Volume 63 Number 1 Article 1
Year 2009 Month 1
Title: Selection of Crabapple Pollinizers for 'Fuji' and 'Tsugaru' Apple
Authors: H. Bessho, M. Wada, K. Kudo, Y. Inomata, H. Iwanami, K. Abe, J. Soejima, S. Komori, A. Suzuki
Abstract:
Crabapple cultivars and Malus species were examined as pollinizers for two major apple cultivars in Japan: ‘Fuji’
and ‘Tsugaru’. Data on flowering dates, flowering intensity, and cross-compatibility were collected on 19 crabapple
cultivars over several years.
The following cultivars were selected as potential pollinizers for ‘Fuji’ and ‘Tsugaru’:
M. baccata 79091 and ‘Sentinel’ for early bloom; M. × atrosanguinea 20004522, ‘Red Bud’, and ‘Snowdrift’ for
mid-bloom.
All cultivars selected had white flowers with single petals. M. baccata 79091 and ‘Sentinel’ bloomed
about 2 to 3 days earlier than ‘Fuji’ and ‘Tsugaru’. Bloom time of terminal buds of M. × atrosanguinea 20004522,
‘Red Bud’, and ‘Snowdrift’ was similar to ‘Fuji’ and ‘Tsugaru’. All selected crabapple cultivars had high bloom
density.
The percentage of fruit set for all cross combinations between crabapples and commercial cultivars was
high. ‘Sentinel’ coincided with the bloom period of ‘Fuji’ and ‘Tsugaru’. However, ‘Sentinel’ tended produce
fewer seeds per fruit in cross combination with ‘Fuji’. The other crabapples that we selected did not overlap with
the entire bloom period of ‘Fuji’ and ‘Tsugaru’. Therefore, both an early-blooming pollinizer and a mid-blooming
pollinizer should be planted in the same orchards.
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