Document Type : Research Paper

Authors

1 Corresponding Author, Citrus and Subtropical Fruits Research Center, Horticulture Science Research Institute, Agricultural Research Education and Extension Organization (AREEO), Ramsar, Iran. E-mai: ma.shiri@areeo.ac.ir

2 Citrus and Subtropical Fruits Research Center, Horticulture Science Research Institute, Agricultural Research Education and Extension Organization (AREEO), Ramsar, Iran. E-mail: malek_ghasemi@areeo.ac.ir

Abstract

Objective: The objective of this study is to evaluate the effect of different methods of complementary pollination on the qualitative characteristics of kiwifruit cv. Hayward in order to introduce the most effective and practical complementary pollination method.
Methods: The present study evaluated the effect of different methods of complementary pollination [open pollination, hand pollination from male flowers of the tumor cultivar, spray pollination with pure pollen and spray pollination with impure pollen (collected from the entrance of bees' nests at the time of opening kiwifruit male flowers) on the qualitative characteristics of kiwifruit cv. Hayward in the Citrus and Subtropical Fruits Research Institute (Ramsar city) in 2021 based on the randomized complete block design in three replications.
Results: The results showed that the amount of titratable acids, maturity index, chlorophyll b, carotenoid, total flavonoid and antioxidant activity were not affected by different methods of complementary pollination. Fruits obtained from spray pollination with impure pollen had the highest single tree yield (98.32 kg per tree), hectare yield (40.39 tons per hectare), number of seeds (1038), amount of soluble solids (7.07 °Brix), chlorophyll a (1.71 mg100 g-1 FW), total chlorophyll (3.11 mg100 g-1 FW), vitamin C (60.27 mg100 g-1 FW), and total fruit phenol (79.62 mg100 g-1 FW). Moreover, these fruits were in more favorable conditions regarding sensory and taste evaluations.
Conclusion: Overall, it is possible to recommend complementary pollination according to spray pollination with impure pollen as the most effective and practical method to increase fruit quality for kiwifruit growers.

Keywords

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