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Abstract Detail


Population Genetics

Salmaso, Marzia [1], Lucchin, Margherita [1].

Genetic variability and biodiversity conservation of an indigenous grapevine germplasm collection: perspective from nuclear and chloroplast SSR variation.

Grapevine is one the most economically important perennial crop worldwide. The current tendency to plant successful and famous cultivars such as Merlot, Cabernet Sauvignon or Chardonnay, in all the main vine-growing regions of the world should be balanced by the maintenance of the autochthonous varieties in order to prevent genetic erosion in this crop. We set out a germplasm safeguard on 19 indigenous and nearly extinct grapevine varieties cultivated at a limited scale in north-eastern Italy. To evaluate how genetic information can be used to achieve a conservation perspective of these varieties, genetic variability at 20 nuclear and three chloroplast polymorphic microsatellite DNA loci was analyzed. The markers were proved to be informative and the genetic diversity and phylogenetic relationships among the local varieties were estimated. The genetic profiles of all the cultivars were searched for possible parent-offspring relationships and several cases of suspected synonyms have been investigated. The results evidence a number of synonymous and homonymous varieties. In addition, three cases of parent/offspring relationship were found. Our analysis of both nuclear and chloroplast genome polymorphisms showed that indigenous varieties present rare alleles and haplotypes absent in international ones. Our results may be helpful to parent’s selection for breeding programs and identification of duplicates within the gene pool in view of an effective conservation and management of the local germplasm.


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1 - University of Padova, Department of Environmental Agronomy and Crop Production, viale Università 16, Agripolis, Padova, 35020, Italy

Keywords:
Vitis
SSR
Biodiversity
conservation
Chloroplast.

Presentation Type: Poster:Posters for Topics
Session: P
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM
Number: P76003
Abstract ID:857


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