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CDC Sunburst


Denomination: 'CDC Sunburst'
Previously Proposed Denomination: '4510-3-1'
Botanical Name: Phaseolus vulgaris
Applicant/Holder: University of Saskatchewan
Crop Development Centre
4D36 Agriculture Building, 51 Campus Drive
Saskatoon, Saskatchewan
S7N 5A8
Breeder: Kirstin Bett, University of Saskatchewan, Saskatoon, Saskatchewan
Application Date: 2018-05-02
Provisional Protection:: 2018-05-02
Application Number: 18-9453
Grant of Rights Date: 2021-05-20
Certificate Number: 6423
Grant of Rights Termination Date: 2041-05-20

Variety Description

Varieties used for comparison: 'CDC Sol', 'AAC Y012' and 'AAC Y015'

Summary: The tip of the terminal leaflet of 'CDC Sunburst' is of medium length while that of 'AAC Y012' and 'AAC Y015' is long. The plants of 'CDC Sunburst' flower early to mid-season while the plants of 'CDC Sol' flower mid to late season. Excluding the beak, the pod of 'CDC Sunburst' is shorter than that of 'AAC Y015'. The pod curvature of 'CDC Sunburst' is weak whereas it is absent or very weak for 'CDC Sol' and 'AAC Y015' and absent or very weak to weak for 'AAC Y012'. The seed weight of 'CDC Sunburst' is greater than that of 'AAC Y012' and 'AAC Y015'. The plants of 'CDC Sunburst' mature earlier than the plants of 'CDC Sol' and 'AAC Y015'.


PLANT: dwarf and determinate growth type, no development of guides, 50% of plants begin flowering early to mid-season

LEAF: medium green, strong rugosity
TERMINAL LEAFLET: medium sized, circular to quadrangular shaped, medium length tip

INFLORESCENCE: predominantly positioned in foliage at full flowering
FLOWER: pinkish white standard, pinkish white wing

POD: ovate in cross-section, green ground colour, no secondary colour, stringiness of ventral suture present, weak degree of curvature, acute at distal part excluding beak, absent or very weak curvature of beak, smooth or slightly rough surface, moderate constrictions between seeds at dry stage

SEED: yellow type, high weight, circular to elliptic shape in longitudinal section, medium elliptic shape in cross-section, medium width in cross-section, medium length, yellow

Origin & Breeding History: 'CDC Sunburst' (experimental designation 4510-3-1) was developed at the Crop Development Centre at the University of Saskatchewan in Saskatoon, Saskatchewan. It was derived from an F2 single plant selection from a cross between 3215-2 and 3843-4F2 made in July 2009. Screening and selections were done from the F3 to F8 generations. Selections were based on days to flower, days to maturity, yield, plant height, lodging, pod clearance, seed weight, disease resistance and canning traits. In the F6 generation, single plants were selected and the resulting progeny were grown in plots for two generations with selection for uniformity, days to maturity, plant type and seed size. In the F9 generation, 51 sub-lines were used to establish breeder seed. 'CDC Sunburst' was evaluated in Short Season Narrow Row Dry Bean Cooperative Registration Trials for two years; 2016 and 2017.

Tests & Trials: The comparative trials for 'CDC Sunburst' were conducted in the summer of 2018 and 2019 in Saskatoon, Saskatchewan. Plots consisted of 3 rows with a row spacing of 30 cm and a row length of 3.66 metres. Plants within a row were spaced at 48 seeds per square metre. There were 2 replicates. Measured characteristics were based on 20 measurements per variety per year except seed weight, which was based on 8 measurements per variety per year. Mean differences were significant at the 5% probability level based on a paired Student`s t-test.

Comparison tables for 'CDC Sunburst' with reference varieties 'CDC Sol', 'AAC Y012' and 'AAC Y015'

Pod length, excluding beak (cm)

  'CDC Sunburst' 'CDC Sol' 'AAC Y012' 'AAC Y015'
mean 2018 9.8 10.3 9.8 11.3
std. deviation 2018 1.2 1.2 1.4 1.0
mean 2019 10.6 9.4 10.4 11.5
std. deviation 2019 1.1 0.9 1.3 0.8

Seed weight (grams per 100 seeds)

  'CDC Sunburst' 'CDC Sol' 'AAC Y012' 'AAC Y015'
mean 2018 40.21 40.92 36.78 38.59
std. deviation 2018 0.8 0.9 1.2 1.2
mean 2019 43.73 30.50 38.48 40.35
std. deviation 2019 1.5 0.6 1.1 1.3

Days to maturity

  'CDC Sunburst' 'CDC Sol' 'AAC Y012' 'AAC Y015'
mean 2018 88.5 96.5 86 96
mean 2019 105.5 111 106 109

Click on image for larger view
CDC Sunburst
Bean: 'CDC Sunburst' (left) with reference varieties 'CDC Sol' (centre left), 'AAC Y012' (centre right) and 'AAC Y015' (right)

Click on image for larger view
CDC Sunburst
Bean: 'CDC Sunburst' (left) with reference varieties 'CDC Sol' (centre left), 'AAC Y012' (centre right) and 'AAC Y015' (right)

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