AAC NRG097

Wheat

Variety Description

Varieties used for comparison: '5700PR', 'CDC NRG003' and 'NRG010'

Summary: The coleoptile of 'AAC NRG097' has medium intensity of anthocyanin colouration whereas 'CDC NRG003' and 'NRG010' have absent or very weak intensity. The flag leaves of 'AAC NRG097' are longer than those of '5700PR' and shorter than those of 'CDC NRG003'. The flag leaves of 'AAC NRG097' are wider than those of 'CDC NRG003'. At maturity, the plants of 'AAC NRG097' are taller than those of '5700PR'. The spikes of 'AAC NRG097' are shorter than those of 'NRG010'. The awns of 'AAC NRG097' are white whereas those of '5700PR' are light brown. The awns at the tip of the spike of 'AAC NRG097' are longer than those of 'NRG010'. The spike attitude of 'AAC NRG097' is inclined whereas it is nodding in 'NRG010'.

Description:

PLANT: common medium red spring type, intermediate growth habit at the 5 to 9 tiller stage, heads emerge mid-season, matures mid-season

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

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

CULM NECK: medium to strong glaucosity, straight
STRAW: thin pith in cross section

SPIKE: medium glaucosity, parallel-sided shape in profile, medium density, tan at maturity, inclined attitude, absent or very sparse hairiness of convex surface of apical rachis segment
AWNS: equal to length of spike, white
LOWER GLUME SHOULDER: narrow to medium width, straight to elevated shape
LOWER GLUME BEAK: short to medium length, straight

KERNEL: medium red colour

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

Origin & Breeding History: 'AAC NRG097' (experimental designation 'GP097', 'C0503-HY*02') is derived from the cross 'HY485' / 'HY669' // '5700PR' made in 2005 at the Semiarid Prairie Agricultural Research Centre of Agriculture and Agri-Food Canada, Swift Current, Saskatchewan. The F1 was multiplied at the Plant and Food Research Centre, Lincoln, New Zealand. About 15,000 F2 seeds were inoculated with Common Bunt and planted in a rust epiphytotic nursery. Disease-free, strong straw and early maturing individual plants were selected, threshed and assessed for kernel characteristics. Seed of the F3 lines was grown in a contra-season nursery in New Zealand where selections were made based on relative maturity, plant height and straw strength. In the F4 generation, seed of the selected F3 lines was inoculated with Common bunt and grown in an epiphytotic nursery where lines were selected which expressed resistance to Common bunt, leaf rust and stem rust. Heads were threshed individually and examined for seed attributes. The F5 bulks grown out in New Zealand and selections were made and harvested individually on a row basis. F6 and F8 lines were planted and screened in various locations in Western Canada (Swift Current, Indian Head and Lethbridge) and assessed for agronomic performance and disease resistance characteristics. The F5 and F7 generations were grown in nurseries in New Zealand. Selected F8 lines were screened for resistance to mixtures of Loose smut and Common bunt. In 2010, the experimental line C0503-HY*02 was evaluated in the high Yield Wheat 'B' test and was entered in the General Purpose Cooperative tests from 2011 and 2012 as 'GP097'.

Tests & Trials: Tests and trials were conducted at the Semiarid Prairie Agricultural Research Centre, Swift Current, Saskatchewan in 2012 and 2013. 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.

Comparison tables for 'AAC NRG097' with reference varieties '5700PR', 'CDC NRG003' and 'NRG010'

Flag leaf length (cm)

Flag leaf width (mm)

Plant height (including awns) (cm)

Spike length (excluding awns) (mm)

Length of awns at tip of spike (mm)

Click on image for larger view

Wheat: 'AAC NRG097' (top left) with reference varieties '5700PR' (top right), 'CDC NRG003' (bottom left) and 'NRG010' (bottom right)