conference schedule and program with abstracts - Horticulture ...
conference schedule and program with abstracts - Horticulture ...
conference schedule and program with abstracts - Horticulture ...
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P-36<br />
Looking for genetic polymorphism through clonal variation of Pinot noir<br />
G. Carrier 1* , L. Le Cunff 1 , A. Dereeper 2 , S. Santoni 2 , L. Audeguin 1 , P. This 2 , J-M. Boursiquot 3<br />
1 UMT GenoVigne, IFV-INRA-Montpellier Supagro, Montpellier, France; 2 UMR DIAPC<br />
INRA-Montpellier Supagro, Montpellier, France; 3 UMR Sciences pour l’oenologie INRA-<br />
Montpellier Supagro, Montpellier, France<br />
*Corresponding author: gregory.carrier@supagro.inra.fr<br />
Clonal variation among cultivars of Vitis vinifera L. has been known formany years <strong>and</strong> its use<br />
achieved very significant gains for the wine industry. Nowadays, the basis of clonal phenotypic<br />
variation is barely known: hypothesis of genetic mutations or epigenetic modifications have<br />
nevertheless been considered. The objective of this study is to get a better insight of the genetic<br />
basis of clonal variation to develop a tool for clonal identification <strong>and</strong> selection. The current<br />
scientific context, access at the whole genome sequences of the individual PN40024 derived<br />
from Pinot noir <strong>and</strong> of a heterozygous clone of Pinot noir ENTAV-INRA® 115 <strong>and</strong> the<br />
development of the NGS (new generation sequencing) technologies, allows now exhaustive<br />
studies of the grapevine genome. Towards this aim, we used the 454 GX FLX Titanium<br />
technology on three official clones of Pinot noir ENTAV-INRA® 386, 583 <strong>and</strong> 777, selected for<br />
their different phenotypic traits. We firstly developed a nuclear DNA extraction method to limit<br />
the contamination from cytoplasmic DNA. We then realized one 454 run by clone <strong>and</strong> we<br />
obtained in mean 1 million reads of 350 bases by run. Our data sets from the 454 <strong>and</strong> the contigs<br />
from the whole sequence of Pinot noir ENTAV-INRA® 115 have been aligned on the reference<br />
genome, PN40024 <strong>with</strong> a compilation of different software: Mosaik-assembler, <strong>and</strong><br />
RepeatMasker. Sixty-six percent of the reads obtained from each of the 454 runs have been<br />
aligned at a unique locus. Thanks to NGS technologies, we could compare a large portion of the<br />
genome <strong>with</strong> 3X coverage: i) in mean 8Mb between Pinot noir ENTAV-INRA® 115 <strong>and</strong> <strong>with</strong><br />
each of the three others clones <strong>and</strong> ii) 0.5 Mb between the three clones themselves. The different<br />
sequence data obtained from these clones will be compared to identify the major molecular<br />
events which separate the clones analyzed. Preliminary results showed that SNPs are less<br />
important than insertions/deletions to be polymorphic between clones. We will validate this<br />
polymorphism <strong>and</strong> will develop method to perform identification of the clones.<br />
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