86,797 research outputs found
A new set of microsatellite markers for Fragaria species and their application in linkage analysis
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New markers for the traceability of organic fruit
No full textThe objective of the present research was to define a traceability system for organic fruits (orange, peach and strawberry) to monitor the classical parameters of quality (carpometric characteristics, total soluble solids (TSS), total acidity (TA), and ascorbic acid). We also aimed to monitor the parameters of several plant metabolites, such as synephrine in orange juice, ellagic acid in strawberries, and phenolic and volatile compounds in peaches, whose biosynthesis could be influenced by the use of an organic or conventional cultivation system. In addition, taking into account several specific aspects of the two cultivation methods, such as the different kinds of nitrogen soil fertilization used, a study was carried out to verify the possibility to differentiate between organically and conventionally grown fruit through the detection of markers linked to nitrogen metabolism. The ratio of stable isotopes of nitrogen 15N/14N in the proteins of pulp (delta15N PP) of different fruit species was determined. Our results showed that the cultivation method did not determine relevant differences in the quality parameters in oranges and peaches, whereas in strawberries, differences between organic and conventional fruits were observed. The ascorbic acid content in the three species studied was always higher in the organic fruits. Moreover, the level of bioactive compounds, such as skin anthocyanins in the ‘Spring Lady’ peach cultivar, was higher in the organically grown fruits. Peaches and oranges from organically managed farms had statistically higher delta15N PP values compared with the conventional ones. Therefore, the application of organic fertilizers, which notoriously increase the level of delta15N in the soil, also leads to an increase of delta15N values in the organic fruit. For that reason, this parameter can be used as a new marker to differentiate organically from conventionally grown fruit. Regarding the delta15N level found in strawberry pulp, no difference was observed between organic and conventional fruits because organic fertilizers are often employed even in conventional systems
New markers for the traceability of organic fruit: a cooperative research project supported with funding by MiPAAF (D.M. 91461/7743 - 06/09/05)
No full textTHE TRANSITING PLANETARY SYSTEM WASP-86/KELT-12: TESS PROVIDES THE CASTING VOTE
No full textA transiting planetary system was discovered independently by two groups, under the names WASP-86 (Faedi et al.1) and KELT12 (Stevens et al.2). The properties of the system determined in these works were very different, most tellingly a variation of a factor of three in the measured radius of the planet. We suggest that the system be named WASP-86 / KELT-12 to better apportion the credit for discovery between the two groups. We analyse the light curve of this system from the Transiting Exoplanet Survey Satellite, which observed it in two sectors, following the Homogeneous Studies approach. We find properties intermediate between the two previous studies: the star has a mass of 1.278 ± 0.039 M? and a radius of 2.02 ± 0.12 R?, and the planet has a mass of 0.833 ± 0.049 MJup and a radius of 1.382 ± 0.089 RJup. The discrepancy in the two previous sets of measured properties of the system arises from a disagreement over the transit depth and duration, caused by the transit being long and shallow so not well suited to follow-up photometry from ground-based telescopes. We also update the orbital ephemeris to aid future work on this system, which is a good candidate for characterising the atmosphere of a planet through transmission spectroscopy
Effects of plant type on two strawberry cultivars in Siciliy
No full textIn Sicily fresh plants have for years been replacing the once popular cold-stored ones. Good early cropping is the aim of all strawberry growers in the island s Marsala district. The present trial tested the response of the new strawberry cultivars Sabrosa and Florida Fortuna using fresh plug and bare-root plants. Florida Fortuna plug-plants turned out to be the most promising type as a cash crop in delivering extra early ripening
INFLUENZA DELL'AMBIENTE DI COLTIVAZIONE SULLA CAPACITA' ANTIOSSIDANTE E CONTENUTO IN POLIFENOLI IN FRAGOLA
No full textEffects of plant type on two strawberry cultivars in Sicily
No full textIn Sicily fresh plants have for years been replacing the once popular cold-stored ones. Good early cropping is the aim of all strawberry growers in the island’s Marsala district. The present trial tested the response of the new strawberry cultivars ‘Sabrosa’ and ‘Florida Fortuna’ using fresh plug and bare-root plants. ‘Florida Fortuna’ plug-plants turned out to be the most promising type as a cash crop in delivering extra early ripening
Strawberry Variety Trial in Sicily.
No full textThe Sicilian strawberry area differs from other Italian strawberry areas for its high
earliness with productions that start in November-December. The earliness due to
the very low plant winter chilling requirement is a very important characteristic to
define the variety adaptability to this environment. Through the "Liste varietali
Fragola" project funded by MiPAAF, many new varieties and advanced selections are
evaluated annually in Sicily. Here, at the moment, the main variety is Florida Fortuna,
followed by Candonga ® Sabrosa and Naiad ® CIVL35. Florida Fortuna, released in
Florida, showed to be very interesting especially for its outstanding earliness, a high
yield and good fruit quality traits, but it is quite susceptible to biotic and abiotic
factors that may affect the survival of plants.
The study was carried out in 2011-'12 at the experimental fields located in Marsala
(TP). The cultural technique adopted was the typical Sicilian one. The performance of
7 new varieties and 4 selections are here described. Three of these selections were
obtained by the Sicilian breeding program - carried out by the S.Ag.A
Department and coordinated by CRA-FRF.
Florida Fortuna confirmed to be the earliest and productive variety. Sabrina, coming
from Spain, provided the firmest fruits with the highest total soluble solid content,
while the Italian Rania produced the biggest fruits. The following selections are at
the final stage of evaluation and they may be released in the near future: PA 260.3
showed to be early and to produce firm and sweet medium-small fruits. PA 20, which
provided the yield as Florida Fortuna, has an early ripening and its fruits are firm
with an high content of total soluble solids. PA 3 and Pir 2 stood out for high
firmness, sweetness and very bright red-orange fruit colour
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