AAC Indus

Wheat

Variety Description

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

Summary: The plants of 'AAC Indus' are later heading than those of both reference varieties. The glaucosity of the spike of 'AAC Indus' is very strong whereas that of 'Sadash' is medium and that of 'AC Andrew' is absent or very weak. The plants of 'AAC Indus' are taller than those of 'AC Andrew'. The spike length of 'AAC Indus' is longer than that of 'Sadash'. The spike attitude of 'AAC Indus' is erect whereas that of both reference varieties is inclined. The shoulder width of the lower glume of 'AAC Indus' is broad whereas it is medium width for 'Sadash' and narrow for 'AC Andrew'. The shoulder shape of the lower glume of 'AAC Indus' is strongly elevated with a second point present whereas that of 'Sadash' is straight and that of 'AC Andrew' is sloping. The beak of the lower glume of 'AAC Indus' is long whereas it is short for both reference varieties.

Description:

PLANT: soft white spring type, erect growth habit at the 5 to 9 tiller stage, heads emerge late, late maturing

SEEDLING: absent or very weak intensity of anthocyanin colouration of coleoptile, glabrous lower leaf sheaths and blades

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

CULM NECK: absent or very sparse density of hairiness of uppermost node, absent or very weak glaucosity, straight
STRAW: thin pith in cross-section, no anthocyanin colouration at maturity
SPIKE: very strong glaucosity, tapering shape in profile, dense, white at maturity, erect attitude, absent or very sparse hairiness of convex surface of apical rachis segment
AWNS: shorter than length of spike, white at maturity
LOWER GLUME: medium oblong shape, medium length and width, glabrous, sparse extent of external and internal hairs
LOWER GLUME SHOULDER: broad, shape strongly elevated with second point present
LOWER GLUME BEAK: long, straight
LOWEST LEMMA: straight beak shape

KERNEL: white, medium size, medium length and width, broad elliptical shape, rounded cheek, medium length brush hairs, medium width and depth of crease
GERM: medium size, broad elliptical in shape

AGRONOMIC CHARACTERISTICS: good resistance to shattering
PASTRY AND BISCUIT QUALITY: good

DISEASE REACTION: moderately resistant to Stripe Rust (Puccinia striiformis), moderately resistant to Kernal Black Point (principally caused by Alternaria alternata) and Leaf Rust (Puccinia triticina), susceptible to Loose Smut (Ustilago tritici) and Fusarium Head Blight (Fusarium graminearum, Fusarium species), highly susceptible to Stem Rust (Puccinia graminis f. sp. tritici)

Origin & Breeding History: 'AAC Indus' (experimental designation SWS427) was derived from the cross 'Sadash' / 'SWS340' conducted in 2004 at the Agriculture and Agri-Food Canada Lethbridge Research Centre, Lethbridge, Alberta using a modified bulk breeding technique. F1 plants were increased in the greenhouse and F2 heads grown out in Vauxhall, Alberta in 2005. F3 heads were selected from bulk plots and were grown out in Lethbridge in 2006 followed by the selections of 30 F4 headrows which were grown in Lincoln, New Zealand in 2006-2007. In 2007, five F5 bulk plots were grown in Lethbridge and Vauxhall with heads selected from the Lethbridge site only. Based on agronomic traits, twenty-nine F6 head rows were selected and grown in Lincoln, New Zealand during the winter of 2007-2008. In 2008, one F7 line was grown in a preliminary yield trial in Lethbridge and, based on its agronomic performance, was evaluated in an A-level test in 2009 and grown in Lethbridge, Vauxhall and Bow Island, Alberta. In 2010, it was advanced to a soft white B test at four locations throughout Alberta. Based on its quality evaluation, 'AAC Indus' was entered in the Soft White Spring Wheat Cooperative Registration trial and evaluated as SWS427 from 2011-2013.

Tests & Trials: Tests and trials were conducted during the 2014 and 2015 growing seasons at the Agriculture and Agri-Food Canada Lethbridge Research Centre in Lethbridge, Alberta. Plots consisted of 4 rows per plot with a row length of 3.0 metres and a row spacing of 23 cm. There were 3 replicates arranged in a RCB design. Measured characteristics were based on a minimum of 20 measurements per variety per year. Mean differences were significant at the 5% confidence probability level based on a paired Student's t-test.

Comparison tables for 'AAC Indus' with reference varieties 'Sadash' and 'AC Andrew'

Days to heading

Plant height (including awns) (cm)

Spike length (cm)

Click on image for larger view

Wheat: 'AAC Indus' (top) with reference varieties 'Sadash' (centre) and 'AC Andrew' (bottom)