Genetic and morphological characterization of the endangered Austral papaya Vasconcellea chilensis (Planch. ex A. DC.) Solms

The Austral papaya (Vasconcellea chilensis) is an endangered species that has valuable characteristics for introgression into other papaya species. These characteristics include disease resistance, cold tolerance and latex with low proteolytic activity. It is a species that grows under extreme envir...

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Bibliographic Details
Published in:Genetic resources and crop evolution 2014-10, Vol.61 (7), p.1423-1432
Main Authors: Carrasco, B, García-Gonzáles, R, Díaz, C, Ávila, P, Cáceres, P, Lobos, G. A, Silva, H, Caligari, P. D. S
Format: Article
Language:English
Subjects:
Agriculture
Biomedical and Life Sciences
Cold tolerance
Disease resistance
Drought
Endangered & extinct species
Endangered species
Environmental conditions
environmental factors
Fragmentation
Genetic diversity
genetic markers
genetic variation
Immunological tolerance
introgression
Latex
Life Sciences
Low temperature resistance
microsatellite repeats
Morphology
Notes on Neglected and Underutilized Crops
Plant Genetics and Genomics
plant morphology
Plant Physiology
Plant Sciences
Plant Systematics/Taxonomy/Biogeography
Populations
Proteolysis
salinity
temperature
Vasconcellea
Wildlife conservation
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Summary:The Austral papaya (Vasconcellea chilensis) is an endangered species that has valuable characteristics for introgression into other papaya species. These characteristics include disease resistance, cold tolerance and latex with low proteolytic activity. It is a species that grows under extreme environmental conditions of drought, salinity and temperature; it is found growing naturally in Chile but today only as three remnant populations. The results presented here, using inter simple sequence repeat molecular markers, along with morphological trait analyses, suggest that these relict populations are the result of a relatively recent fragmentation. This implies that the fragmentation has not yet had its full effect on the genetic variation and so emphasises the need for clear and urgent conservation measures to preserve the remaining genetic variation, particularly for the most northern of the three populations which is presently unprotected.
ISSN:0925-9864
1573-5109
DOI:10.1007/s10722-014-0143-0