Denomination: '25R34'
Previously Proposed Denomination: 'XW08C'
Botanical Name: Triticum aestivum
Applicant/Holder: Pioneer Hi-Bred International, Inc.
8305 NW 62nd Avenue
P.O. Box 7060
Johnston, Iowa
United States of America
Breeder: Greg Marshall, Pioneer Hi-Bred International, Inc., Windfall, United States of America
Agent in Canada: Pioneer Hi-Bred Production Co.
c/o DuPont Pioneer Research
RR # 8 , Site 32, Comp # 14
Lethbridge County, Alberta
T1J 4P4
Tel: 403-345-3305; X 6609
Application Date: 2010-06-21
Application Number: 10-7013
Grant of Rights Date: 2011-08-09
Certificate Number: 4111
Exemption from compulsory licensing: Yes
Expiry date for exemption from compulsory licensing: 2013-08-09
Grant of Rights Termination Date: 2029-08-09

Variety Description

Varieties used for comparison: '25R47' and '25W41'

Summary: The intensity of the anthocyanin colouration of the coleoptile of '25R34' is medium while it is absent to very weak for '25W41'. '25R34' has absent or very sparse hairiness of the convex surface of the apical rachis segment while it is medium for '25W41'. The beak shape of the lower glume of '25R34' is slightly curved while it is moderately curved in '25R47'. '25R34' has a slightly curved beak shape of the lower lemma while it is moderately curved in '25R47' and straight in '25W41'. The kernel of '25R34' is a medium red colour while the kernel of '25W41' is white. '25R34' and '25W41' are resistant to the Hessian Fly biotypes E & L while '25R47' is susceptible.


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

SEEDLING (4 leaf stage): medium 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, medium to strong glaucosity of the sheath, glabrous blade and sheath

STRAW (AT MATURITY): thin pith in cross-section, no anthocyanin colouration
SPIKE: weak to medium glaucosity at heading, tapering profile, medium density, awns present, awns equal to slightly longer than the length of the spike
SPIKE AT MATURITY: white, white to light brown awns, nodding attitude, straight culm, absent or very sparse hairiness of convex surface of apical rachis segment
LOWER GLUME: very narrow shoulder, sloping shoulder shape, medium length and width, glabrous, short slightly curved beak, sparse extent of internal hairs
LOWEST LEMMA: slightly curved beak

KERNEL: soft red type, medium red colour, medium to large size, medium to long, medium width, oval, rounded cheek shape, medium length brush hairs, medium sized oval germ, narrow crease, shallow crease, light reaction to phenol

AGRONOMY: good winter survival, good resistance to pre-harvest sprouting

QUALITY: good pastry and bisquit quality

DISEASE REACTION: moderately resistant to Stripe Rust (Puccinia striiformis), moderately resistant to moderately susceptible to Septoria Tritici Blotch (Septoria tritici) and Leaf Rust (Puccinia triticina), moderately susceptible to Fusarium Head Blight (Fusarium graminearum, Fusarium species) Spindle Streak Mosaic Virus and Soil Bourne Mosaic virus, and moderately susceptible to susceptible to Powdery Mildew (Erysiphe graminis, fsp. tritici)

INSECT REACTION: resistant to Hessian Fly (Mayetiola destructor) Biotypes E & L

Origin & Breeding History: '25R34' (experimental designations W000344M1, YW08C, XW08C) is a soft red winter wheat variety developed by Pioneer Hi-Bred International Inc., using a modified pedigree selection breeding method. The final cross, 8302 sib. / WBL0484B2 // 25R47 occurred in 1999 in Windfall, Indiana, USA and was designated W000344. Preliminary yield testing of an F5 selection from an F6 hill plot bulk, designated W000344M1, began in the 2004-2005 growing season. Elite yield testing began in the F9 thru F12 generations. Selection criteria included disease resistance, plant type, height, head type, straw strength, maturity, yield, test weight, and milling and baking qualities.

Tests & Trials: Test and trials were conducted in Caledon, Ontario during the 2008-09 and 2009-10 growing seasons. Plots consisted of 6 rows with a row length of 6 meters and a row spacing of 30 cm. There were 3 replicates arranged in an RCB design.

Click on image for larger view
Wheat: '25R34' (far right) with reference varieties '25R40' (far left), '25R47' (center left) and '25W41' (center right)

Click on image for larger view
Wheat: '25R34' (far right) with reference varieties '25R40' (far left), '25R47' (center left) and '25W41' (center right)

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