New Zealand Journal of Crop and Horticultural Science abstracts

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Selection of late leafing, late flowering, laterally fruitful walnut (Juglans regia) types in Turkey

Y. Akca
S. Ozongun

Department of Horticulture
Faculty of Agriculture
University of Gaziosmanpasa
Tokat 60240, Turkey
email: yakca@gop.edu.tr

Abstract  In many areas of Turkey, walnut (Juglans regia) production is limited not only by winter cold but also by autumn and spring frosts that can damage the sensitive non-dormant tissues. This study was conducted to select late leafing and late flowering walnut types with high lateral fruitfulness within a seedling population in 1999–2001. The main objective of the selection programme was to select types that would not suffer injuries from late spring frost. As a result of the expeditionary observations 19 forms were selected, according to characteristics of late leafing, lateral fruitfulness, blight resistance, anthracnose, and codling moth tolerance. Then, selected forms were further evaluated according to nut characteristics after detailed analysis. The percentage of lateral fruitfulness of selected types was between 10% and 70%. The times of leafing of selected types were 10–20 days later than adjacent types.

Keywords  Juglans regia; late leafing; lateral bud fruitfulness; germplasm

H02092; Received 25 November 2002; accepted 21 May 2004; Online publication date 11 November 2004
New Zealand Journal of Crop and Horticultural Science, 2004, Vol. 32: 337-342
0014-0671/04/3204-0337 $7.00 © The Royal Society of New Zealand 2004

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