = 0.2645, respectively). Cluster and PCoA analyses clearly separated wild S. cajanumense from the cultivated species. However, materials of different cultivar groups and origins were intermingled in both analyses. The Mantel test correlation coefficient of the matrices of morphological and AFLP distances was low (-0.024) and non-significant. Overall, the results show that a wide diversity is present in each of the cultivar groups, indicate that Ecuador may be regarded as a center of accumulation of diversity for this crop, and confirm that AFLP and morphological characterization data are complementary. The results obtained are of value for the conservation of genetic resources and breeding of tree tomato, as an assessment of the genetic diversity and relationships among differen
International
Si
JCR
Si
Title
Euphytica
ISBN
0014-2336
Impact factor JCR
1,554
Impact info
Datos JCR del año 2011
Volume
187
10.1007/s10681-012-0736-7
Journal number
From page
87
To page
97
Month
SIN MES
Ranking
Participants
  • Autor: Pablo Acosta-Quezada (Universidad Técnica Particular de Loja (Ecuador))
  • Autor: Santiago Vilanova (Instituto de Conservacion y Mejora de la Agrodiversidad Valenciana, Universitat Politecnica de Valencia,)
  • Autor: Juan Bautista Martinez Laborde (UPM)
  • Autor: Jaime Prohens (Instituto de Conservacion y Mejora de la Agrodiversidad Valenciana, Universitat Politecnica de Valencia,)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Biodiversidad y conservación de recursos fitogenéticos
  • Departamento: Biología Vegetal
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Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
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