عنوان مجله
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International Journal of Fruit Science
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چکیده
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Quince (Cydonia oblonga Miller.) belongs to the Rosaceae
family and is generally used for fresh consumption and processed
items. In this research, fruit characteristics of eight
quince genotypes from Iran were investigated via genotype
by trait interactions (GTI) biplot. Results indicated that the first
two principal components analysis (PC1 and PC2) were used to
create a two-dimensional GTI biplot that accounted percentages
of 31% and 22%, respectively, of sums of squares of the
GTI. The vertex genotypes in polygon were Svs1, Esf, Nb1, Kud2
and Et1; and Svs1 was the winning genotype for pectin, fruit
length, phosphorus percent and fruit hardness while Esf was
the best genotype for iron percent, fruit diameter, fruit weight
and end hold. There were positive correlation among pectin,
fruit length, fruit hardness and phosphorus percent as well as
among zinc percent, branch length, fruit apparent specific
weight, calcium percent and potassium percent. Genotype
Svs1 was more desirable followed by genotypes Nb4, Esf and
Et1 based on ideal entry biplot and pectin and fruit length
were the best traits according to ideal tester biplot. The best
genotype for obtaining of high fruit weight was Esf following
to Nb4, Svs1 and Nb1 and ranking traits based on fruit weight
showed that fruit diameter is more important followed by end
hold and iron percent. This study showed that there was
relatively high level of variation in quince genotypes grown
and morphological traits used in this research indicating that
they can be used for characterization and diversity analysis of
quince. We concluded from this study that it is imperative for
breeders to pay more attention to improve quince morphological
traits coordinated to fruit yield performance.
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