CDC Spectrum

Pea

Denomination: 'CDC Spectrum'
Previously Proposed Denomination: '2936-7'
Botanical Name: Pisum sativum
Applicant/Holder: University of Saskatchewan
Crop Development Centre
4D36 Agriculture Building, 51 Campus Drive
Saskatoon, Saskatchewan
S7N 5A8
Canada
Breeder: Tom Warkentin, University of Saskatchewan, Saskatoon, Saskatchewan
Application Date: 2014-04-09
Application Number: 14-8270
Grant of Rights Date: 2017-05-10
Certificate Number: 5477
Grant of Rights Termination Date: 2037-05-10

Variety Description

Varieties used for comparison: 'CDC Amarillo', 'CDC Golden' and 'CDC Meadow'

Summary: The number of nodes, up to and including the first fertile node, on the stem of the plants of 'CDC Spectrum' is medium to many whereas it is few to medium for 'CDC Golden'. The density of flecking on the stipules of 'CDC Spectrum' is very sparse whereas it is medium density for 'CDC Golden'. The pod length of 'CDC Spectrum' is longer than that of 'CDC Golden' and 'CDC Meadow'. The stem length of 'CDC Spectrum' is longer than that of 'CDC Golden'. The 100 seed weight of 'CDC Spectrum' is heavier than that of 'CDC Meadow'.

Description:

PLANT: field type, no anthocyanin colouration, no stem fasciation, medium intensity of green colour at flowering, no leaflets, late maturing

STEM: no anthocyanin colouration of axil, medium to many nodes up to and including first fertile node

STIPULE: medium to long from axil to tip, absent or very short lobe below axil, very sparse density of flecking

FLOWER: blooms mid-season, two flowers per node
STANDARD: white, level to moderately arched base, absent or very weak undulation
UPPER SEPAL: medium width

POD: parchment entire, thickened wall absent, blunt distal part, weak curvature, medium green when fully swollen, suture strings present
IMMATURE SEED: light green
DRY SEED: ellipsoid shape, simple starch grain, yellow cotyledon, hilum same colour as testa

Origin & Breeding History: 'CDC Spectrum' (experimental designation CDC 2936-7) was developed from the cross 'CDC Meadow' / 'Polstead' // 'CDC Bronco' carried out in 2005 at the Crop Development Centre at the University of Saskatchewan, Saskatoon, Saskatchewan. In 2006, a single plant was selected from the F2 population. Yield, days to maturity, days to flower, vine length, resistance to lodging, seed weight, seed size and seed coat breakage, disease resistance, crude protein concentration and cooking time were evaluated in subsequent generations. 'CDC Spectrum' was entered in and evaluated as '2936-7' in the Field Pea Cooperative Registration Tests in 2012 and 2013.

Tests & Trials: Tests and trials for 'CDC Spectrum' were conducted at the Sutherland Field Site of the Crop Development Centre of the University of Saskatchewan, Saskatoon, Saskatchewan during the 2014 and 2015 growing seasons. The trials were conducted using a complete randomized block design consisting of 2 replications per variety. Each replicate consisted of 3 rows spaced 30 cm apart with a row length of 3.66 metres and a planting density of 65 seeds per square metre. Measured characteristics were based on 20 measurements per variety per year. Mean differences were significant at the 5% confidence probability level based on a paired Student's t-test.


Comparison tables for 'CDC Spectrum' with reference varieties 'CDC Amarillo', 'CDC Golden' and 'CDC Meadow'

Pod length (cm)

  'CDC Spectrum' 'CDC Amarillo' 'CDC Golden' 'CDC Meadow'
mean 2014 7.0 6.9 6.4 6.6
std. deviation 2014 0.61 0.33 0.62 0.60
mean 2015 6.8 6.6 5.9 6.2
std. deviation 2015 0.5 0.5 0.5 0.6

Stem length (cm)

  'CDC Spectrum' 'CDC Amarillo' 'CDC Golden' 'CDC Meadow'
mean 2014 82.4 82.3 67.1 77.6
std. deviation 2014 7.27 4.85 6.65 7.61
mean 2015 70.1 68.4 58.7 67.2
std. deviation 2015 6.3 7.9 6.1 7.1

Seed weight (grams/100 seeds)

  'CDC Spectrum' 'CDC Amarillo' 'CDC Golden' 'CDC Meadow'
mean 2014 22.6 20.7 20.6 19.8
std. deviation 2014 0.6 0.7 0.8 0.0
mean 2015 24.7 22.5 21.8 21.2
std. deviation 2015 1.0 2.4 0.8 0.3

Click on image for larger view
CDC Spectrum
Pea: 'CDC Spectrum' (bottom) with reference varieties 'CDC Meadow' (top left), 'CDC Golden' (top centre) and 'CDC Amarillo' (top right)

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