25W38

Wheat

Variety Description

Variety used for comparison: '25W31'

Summary: At maturity, the plants of '25W38' are shorter than the plants of '25W31'. Excluding the awns, the spike of '25W38' is shorter than the spike of '25W31'. The lower glume beak is short to medium in length for '25W38' whereas it is long for '25W31'.

Description:

PLANT: winter type, soft white, common wheat, semi-erect growth habit at the 5 to 9 tiller stage, high frequency of plants with recurved flag leaves

SEEDLING (4-leaf stage): glabrous sheath and blade of the lower leaves

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

CULM: weak to medium glaucosity
STRAW: thin pith in cross-section

SPIKE: weak glaucosity, tapering, medium to dense, white at maturity
AWNS: shorter than length of spike, white to light brown at maturity
LOWER GLUME SHOULDER: narrow to medium width, sloping to slightly sloping
LOWER GLUME: medium length and width, glabrous, sparse to medium extent of internal hairs
LOWER GLUME BEAK: medium length, slightly curved shape
LOWEST LEMMA BEAK: straight to slightly curved

KERNEL: white to light red, medium sized, medium length, narrow to medium width, oval, brush hairs of medium length, narrow to medium width crease, medium to deep crease
KERNEL GERM: medium to large size

Origin & Breeding History: '25W38' originated from a three-way cross made between proprietary selections in a controlled environment by Pioneer Hi-Bred International in Windfall, Indiana. The final cross was made in 2002. It was further developed using the pedigree method of plant breeding. The F1 generation was grown in a transplant nursery, bulked and grown at 2 locations in Indiana, USA in 2004. Plant selections were conducted at the F2 generation with resulting F3 head rows selected and bulked in 2006. In 2007, F4 bulk selections were grown and F5 plant selections resulted in F6 head rows grown at 2 locations in Indiana, USA in 2008. Preliminary yield testing began in 2009 at the F7 generation and continued through to the F14 generation in 2016. Selection criteria was based on disease resistance, plant type, plant height, head type, straw strength, maturity, grain yield, test weight as well as milling and baking characteristics.

Tests & Trials: The comparative trials for '25W38' were conducted during the 2016 and 2018 growing seasons in Georgetown, ON. Plots consisted of 6 rows, with a row length of 6.0 metres and row spacing of 0.3 metres. There were 3 replications arranged in an RCB design. Measured characteristics were based on a minimum of 24 measurements per variety per year. Mean differences are significant at the 5% probability level based on a Student's t-test.

Comparison tables for '25W38' with reference variety '25W31'

Plant height (at maturity) (including awns) (cm)

Spike length (excluding awns) (cm)

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Wheat: '25W38' (left) with reference variety '25W31' (right)

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Wheat: '25W38'

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Wheat: Reference variety '25W31'