Guelph Eclipse
| Denomination: | 'Guelph Eclipse' |
|---|---|
| Previously Proposed Denomination: | 'UG005' |
| Botanical Name: | Asparagus officinalis |
| Applicant/Holder: |
University of Guelph Research Innovation Office Building #92, 50 Stone Road East Guelph, Ontario N1G 2W1 Canada |
| Breeder: |
David Wolyn, University of Guelph, Guelph, Ontario |
| Application Date: | 2015-12-15 |
| Provisional Protection:: | 2015-12-15 |
| Application Number: | 15-8775 |
| Grant of Rights Date: | 2017-12-07 |
| Certificate Number: | 5589 |
| Grant of Rights Termination Date: | 2037-12-07 |
Variety Description
Varieties used for comparison: 'Guelph Evolution', 'Guelph Equinox', 'Guelph Millennium' and 'Gijnlim'
Summary: 'Guelph Eclipse' has a very low frequency of plants with one or more androhermaphrodite flowers whereas 'Guelph Evolution' has a low to medium frequency, 'Guelph Equinox' has a medium to high frequency, and 'Guelph Millennium' and 'Gijnlim' have a strong to very strong frequency of plants with one or more androhermaphrodite flowers. The first bracts at the base of the apex of the spear of 'Guelph Eclipse' are longer than the first bracts at the base of the apex of the spear of 'Guelph Equinox' and 'Guelph Millennium'. The plants of 'Guelph Eclipse' has dense phylloclades whereas 'Guelph Evolution', 'Guelph Equinox', and 'Guelph Millennium' have medium dense phylloclades. When fully extended, the maximum length of the stem of 'Guelph Eclipse' is shorter than the stem of 'Guelph Equinox'. At ground level, the stem of 'Guelph Eclipse' is larger in diameter than the stem of 'Guelph Equinox'.
Description:
PLANT: dense phylloclades, medium intensity of green foliage, many stems, androhermaphrodite flowers and/or male flowers with style rudiments are present, plants with androhermaphrodite flowers occur at a very low frequency
SPEAR: early emergence
SPEAR APEX: medium triangular shape, anthocyanin colouration present, equal in diameter compared to middle of stem
BRACTS: adpressed, closed to weakly open
FLOWERING: begins early in the season
Origin & Breeding History: The male asparagus hybrid 'Guelph Eclipse' (experimental number UG005) is produced by crossing a female clone and a supermale clone. The initial cross was made at the University of Guelph, Guelph, Ontario in 1995. The female parent was a plant selected from an open-pollinated asparagus variety. The supermale parent was a plant grown from seed extracted from andromonoecious berries found on a male asparagus hybrid. Selection criteria for 'Guelph Eclipse' included high marketable yield, resistance to foliar diseases and longevity of years of harvest. The hybrid was also selected for long, smooth spears with tight tips and uniform spear diameter.
Tests & Trials: The comparative trials for 'Guelph Eclipse' were conducted at the Simcoe Research Station, Simcoe, Ontario in 2015 and 2016. There were two replicated plots for each variety of 'Guelph Eclipse', 'Guelph Evolution', 'Guelph Equinox', 'Guelph Millennium', and 'Gijnlim'. Each plot contained twenty crowns spaced 30 cm apart with a distance between rows of 1.25 metres. Mean differences are significant at the 5% probability level based on a paired Student's t-test.
Comparison tables for 'Guelph Eclipse' with reference varieties 'Guelph Evolution', 'Guelph Equinox', 'Guelph Millennium' and 'Gijnlim'
Length of first bracts at base of apex of spear (cm)
| 'Guelph Eclipse' | 'Guelph Evolution' | 'Guelph Equinox' | 'Guelph Millennium' | 'Gijnlim' | |
|---|---|---|---|---|---|
| mean 2015 | 0.9 | 0.9 | 0.8 | 0.8 | 0.9 |
| std. deviation | 0.14 | 0.19 | 0.16 | 0.19 | 0.18 |
| number measured | 39 | 38 | 36 | 39 | 37 |
| mean 2016 | 1.3 | 1.2 | 1.1 | 1.1 | 1.3 |
| std. deviation | 0.18 | 0.20 | 0.20 | 0.13 | 0.18 |
| number measured | 38 | 38 | 36 | 40 | 38 |
Maximum length of fully extended stem (cm)
| 'Guelph Eclipse' | 'Guelph Evolution' | 'Guelph Equinox' | 'Guelph Millennium' | 'Gijnlim' | |
|---|---|---|---|---|---|
| mean 2015 | 141.4 | 140.5 | 155.9 | 146.9 | 141.8 |
| std. deviation | 18.04 | 16.01 | 15.58 | 19.51 | 24.42 |
| number measured | 39 | 38 | 37 | 40 | 38 |
| mean 2016 | 186.3 | 182.2 | 199.8 | 195.5 | 190.9 |
| std. deviation | 28.84 | 15.07 | 17.58 | 17.60 | 28.00 |
| number measured | 39 | 38 | 37 | 40 | 38 |
Diameter of stem at ground level (cm)
| 'Guelph Eclipse' | 'Guelph Evolution' | 'Guelph Equinox' | 'Guelph Millennium' | 'Gijnlim' | |
|---|---|---|---|---|---|
| mean 2015 | 0.8 | 0.7 | 0.7 | 0.7 | 0.7 |
| std. deviation | 0.19 | 0.17 | 0.14 | 0.20 | 0.21 |
| number measured | 39 | 38 | 37 | 40 | 38 |
| mean 2016 | 1.3 | 1.2 | 1.1 | 1.2 | 1.4 |
| std. deviation | 0.39 | 0.16 | 0.22 | 0.37 | 0.33 |
| number measured | 39 | 38 | 37 | 40 | 38 |
Click on image for larger view
Asparagus: 'Guelph Eclipse' (top right) with reference varieties 'Gijnlim' (top left), 'Guelph Millennium' (bottom left), 'Guelph Evolution' (centre bottom), and 'Guelph Equinox' (bottom right)
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