AAC Paramount


Denomination: 'AAC Paramount'
Botanical Name: Triticum aestivum
Applicant/Holder: Agriculture & Agri-Food Canada, Lethbridge
Lethbridge Research Centre, 5403 - 1 Avenue, South
P.O. Box 3000
Lethbridge, Alberta
T1J 4B1
Breeder: Harpinder S. Randhawa, Agriculture & Agri-Food Canada, Lethbridge, Alberta
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: 2015-10-07
Application Number: 15-8729

Variety Description

Varieties used for comparison: 'Sadash' and 'AC Andrew'

Summary: The frequency of plants with recurved flag leaves on 'AAC Paramount' is medium whereas the frequency is high in both reference varieties. The spike and culm neck of 'AAC Paramount' have strong glaucosity while those of 'AC Andrew' have weak glaucosity. The shoulder of the lower glume of 'AAC Paramount' has an elevated shape while that of 'AC Andrew' has a straight shoulder shape. 'AAC Paramount' has a greater thousand kernel weight than both reference varieties.


PLANT: soft white spring type, erect growth habit at the 5-9 tiller stage, matures mid-season

SEEDLING (4 LEAF STAGE): absent or very weak anthocyanin colouration of the coleoptile, glabrous sheath and blade of lower leaves

FLAG LEAF: medium frequency of plants with recurved flag leaves, strong glaucosity of sheath, glabrous blade and sheath, absent or very weak glaucosity of lower side of leaf blade, absent or very weak anthocyanin colouration of the auricles

CULM: absent or very sparse hairiness of uppermost node, strong glaucosity, straight neck
STRAW: no anthocyanin colouration at maturity, medium thickness of pith in cross-section

SPIKE: strong glaucosity at heading, tapering shape in profile, dense, white at maturity, inclined attitude, absent or very sparse hairiness of convex surface of apical rachis segment
AWNS: shorter than spike length, white at maturity
LOWER GLUME: ovoid, medium length and width, glabrous, sparse extent of internal hairs
LOWER GLUME SHOULDER: sloping shape, narrow width
LOWER GLUME BEAK: straight, medium length
LOWEST LEMMA: straight beak

KERNEL: white, medium sized, medium length and width, broad elliptic, rounded cheek shape, short brush hairs, medium width and depth of crease
GERM: small, round

AGRONOMIC CHARACTERISTICS: good resistance to shattering


DISEASE REACTIONS: resistant to Stripe rust (Puccinia striiformis), moderately susceptible to Leaf rust (Puccinia recondita), Stem rust (Puccinia graminis f. sp. tritici) and Black point (Alternaria species), and susceptible to Fusarium head blight (Fusarium graminearum, Fusarium species) and Loose smut (Ustilago tritici)

INSECT REACTION: resistant to Wheat Midge (Sitodiplosis mosellana)

Origin & Breeding History: 'AAC Paramount' (experimental designation SWS433) was developed from the cross SWS366 / Sadash (L05078) made at the Agriculture and Agri-Food Canada Lethbridge Research Centre, Lethbridge, Alberta in 2006. F2, F4, F6 and F8 plants were grown in various locations in New Zealand (Leeston, Irwell and Lincoln). F3 heads from bulk plots were grown in Lethbridge and Vauxhall, Alberta and further selection was done on the F5 generations based on plant type, rust resistance, seed colour, seed type and freedom from Black point. In 2010, one row was selected and planted in a replicated yield trial in Lethbridge, Alberta and in disease nurseries. Based on agronomic performance, it advanced to A level testing (3 locations in Alberta) in 2010 as 10A-421 and further advanced to a Soft White B test (4 locations in Alberta) in 2011 as 11B-17. SWS433 was entered in the Soft White Spring Wheat Cooperative Registration trial from 2012 to 2014.

Tests & Trials: Trials for 'AAC Paramount' were conducted during the summers of 2015 and 2016 at Fairfield Farm in Lethbridge, Alberta. Plots that were 2.76 squared metres consisted of 4 rows with a row spacing of 23 cm and a row length of 3 metres. There were 3 replications arranged in an RCB design with 250 plants per square metre and 700 plants per plot.

Comparison table for 'AAC Paramount' with reference varieties 'Sadash' and 'AC Andrew'

Kernel weight (grams per 1000 kernels)

  'AAC Paramount' 'Sadash' 'AC Andrew'
mean (2015) 39.6 32.9 33.9
std. deviation (2015) 0.70 0.42 0.93
mean (2016) 35.1 32.3 30.6
std. deviation (2016) 1.5 1.3 1.2

Click on image for larger view
AAC Paramount
Wheat: 'AAC Paramount' (top) with reference varieties 'Sadash' (centre) and 'AC Andrew' (bottom)

Click on image for larger view
AAC Paramount
Wheat: 'AAC Paramount' (left) with reference varieties 'Sadash' (centre) and 'AC Andrew' (right)

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