WB425

Wheat

Denomination: 'WB425'
Botanical Name: Triticum aestivum
Applicant/Holder: Monsanto Technology, LLC
800 North Lindbergh Boulevard
St. Louis, Missouri
63167
United States of America
Breeder: Monsanto Technology, LLC, St. Louis, United States of America
Agent in Canada: C & M Seeds
6180 5th Line Minto
Palmerston, Ontario
N0G 2P0
Canada
Tel: 519-343-2129
Application Date: 2012-05-30
Application Number: 12-7618
Grant of Rights Date: 2016-01-25
Certificate Number: 5173
Grant of Rights Termination Date: 2036-01-25

Variety Description

Varieties used for comparison: 'CM249', '25R34' and 'E1007R'

Summary: The anthocyanin colouration of the coleoptile of 'WB425' is absent or very weak whereas it is weak to medium on 'CM249' and medium on '25R34'. The flag leaves of 'WB425' are shorter than those of '25R34'. 'WB425' heads earlier than '25R34' and 'E1007R'. At maturity, the plants of 'WB425' are taller than those of 'E1007R'. The lower glumes of 'WB425' are narrower than those of the reference varieties. The lower glume beak of 'WB425' is medium to long whereas it is short on 'CM249' and short to medium length on 'E1007R'. The lower glume beak of 'WB425' is moderately curved whereas it is slightly curved on the reference varieties. 'WB425' has a lower thousand kernel weight than the reference varieties.

Description:

PLANT: soft red winter type, semi-erect growth habit at the 5 to 9 tiller stage, heads emerge mid-season

SEEDLING: absent or very weak intensity of anthocyanin colouration of coleoptile, glabrous lower leaf sheaths and blades

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

CULM NECK: weak to medium glaucosity, straight
STRAW: very thin pith in cross section, no anthocyanin colouration at maturity
SPIKE: medium glaucosity, tapering shape in profile, lax to medium density, white at maturity, inclined to nodding attitude, absent or very sparse hairiness of convex surface of apical rachis segment
AWNS: shorter than length of spike, white
LOWER GLUME: medium length, narrow, glabrous
LOWER GLUME SHOULDER: absent or very narrow, sloping shape
LOWER GLUME BEAK: medium to long, moderately curved

KERNEL: medium red, small size, short, narrow to medium width, broad elliptical shape, rounded cheek, short to medium length brush hairs, narrow and very shallow crease
GERM: small, round to oval shape

Origin & Breeding History: 'WB425' (experimental designation CM8-425) is a soft red winter wheat variety developed by Monsanto Technology LLC, using a modified bulk breeding method. The final cross, 2571/Y91-6B, took place in 1996 in Lafayette, Indiana, USA. In 2004, one F4:5 line was selected. The F9 was bulked from progenies of 20 F8 random single plant selections. Selection criteria included high yield and test weight, resistance to lodging and resistance to Fusarium head blight, leaf rust and powdery mildew.

Tests & Trials: The tests and trials for 'WB425' were conducted in Palmerston, Ontario during the 2012 and 2013 growing seasons. A 4 replicate RCB design was planted with each replicate consisting of 8 rows, measuring 4 metres in length, seeded at a rate of 400 seeds per square metre. Measured characteristics were based on 20 measurements per variety per year; thousand kernel weight measurements were based on 10 measurements per variety per year.


Comparison tables for 'WB425' with reference varieties 'CM249', '25R34' and 'E1007R'

Flag leaf length (cm)

  'WB425' 'CM249' '25R34' 'E1007R'
mean 2012 17.6 17.2 20.1 18.6
std. deviation 2012 1.17 1.93 2.45 3.15
mean 2013 15.5 16.6 17.0 15.7
std. deviation 2013 1.15 2.36 1.57 1.76

Days to heading (from planting)

  'WB425' 'CM249' '25R34' 'E1007R'
mean 2012 230 231 232 232
mean 2013 231 232 233 233

Days to heading (Julian days)

  'WB425' 'CM249' '25R34' 'E1007R'
mean 2012 147 148 149 149
mean 2013 147 148 149 149

Plant height (cm)

  'WB425' 'CM249' '25R34' 'E1007R'
mean 2012 90 94 82 84
std. deviation 2012 4.26 3.97 3.78 3.29
mean 2013 84 82 85 81
std. deviation 2013 2.99 2.64 3.46 4.43

Lower glume width (mm)

  'WB425' 'CM249' '25R34' 'E1007R'
mean 2012 3.0 3.7 3.6 3.9
std. devation 2012 0.45 0.56 0.49 0.62
mean 2013 3.0 3.4 3.5 3.5
std. devation 2013 0.32 0.48 0.50 0.50

Kernel weight (grams per 1000 kernels)

  'WB425' 'CM249' '25R34' 'E1007R'
mean 2012 31.8 37.1 38.6 34.4
std. deviation 2012 1.49 1.77 1.57 0.99
mean 2013 32.6 37.8 39.5 34.8
std. deviation 2013 2.4 2.81 1.62 1.15

Click on image for larger view
WB425
Wheat: 'WB425' (top left) with reference varieties 'CM249' (top right), '25R34' (bottom left) and 'E1007R' (bottom right)

Click on image for larger view
WB425
Wheat: 'WB425' (left) with reference varieties 'CM249' (centre right), '25R34' (centre right) and 'E1007R' (right)

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