Hybrid ash tree named ‘Northern Gem’

Details Hybrid ash tree named ‘Northern Gem’ Hybrid ash tree named ‘Northern Gem’

1999-01-20

2001-02-13

Campell, Bruce R. (Department: 1662)

Plants

Rose

Climber

Plant Patent

active

PP011777

ABSTRACT:

SUMMARY OF THE INVENTION
The original hybrid ash tree of the present invention was created during the early 1970's at the Agriculture and Agri-Food Canada Morden Research Centre, Morden, Manitoba, Canada, through the use of controlled breeding program. The female parent (i.e., the seed parent) was a Black Ash (
Fraxinus nigra
Marsh.) obtained from a native population in eastern Manitoba, Canada. The male parent (i.e., the pollen parent) was
Faxinus mandshurica
Rupr. that was originally obtained from the United States Department of Agriculture at Beltsville, Md. in 1959. The hybridization resulted in the formation of a population which included several promising seedlings including the new cultivar of the present invention having characteristics intermediate the two parental species. This controlled breeding program is believed to be the first known report of a hybrid ash cultivar that was created through the successful hybridization of these two species. The resulting seedlings were planted in the nursery row and have been observed for a period of over fifteen years. The final selection of the new cultivar was made in 1989. A single plant of the new variety was observed. The new cultivar also has undergone additional testing at regional trials in western Canada.
It has been found that the new
Fraxinus nigra
Marsh.×
Fraxinus mandshurica
Rupr. ash tree of the present invention exhibits:
(a) A vigorous growth habit,
(b) An oval to round-shaped tree form,
(c) Dull green pinnately compound leaves,
(d) Forms perfect flowers,
(e) Exhibits good hardiness, and
(f) Is particularly well suited for use as a shade tree.
The new cultivar of the present invention has been found to combine the hardiness of the
Fraxinus nigra
Marsh. female parent with the form of the
Fraxinus mandshurica
Rupr. male parent.
The new cultivar of the present invention has been asexually reproduced beginning in the late 1970's by budding and grafting onto local strains of Green Ash (
Fraxinus pennsylvanica
Marsh.) at Morden, Manitoba, Canada. Such propagation has demonstrated that the combination of characteristics described herein is stable and is successfully transmitted to succeeding generations. The propagation can be similarly conducted on Black Ash (
Fraxinus nigra
).
The same cross identified above also formed the ‘Northern Treasure’ cultivar which is the subject matter of our U.S. Plant patent application Ser. No. 09/233,440, filed concurrently herewith. The new cultivar of the present invention can be readily distinguished from the ‘Northern Treasure’ cultivar since the new cultivar of the present invention exhibits a different form which is oval to round-shaped. The crown of the ‘Northern Treasure’ cultivar is upright with an acute branching habit. Also, the new cultivar of the present invention may be slightly less hardy than the sister ‘Northern Treasure’ cultivar.
The new hybrid ash tree of the present invention initially was designated No. 8920 and subsequently has been named the ‘Northern Gem’ cultivar.


REFERENCES:
Davidson, Campbell G. ‘Northern Treasure’ and ‘Northern Gem’ hybrid ash. Hortscience 34 (1): p151-152. Feb. 1999.

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