Umbra

Bean

Variety Description

Varieties used for comparison: 'OAC Vortex' and 'Zorro'

Summary: The plants of ‘Umbra' are taller than those of ‘Zorro'. At full flowering, the upper side of the leaf of ‘Umbra' is dark to very dark green while that of ‘OAC Vortex' is medium green and that of ‘Zorro' is medium to dark green. The plants of ‘Umbra' flower later than those of the reference varieties. Stringiness of the ventral suture is present on the pod of ‘Umbra' while it is absent on the pods of the reference varieties. The pod of ‘Umbra' has absent or very weak curvature while the pod of ‘OAC Vortex' has a weak concave curvature. The beak on the pod of 'Umbra' is longer than that of ‘OAC Vortex'. The seed weight of 'Umbra' is less than that of ‘OAC Vortex' and greater than that of ‘Zorro'.

Description:

PLANT: strong intensity of anthocyanin colouration of hypocotyl, dwarf growth type, indeterminate growth type

LEAF: dark to very dark green on upper side
TERMINAL LEAFLET: small

FLOWERING TIME: mid-season
FLOWER: violet standard, violet wing
POD: ovate shape in cross-section, medium length, green ground colour, secondary colour present, sparse pink flecks just before drying, stringiness of ventral suture is present, absent or very weak curvature, medium length beak, weak curvature of beak

SEED: black type, medium seed weight, circular to elliptic in longitudinal section, medium elliptic shape in cross-section, narrow to medium width in cross-section, short
SEED COAT: one colour, black

DISEASE REACTIONS: susceptible to anthracnose race 73 (Colletotrichum lindemuthianum); susceptible to common bacterial blight (Xanthomonas campestris pv phaseoli)

Origin & Breeding History: 'Umbra' (experimental designation OAC 20-B5) originated from a controlled cross conducted in 2014 at the University of Guelph in Guelph, Ontario between the variety ‘Zorro' and the line W11WE194. The variety was advanced with single F5 plants selected in 2016 based on high pod number, plant architecture and maturity. An F6 line, evaluated in preliminary and advanced yield trials in 2018 and 2019 was designated OAC 20-B5 and entered in the Variety Registration Trials in 2020 and 2021. Breeder seed was established at the F9 generation in 2023.

Tests & Trials: 'Umbra' (experimental designation OAC 20-B5) originated from a controlled cross conducted in 2014 at the University of Guelph in Guelph, Ontario between the variety ‘Zorro' and the line W11WE194. The variety was advanced with single F5 plants selected in 2016 based on high pod number, plant architecture and maturity. An F6 line, evaluated in preliminary and advanced yield trials in 2018 and 2019 was designated OAC 20-B5 and entered in the Variety Registration Trials in 2020 and 2021. Breeder seed was established at the F9 generation in 2023.

Comparison tables for 'Umbra' with reference varieties 'OAC Vortex' and 'Zorro'

Plant height (cm)

Days to flower (days from planting to when 50% of the plants have at least one flower)

Beak length (mm)

Seed weight (grams per 100 seeds) (g)

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Bean: Candidate variety ‘Umbra'

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Bean: ‘Umbra' (centre) with reference varieties ‘Zorro' (left) and ‘OAC Vortex' (right)