Denomination: '25R46'
Previously Proposed Denomination: 'XW10Q'
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: 2012-05-23
Application Number: 12-7612
Grant of Rights Date: 2013-08-12
Certificate Number: 4586
Exemption from compulsory licensing: Yes
Expiry date for exemption from compulsory licensing: 2015-08-12
Grant of Rights Termination Date: 2031-08-12

Variety Description

Varieties used for comparison: '25R47' and '25R51'

Summary: The coleoptile of '25R46' has medium anthocyanin colouration while it is absent or very weak for '25R51'. '25R46' has a flag leaf sheath with strong glaucosity while it is weak for '25R51'. The spike glaucosity of '25R46' is strong while it is weak to medium for the reference varieties. '25R46' has a strong glaucosity of the culm while it is weak for '25R51'. The apical rachis segment of the spike of '25R46' has an absent or very sparse hairiness of the convex surface while it is sparse for '25R47' and medium for '25R51'. '25R46' has a slightly sloping shoulder of the lower glume while it is sloping for '25R47'. The beak length of the lower glume of '25R46' is medium length while it is short for '25R47' and very long for '25R51'. '25R46' has a straight beak of the lowest lemma while it is slightly curved to moderately curved for '25R47'. At maturity, the anthocyanin colouration of the straw of '25R46' is present while it is absent for the reference varieties. The kernel of '25R46' has a medium colouration reaction to phenol while it is light for '25R47' and dark for '25R51'.


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, strong 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, strong glaucosity of the sheath, glabrous blade and sheath

STRAW (AT MATURITY): thin pith in cross-section, anthocyanin colouration present
SPIKE: strong glaucosity at heading, tapering profile, dense to very dense, awns present, awns shorter than the length of the spike
SPIKE AT MATURITY: white, white to light brown awns, incline attitude, curved culm, absent or very sparse hairiness of convex surface of apical rachis segment
LOWER GLUME: narrow to medium width shoulder, slightly sloping shoulder shape, medium length and width, glabrous, medium length slightly curved beak, sparse extent of internal hairs
LOWEST LEMMA: straight beak

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

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

QUALITY: fair pastry and bisquit quality, 7.3% protein

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

INSECT REACTION: susceptible to Hessian Fly (Mayetiola destructor) Biotype E

Origin & Breeding History: '25R46' (experimental designations XW10Q, W020207U1) is the result of a three way cross, W940262W1/25R47//W960095H1 made during 2001 in Windfall, Indiana, USA. '25R46' was bred and selected using a modified pedigree selection method with the following selection criteria; disease resistance, plant type, head type, straw strength, maturity, grain yield, test weight and milling and baking qualities. The F1 generation was grown in a transplant nursery in 2002 in Windfall, Indiana. A bulk population was grown during 2002-2003 in Windfall and Fort Branch, Indiana. Headrow selections occurred from 2003-2004 to 2006-2007 in Windfall and Princeton, Indiana. Preliminary and Elite yield testing occurred between 2007-2008 to 2011-2012 with the variety being released in August 2012 in the USA.

Tests & Trials: Test and trials occurred during the 2010-2011 and 2011-2012 growing seasons in Caledon, Ontario. Plots consisted of 6 rows with a row length of 6 meters and a row spacing of 0.30 meters. There were 3 replicates.

Click on image for larger view
Wheat: '25R46' (left) with reference varieties '25R47' (centre) and '25R51' (right)

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