AAC GoldNet

Wheat

Variety Description

Varieties used for comparison: 'AAC Spitfire', 'AAC Durafield', 'Strongfield' and 'Transcend'

Summary: At booting, the flag leaf of 'AAC GoldNet' is wider than that of 'Transcend'. At maturity, the plants of 'AAC GoldNet' are taller than the plants of 'AAC Spitfire' and 'Strongfield' and shorter than those of 'Transcend'. Excluding the awns, the spike of 'AAC GoldNet' is longer than the spikes of 'AAC Spitfire', 'AAC Durafield', and 'Strongfield'. The lower glume for 'AAC GoldNet' is longer than those of 'AAC Durafield' and 'Strongfield'. The lower glume for 'AAC GoldNet' is wider than that of 'AAC Durafield'. The kernel brush hairs are short for 'AAC GoldNet' while they are of medium length for 'AAC Durafield' and 'Transcend'. The kernel crease is of a medium depth for 'AAC GoldNet' while it is shallow for 'AAC Spitfire'.

Description:

PLANT: durum wheat, spring type, semi-erect growth habit at the 5 to 9 tiller stage, high frequency of plants with recurved flag leaves, heads mid-season

SEEDLING (4 LEAF STAGE): strong to very strong intensity of anthocyanin colouration of coleoptile, glabrous sheath and blade of lower leaves

FLAG LEAF: absent or very weak intensity of anthocyanin colouration of auricles, medium to strong degree of glaucosity of sheath, absent or very weak degree of glaucosity of lower side, glabrous blade and sheath

CULM: absent or very sparse hairiness of uppermost node, medium to strong degree of glaucosity, curved neck
STRAW (AT MATURITY): thin pith in cross-section, no anthocyanin colouration

SPIKE: medium degree of glaucosity at heading, tapering or fusiform sided shape in profile, medium to dense, off-white at maturity, erect attitude
AWNS: longer than spike, white at maturity
LOWER GLUME: medium oblong in shape, medium to long length, medium width, glabrous
LOWER GLUME SHOULDER: absent or very narrow to narrow, elevated shape to strongly elevated with a second point
LOWER GLUME BEAK: short to medium length, straight to slightly curved shape
LOWEST LEMMA: straight to slightly curved beak

KERNEL: amber, large, long, medium width, elliptical shape, rounded cheek, short brush hairs, narrow crease, medium depth of crease
GERM: medium sized, oval shape

AGRONOMIC CHARACTERISTICS: good resistance to shattering, good tolerance to drought

PASTA QUALITY: good

DISEASE REACTIONS : resistant to Leaf rust (Puccinia recondita), Stripe rust (Puccinia striiformis) and Common bunt (Tilletia caries, Tilletia foetida); moderately resistant to Stem rust (Puccinia graminis f. sp. tritici); susceptible to Fusarium head blight (Fusarium graminearum, Fusarium species)

Origin & Breeding History: 'AAC GoldNet' (experimental designations DT887 and A1028-HV05) originated from the cross between DT838/A0506&AJ039 and 'Transcend' conducted in 2010 at the Agriculture and Agri-Food Canada Swift Current Research and Developmental Centre in Swift Current, Saskatchewan. The F1 generation was increased in a greenhouse in 2010 and the F2 generation space planted in a disease epiphytotic field nursery near Swift Current in 2011. In 2011-2012, F3 seeds, from 302 individual F2 plants were grown in rows near Lincoln, New Zealand. The resulting F4 seed, from 151 selected F3 lines, were grown in unreplicated four-row plot agronomic trials under dryland conditions near Swift Current and Regina, Saskatchewan in 2012. F3 selection was based on plant height, straw strength and maturity. From the agronomic trials, 23 F4 families, each composed of 7 F5 lines per family, were selected based on agronomic performance, quality testing and disease reaction. The F5 lines were grown as head rows near Leeston, New Zealand and further selected on the basis of plant height, straw strength and maturity. In 2013, 46 selected F6 lines were grown in four-row plots under dryland conditions near Swift Current and Saskatoon, Saskatchewan and under irrigated conditions at Lethbridge, Alberta. Selections from the F6 lines, based on agronomic performance, quality traits and disease resistance, resulted in the identification of the line A1028-HV05, which met all criteria. A1028-HV05 was tested in the Durum A5 test in 2014 and in the Durum-B test in 2015. Disease reaction was assessed at various locations in Saskatchewan and Manitoba while quality assessments were performed at Agriculture and Agri-Food Canada`s Central Quality Laboratory in Winnipeg, Manitoba. A1028-HV05 was entered in the Durum registration trials from 2016 to 2018 as DT887.

Tests & Trials: The comparative trials for 'AAC GoldNet' were conducted at the Agriculture and Agri-Food Canada Swift Current Research and Developmental Centre in Swift Current, Saskatchewan during the 2018 and 2019 growing seasons. Plots consisted of four replications arranged in a RCB design with each plot consisting of 4 rows with a row length of 3 metres and row spacing of 23 cm. The planting density was 270 plants per metre squared per variety, per year. Measured characteristics were based on 20 measurements per variety, per year except kernel weight, which was based on 4 measurements per variety, per year. Mean differences were significant at the 5% confidence probability level based on LSD values. Disease reaction ratings were provided through the Disease Evaluation team of the Prairie Recommending Committee for Wheat, Rye and Triticale and Prairie Grain Development Committee from trials conducted in 2016, 2017 and 2018.

Comparison tables for 'AAC GoldNet' with reference varieties 'AAC Spitfire', 'AAC Durafield', 'Strongfield' and 'Transcend'

Flag leaf width (mm)

Plant height at maturity (including awns) (cm)

Spike length (excluding awns) (cm)

Lower glume length (mm)

Lower glume wifth (mm)

Click on image for larger view

Wheat: 'AAC GoldNet' (left) with reference varieties 'AAC Spitfire' (centre left), 'AAC Durafield' (centre), 'Strongfield' (centre right) and 'Transcend' (right)

Click on image for larger view

Wheat: 'AAC GoldNet' (left) with reference varieties 'AAC Spitfire' (centre left), 'AAC Durafield' (centre), 'Strongfield' (centre right) and 'Transcend' (right)