AAC Ryley


Denomination: 'AAC Ryley'
Previously Proposed Denomination: 'HY1312'
Botanical Name: Triticum aestivum
Applicant/Holder: Agriculture & Agri-Food Canada, Swift Current Research and Development Centre
1 Airport Road
P.O. Box 1030
Swift Current, Saskatchewan
S9H 3X2
Breeder: Ron De Pauw, Agriculture & Agri-Food Canada, Swift Current, Saskatchewan
Agent in Canada: Agriculture & Agri-Food Canada
Office of Intellectual Property and Commercialization
6000 C&E Trail
Lacombe, Alberta
T4L 1W1
Tel: (403) 782-8126
Application Date: 2012-04-20
Application Number: 12-7596
Grant of Rights Date: 2014-11-26
Certificate Number: 4960
Grant of Rights Termination Date: 2032-11-26

Variety Description

Varieties used for comparison: 'Alsen', 'AC Crystal' and 'AC Vista'

Summary: The intensity of anthocyanin colouration of the coleoptile of 'AAC Ryley' is medium whereas the intensity is absent or very weak on 'AC Vista'. The anthocyanin colouration of the flag leaf auricles of 'AAC Ryley' is absent or very weak whereas the intensity is medium on 'AC Crystal' and weak to medium on 'AC Vista'. The flag leaves of 'AAC Ryley' are longer than those of 'AC Crystal' and wider than those of the reference varieties. The spike of 'AAC Ryley' is longer than that of 'Alsen'. The awns of 'AAC Ryley' are longer than those of the reference varieties. The lower glume of 'AAC Ryley' is longer than that of 'Alsen' and shorter than that of 'AC Crystal' and 'AC Vista'. The kernel of 'AAC Ryley' is dark red whereas it is amber in 'Alsen' and white in 'AC Crystal'. The kernel size of 'AAC Ryley' is large to very large whereas it is small in 'Alsen'. The kernel shape of 'AAC Ryley' is elliptical whereas it is oval in 'Alsen' and broad elliptical in 'AC Crystal'. The kernel brush hairs of 'AAC Ryley' are long whereas they are short to medium length on 'Alsen' and medium length on 'AC Crystal' and 'AC Vista'.


PLANT: spring type, intermediate growth habit at the 5 to 9 tiller stage, matures mid-season

SEEDLING: medium intensity of anthocyanin colouration of coleoptile, glabrous lower leaf sheaths and blades

FLAG LEAF: medium frequency of plants with recurved/drooping flag leaves, absent or very weak anthocyanin colouration of auricles, medium glaucosity of sheath, glabrous blade and sheath

CULM NECK: medium glaucosity, no curvature
STRAW: thin pith in cross section, no anthocyanin colouration at maturity
SPIKE: medium glaucosity, parallel-sided shape, medium density, white at maturity, inclined attitude, absent or very sparse hairiness of convex surface of apical rachis segment
AWNS: longer than length of spike, white
LOWER GLUME: long, medium width
LOWER GLUME SHOULDER: narrow, straight to elevated shape
LOWER GLUME BEAK: long, slightly curved

KERNEL: medium hardness, dark red colour, large to extra large, elliptical shape, rounded to angular cheek, long brush hairs, medium to wide width and very shallow depth of crease
GERM: medium size, round shape


DISEASE REACTION: resistant to Leaf Rust (Puccinia triticina) and Stem Rust (Puccinia graminis f. sp. tritici); resistant to moderately resistant to Common Bunt (Tilletia laevis, Tilletia tritici); moderately resistant to moderately susceptible to Loose Smut (Ustilago tritici) and susceptible to Fusarium Head Blight (Fusarium graminearum, Fusarium species)

Origin & Breeding History: 'AAC Ryley' (experimental designation 'HY1312') is derived from the cross 'AC Vista' / 'Alsen' // 'HY485' made in 2003 at the Semiarid Prairie Agricultural Research Centre of Agriculture and Agri-Food Canada, Swift Current, Saskatchewan. F2 seeds were inoculated with Common Bunt and planted in a Leaf and Stem Rust epiphytotic nursery. Disease-free, strong-stemmed and early maturing plants were selected, threshed and selected for kernel characteristics. Seed of the F3 generation was grown in a contra-season nursery in New Zealand where selections were made based on maturity, plant height and straw strength. The F4, F6 and F8 lines were planted and screened in various locations in Saskatchewan and Alberta (Swift Current, Indian Head, Regina and Lethbridge) and assessed for agronomic performance and grain characteristics (end-use suitability, volume weight, seed size and kernel attributes). The F5 and F7 generations were grown in nurseries in New Zealand. In the F4, F6 and F8 generations, selections were made based on reactions to Leaf and Stem Rust and resistance to Loose Smut and Common Bunt. Through this breeding process, the experimental line C0302-GB26E was selected and in 2008, was evaluated as 'HY1312' in the High Yield Wheat A test and entered in the High Yield Wheat B test in 2009 and the High Yield Wheat Cooperative tests for 2009 to 2011.

Tests & Trials: Tests and trials were conducted at the Semiarid Prairie Agricultural Research Centre, Swift Current, Saskatchewan in 2011 and 2012. Plots consisted of 4 rows, each 5 metres long with an inter-row spacing of 23 cm with 4 replications per variety arranged in an RCB design. There were 40 leaf and 20 spike measurements. Plant height measurements were recorded as an average in each replicated plot. Means are based on a two year average. Differences are significant at the 5% probability level based on LSD values. Disease ratings were provided through the High Yield Wheat Co-operative Test 2009 to 2011.

Comparison tables for 'AAC Ryley' with reference varieties 'Alsen', 'AC Crystal' and 'AC Vista'

Flag leaf length (cm)

  'AAC Ryley' 'Alsen' 'AC Crystal' 'AC Vista'
mean (LSD=3.5) 28.9 26.6 22.8 26.6
std. deviation 3.0 2.9 3.2 2.6

Flag leaf width (mm)

  'AAC Ryley' 'Alsen' 'AC Crystal' 'AC Vista'
mean(LSD=0.8) 18.6 16.3 16.6 16.1
std. deviation 1.5 1.3 1.3 1.1

Spike length (cm)

  'AAC Ryley' 'Alsen' 'AC Crystal' 'AC Vista'
mean(LSD=1.0) 10.4 9.1 9.8 9.8
std. deviation 0.6 0.4 0.5 0.5

Awn or awnlet length (cm)

  'AAC Ryley' 'Alsen' 'AC Crystal' 'AC Vista'
mean(LSD=0.3) 9.3 7.8 7.4 8.9
std. deviation 0.55 0.60 0.79 0.69

Click on image for larger view
AAC Ryley
Wheat: 'AAC Ryley' (right) with reference varieties 'Alsen' (left), 'AC Crystal' (centre left) and 'AC Vista' (centre right)

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