Realisation of New Variability by Means of Inbreeding in Some Indigenous Red Grapevine Cultivar of Verona (North East Italy)
Articolo
Data di Pubblicazione:
2003
Citazione:
Realisation of New Variability by Means of Inbreeding in Some Indigenous Red Grapevine Cultivar of Verona (North East Italy) / G. Tamai, L. Brancadoro, O. Failla, A. Spinardi, A. Scienza. - In: ACTA HORTICULTURAE. - ISSN 0567-7572. - 603:(2003), pp. 345-356.
Abstract:
Corvina, Corvinone and Rondinella, the three main grape varieties cultivated
in Verona, are characterized by a high phenotypic homogeneity. Self-pollination has
been used to give expression to the intrinsic variability present in the genome of
these varieties. The experimental vineyard located in Verona shelters, besides the
seedlings of each variety, some cuttings obtained from the seedlings mother plants.
The genotypes under examination are 357 for Corvina, 341 for Rondinella and 294
for Corvinone. 30 O.I.V. descriptors, phillometry, anthocyanin profile and AFLP
were used to characterize each genotype.
Frequency distribution of mother plants and seedlings populations were
compared and results show that increase of variability was achieved. The genetic
basis of the normal distribution curve of the three inbred populations is always
larger than that one of the cuttings. Recombination of the characters brings to
genotypes extremely different from the mother plants but always in a very low
number. As a matter of fact, most of the seedlings are similar among themselves and
do not discriminate from the mother plants using ampelographical methods. Only
AFLP analysis shows differences between some seedlings and mother plants. Results
confirm the hypothesis of policlonal origin of some cultivars as suggested by Rives
(1961). Self-pollination opens up interesting prospects for the genetical improvement
of grapevine.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
self-pollination ; ampelography ; variability
Elenco autori:
G. Tamai, L. Brancadoro, O. Failla, A. Spinardi, A. Scienza
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