5602HR

Wheat

Denomination: '5602HR'
Botanical Name: Triticum aestivum
Applicant/Holder: Syngenta Canada, Inc.
105 Jefferson Street
Morden, Manitoba
R6M 0B8
Canada
Breeder: Joe A. Smith, AgriPro Wheat, Berthoud, United States of America
Application Date: 2004-04-14
Application Number: 04-4167
Grant of Rights Date: 2005-09-06
Certificate Number: 2202
Grant of Rights Termination Date: 2023-09-06

Variety Description

Variety used for comparison: 'McKenzie'

Summary: '5602HR' has weaker intensity of anthocyanin colouration in the coleoptile at the four leaf stage than 'McKenzie'. The flag leaf of '5602HR' is slightly longer and wider than 'McKenzie'. '5602HR' has stronger anthocyanin colouration of the flag leaf auricle than 'McKenzie'. The heading date of '5602HR' is later than 'McKenzie'. '5602HR' is slightly taller than 'McKenzie'. At maturity, '5602HR' has a culm with a straight neck while in 'McKenzie' it is moderately curved. '5602HR' has a thin pith of the straw when looking in cross section while in 'McKenzie' it is a medium thickness. The spike glaucosity of '5602HR' is stronger than in 'McKenzie'. '5602HR' has sparser hairiness of the convex surface of the apical rachis segment of the spike than 'McKenzie'. The lower glume of '5602HR' is wider and longer than in 'McKenzie'. '5602HR' has a wider lower glume shoulder than 'McKenzie'. The lemma beak shape in '5602HR' is straight while it is slightly curved in 'McKenzie'. '5602HR' has an angular kernel cheek shape while it is rounded in 'McKenzie'. The kernel brush hairs of '5602HR' are longer than in 'McKenzie'. '5602HR' is resistant to loose smut (Ustilago tritici) while 'McKenzie' is susceptible.

Description:

'5602HR' is a hard red spring wheat that has very weak to no anthocyanin colouration of the coleoptile at the four leaf stage, and very sparse to no pubescence on the sheaths or blades of the lower leaves. It has an erect to semi erect growth habit with an absent or very low frequency of plants with recurved or drooping flag leaves. The flag leaf has very sparse to no pubescence on the blade or sheath, medium anthocyanin colouration of the leaf auricles and a medium glaucosity. '5602HR' matures mid to late in the season. The neck of the culm or stem has medium glaucosity and is straight. The anthocyanin colouration of the straw at maturity is weakly expressed under certain environmental conditions. The straw has a very thin thickness for the pith when looking at a cross section.

'5602HR' has a tapered shaped spike that is medium in density, nodding in attitude and white in colour with medium to strong glaucosity at maturity. The spike has awns that are medium to long. The spike has sparse hairiness of the convex surface of the apical rachis segment. The lower glume of the spikelet is medium in width, and length with absent to very sparse pubescence. The shape of the shoulder of the lower glume is straight to elevated and medium in width. The beak of the lower glume is very short to short and straight to slightly curved in shape. The shape of the beak of the lemma is straight.

'5602HR' has a hard red kernel type that is medium red in colour, medium in size and mid long, and mid wide. The broad elliptical to elliptical shaped kernel has an angular cheek shape, mid long brush hairs, and a small to medium sized round to oval shaped embryo. The kernel crease is mid wide to wide in width and shallow to mid deep in depth. '5602HR' has good resistance to pre-harvest sprouting and good bread making qualities. '5602HR' is moderately resistant to Fusarium head blight (Fusarium graminearum), and common bunt (Tilletia caries, Tilletia foetida), and resistant to stem rust (Puccinia graminis f. sp. tritici), loose smut (Ustilago tritici), and leaf rust (Puccinia triticina).

Origin & Breeding History: '5602HR' derives from a cross AC Barrie/Norpro which was produced at Berthoud, Colorado in 1995 using a modified pedigree breeding method using single seed descent. Individual head selections were made from F2 population of this cross at an Agripro breeding nursery in Casselton, North Dakota in 1996. Selections in the F2 were based on leaf rust resistance, height and maturity. Single seed descent was used to advance these selections through the F3 and F4 generations in a greenhouse. In 1997, F5 head rows were individually bulked from a selection nursery in Rosebank, Manitoba based on height, maturity, and disease resistance to leaf rust, stem rust, tan spot, and septoria leaf spots. Individual F6 bulks were screened and selected from a four-location nursery in 1998. One of these selections was designated N99-2234 and tested in Proven seed research plots from 1999 through the 2003 seasons based on evaluation for yield, test weight, height, lodging, maturity, leaf rust, stem rust, foliar diseases, seed dormancy, kernel type and breadmaking quality. It was tested in the Central Bread Co-op as BW297 during the 2001 to 2003 seasons.

Tests & Trials: Tests and trials were conducted at the Proven Seed Research Farm, Rosebank, Manitoba in the years 2003, and 2004. Plots consisted of 6 rows, with a thousand plants spaced one inch apart. Plot size was 3.6 square meters. There were 3 reps.


Comparison tables for '5602HR' with reference variety 'McKenzie'

Flag leaf length (cm)

  '5602HR' 'McKenzie'
mean 25.4 20.9
std. deviation 2.1 3.0

Flag leaf width (mm)

  '5602HR' 'McKenzie'
mean 15.9 14.3
std. deviation 1.4 1.0

Plant height (cm)

  '5602HR' 'McKenzie'
mean 105.1 99.3
std. deviation 6.4 7.0

Heading (days from planting to 50% heads fully emerged)

  '5602HR' 'McKenzie'
number of days 56.2 54.3
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