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INFLUENCE OF CROSS-POLLINATION ON THE DEVELOPMENT OF PARTHENOCARPIC OLIVE (OLEA EUROPAEA) FRUITS (SHOTBERRIES)

Published online by Cambridge University Press:  09 October 2009

GEORGIOS C. KOUBOURIS ,
IOANNIS T. METZIDAKIS  and
MILTIADIS D. VASILAKAKIS
GEORGIOS C. KOUBOURIS*
Affiliation:
Olive Cultivation and Post Harvest Physiology Laboratory, Institute of Olive Tree and Subtropical Plants of Chania, National Agricultural Research Foundation, Agrokipio, 73100 Chania, Greece Pomology Laboratory, School of Agriculture, Aristotle University of Thessaloniki 541 24, Thessaloniki, Greece
IOANNIS T. METZIDAKIS
Affiliation:
Olive Cultivation and Post Harvest Physiology Laboratory, Institute of Olive Tree and Subtropical Plants of Chania, National Agricultural Research Foundation, Agrokipio, 73100 Chania, Greece
MILTIADIS D. VASILAKAKIS
Affiliation:
Pomology Laboratory, School of Agriculture, Aristotle University of Thessaloniki 541 24, Thessaloniki, Greece
*
§Corresponding author: koubourisg@gmail.com
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Summary

The impact of three different pollination treatments (self-, cross-, free-) on the degree of shotberry (seedless fruit) formation of the olive tree cultivars (cvs) Koroneiki, Kalamata, Mastoidis and Amigdalolia was studied for three consecutive years. Controlled crosses were made for the cross-pollination treatments, while for the free pollination treatment flowers were allowed to receive pollen from more than 40 cultivars present in the field. Significant differences were recorded between treatments, cultivars and years. The lowest degree of shotberry formation was observed in free-pollinated trees while the highest was in self-pollinated trees of all cultivars. Low air temperature incidents during the flowering period increased shotberry formation. Cultivars Koroneiki and Mastoidis were reciprocally the most effective pollinator varieties in reducing shotberries. Cultivar Koroneiki could be considered as the most suitable pollinator to reduce shotberries in Kalamata. When cv. Amigdalolia was cross-pollinated by cvs Koroneiki and Mastoidis the degree of shotberry formation was lower when compared to cross-pollination by cv. Kalamata.

Type
Research Article
Information
Experimental Agriculture , Volume 46 , Issue 1 , January 2010 , pp. 67 - 76
Copyright
Copyright © Cambridge University Press 2009

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