Denomination: 'Keldin'
Previously Proposed Denomination: 'ACS 55017'
Botanical Name: Triticum aestivum
Applicant/Holder: PZO Pflanzenzucht Oberlimpurg
Oberlimpurg 2
D 74523
Schwächisch Hall
Breeder: Peter Franck, PZO Pflanzenzucht Oberlimpurg, Schwächisch Hall, Germany
Agent in Canada: C & M Seeds
6180 5th Line Minto
Palmerston, Ontario
N0G 2P0
Tel: 519-343-2129
Application Date: 2009-10-16
Application Number: 09-6746
Protective direction granted: - -
Grant of Rights Date: 2011-11-25
Certificate Number: 4219
Grant of Rights Termination Date: 2029-11-25

Variety Description

Varieties used for comparison: 'Carlisle' and 'Maxine'

Summary: 'Keldin' has a medium frequency of plants with recurved flag leaves while it is a very low to low frequency in 'Carlisle'. The glaucosity of the sheath of the flag leaf in 'Keldin' is strong while it is medium in 'Carlisle' and absent or very weak in 'Maxine'. 'Keldin' heads later than the reference varieties. The spike glaucosity at heading for 'Keldin' is medium to strong while it is weak in 'Carlisle'. 'Keldin' has a taller plant height at maturity than 'Carlisle'. The pith in cross section at maturity for 'Keldin' is thin while it is medium to thick for 'Carlisle'. 'Keldin' has a dense spike while it is a medium density for the reference varieties. The spike of 'Keldin' is longer than the reference varieties. At maturity, the hairiness of the convex surface of the apical rachis segment in 'Keldin' is dense while it is very dense in 'Carlisle' and sparse in 'Maxine'. 'Keldin' matures later than 'Carlisle'. 'Keldin' has a medium shoulder width of the lower glume while it is narrow in 'Carlisle'. The shoulder shape of the lower glume in 'Keldin' is straight to elevated while it is slightly sloping for 'Maxine'. 'Keldin' has a moderately curved beak of the lower glume while it is slightly curved in 'Maxine'. The kernel of 'Keldin' has a medium crease width while it is narrow in 'Maxine'.


PLANT: winter type, common wheat, erect growth habit at the 5-9 tiller stage, strong glaucosity of the culm at heading, medium frequency of plants with recurved flag leaves, medium maturity

SEEDLING (4 leaf stage): absent or very weak intensity of anthocyanin colouration of the coleoptile, glabrous sheaths and blades of the lower leaves

FLAG LEAF: absent or very weak intensity of anthocyanin colouration of the auricles, strong glaucosity of the sheath, glabrous blade and sheath

STRAW (AT MATURITY): thin pith in cross-section, no anthocyanin colouration
SPIKE: medium to strong glaucosity at heading, tapering profile, dense, awns present, awns shorter than the length of the spike
SPIKE AT MATURITY: white, whitish awns, nodding attitude, straight neck of the culm, dense hairiness of convex surface of apical rachis segment
LOWER GLUME: medium shoulder width, straight to elevated shoulder, medium length and width, medium to long beak, moderately curved beak

KERNEL: hard red type, dark red colour, medium size, medium to long, medium width, broad elliptical to elliptical, rounded cheek shape, short to medium length brush hairs, small to medium sized round to oval germ, medium crease width, very shallow crease depth

AGRONOMY: good resistance to shattering, fair to good winter survival

QUALITY: good bread making

Origin & Breeding History: 'Keldin' (experimental designation ACS 55017) is a winter wheat variety developed by Dr. Peter Franck of ACS-PZO, Germany. The cross took place in Oberlimpurg, Germany during 1996 between (Bernburg 235 x Carlisle) / TRX-A16-3-2 using the pedigree breeding method. Selection criteria included high yield, lodging resistance, disease resistance and milling and bread making quality.

Tests & Trials: Test and trials were conducted in 2009 and 2010 at C&M Seeds in Palmerston, Ontario. Plots consisted of 8 rows with a row length of 4 meters and a row spacing of 15 cm. Planting density was 400 seeds per meter squared. There were 4 replicates arranged in an RCB design.

Comparison tables for 'Keldin' with reference varieties 'Carlisle' and 'Maxine'

Means are based on the average of the two years.

Days to heading (days from planting to when 50% of heads fully emerged from boot)

  'Keldin' 'Carlisle' 'Maxine'
mean 162 158 158

Plant height at maturity (cm)

  'Keldin' 'Carlisle' 'Maxine'
mean 93 87 93
std. deviation 2.49 4.60 4.40

Spike length (excluding awns) (mm)

  'Keldin' 'Carlisle' 'Maxine'
mean 88 79 78
std. deviation 4.14 3.03 3.56

Click on image for larger view
Wheat: 'Keldin' (center) with reference varieties 'Carlisle' (left) and 'Maxine' (right)

Click on image for larger view
Wheat: 'Keldin' (center) with reference varieties 'Carlisle' (left) and 'Maxine' (right)

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