Volume 55 Number 2 Article 15
Year 2001 Month 4
Title: Early Performances of ´Red Fuji` on M.9 Clones and Other Dwarfing Rootstocks
Author: M.R. Warmund
Abstract:
In 1993, trees of 'Red Fuji' (T.A.C. 114) apple (Malus × domestica Borkh.) on 16 dwarf rootstocks
were planted in New Franklin, Missouri (MO) to evaluate tree growth and precocity in a midwestern
climate.
Rootstocks in this study included 11 M.9 clones, as well as B.9, M.27 EMLA, V.1, and V.3.
Tree loss was minimal for all rootstocks in spite of heavy rainfall immediately preceding and following
planting.
By 1997, trees on M.9 NAKBT340, V.1, Mark, and M.9 EMLA had greater trunk cross-sectional areas (TCAs) than those on B.9, M.9, M.9 Janssen 337, V.3, and M.27 EMLA. Trees on M.9
NAKBT340 were also taller than those on M.9 Burgmer 984, M.9 NAKBT337, M.9 Pajam 1, B.9, M.9
Janssen 337, V.3, and M.27 EMLA. V.3 trees produced the greatest number of flower clusters per tree
in 1995. Of the M.9 clones, M.9 NAKB T340 produced more flower clusters than M.9 RN 29, M.9
Burgmer 756, M.9, and M.9 Janssen 337. However, fruit yield of all trees was low due to rainfall and
high winds during bloom in 1995 and frost when flowers were at full pink stage inl996. By 1997, trees
on M.27 EMLA had lower cumulative yield (CY) than those on all other rootstocks.
Although yield efficiency (YE) was statistically similar during the early years of tree growth, differences may become
apparent as trees mature and regular cropping is achieved.
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