Shaw

Wheat

Variety Description

Varieties used for comparison: 'Harvest' and 'AC Barrie'

Summary: The flag leaves of 'Shaw' are longer than those of both reference varieties. The flag leaves of 'Shaw' are wider than those of 'Harvest' and narrower than those of 'AC Barrie'. The plants of 'Shaw' head later than those of 'Harvest'. At maturity, the plants of 'Shaw' are taller than both reference varieties. The spike of 'Shaw' is longer than that of 'Harvest'. The spike of 'Shaw' is white at maturity whereas it is tan coloured on 'Harvest'. The lower glume of 'Shaw' is short with a medium to broad shoulder whereas the lower glume of 'AC Barrie' is medium in length with a narrow to medium width shoulder. 'Shaw' is resistant to current races of leaf rust (Puccinia triticina) whereas 'AC Barrie' is susceptible. 'Shaw' is susceptible to loose smut (Ustilago tritici) whereas 'AC Barrie is resistant. 'Shaw' is resistant to Orange Blossom Wheat Midge (Sitodiplosis mosellana) whereas the reference varieties are susceptible.

Description:

PLANT: spring type, medium intensity of anthocyanin colouration of coleoptile
SEEDLING (at four leaf stage): pubescence on lower leaf sheath and blade

GROWTH HABIT (at 5-9 tiller stage): semi-erect
FLAG LEAF (at booting): high frequency of plants with recurved flag leaves, no anthocyanin colouration on auricles, weak to medium glaucosity on sheath, no pubescence on blade and sheath

SPIKE: weak glaucosity, semi-clavate, medium density, white in colour with inclined attitude at maturity, very sparse hairiness of convex surface of apical rachis segment
CULM: weak to medium glaucosity
STRAW: thin pith in cross section, no anthocyanin colouration at maturity
AWNS: awnlets present, moderately spreading attitude, white colour

LOWER GLUME: short, medium width, pubescent, very sparse internal hairs
LOWER GLUME SHOULDER: medium to broad, slightly sloping to straight
LOWER GLUME BEAK: very short, very slightly curved
LOWEST LEMMA: slightly curved beak

KERNEL: hard red, medium red, small to medium size, short to medium length, medium width, oval shape, angular cheek, medium length brush hairs, medium size round germ, narrow to medium width crease with very shallow depth

PERFORMANCE CHARACTERISTICS: good resistance to shattering, good bread making quality,

DISEASE REACTION: resistant to Leaf rust (Puccinia triticina), Stem rust (Puccinia graminia f.sp.tritici) and Common bunt (Tilletia caries, Tilletia foetida), susceptible to Loose smut (Ustilago tritici) and Fusarium head blight (Fusarium graminearum, Fusarium species)

INSECT REACTION: resistant to Orange Blossom Wheat Midge (Sitodiplosis mosellana)

Origin & Breeding History: 'Shaw' was derived from the cross, 'Harvest' (BW259)/BW313 (RL4979) made in 2001, and is one of 218 double haploids produced for this cross at the Agriculture & Agri-Food Canada Cereal Research Centre, Winnipeg, Manitoba in 2002. A doubled haploid line identified as BA51*B92 was increased at a contra season nursery in New Zealand in 2002-2003. In summer 2003, BA51*B92 was tested in a one location, single replicate yield test with associated disease nurseries to evaluate resistance to leaf rust, stem rust and Fusarium head blight. Following two years of testing in multi-location yield trials in 2004 and 2005, BA51*B92 was entered in the Central Bread Wheat Coop in 2006. At that time, a midge susceptible refuge line, BA51*C222, was added to form BW394. The refuge represented 10% of the seed forming BW394.

Tests & Trials: The tests and trials used to described the morphology for 'Shaw' were conducted in Portage la Prairie, Manitoba during the 2008 and 2009 growing seasons. A 4 replicate RCB design was planted with each replicate consisting of 5 rows, measuring 4.3 metres in length, spaced 0.15 metres between rows and seeded at a rate of 269 seeds/square metre. Measured characteristics were based on a mean of two years, with 20 measurements recorded each year.

Comparison tables for 'Shaw' with reference varieties 'Harvest' and 'AC Barrie'

Flag leaf length (cm)

Flag leaf width (mm)

Days to heading

Plant height (cm)

Spike length (cm)

Click on image for larger view

Wheat: 'Shaw' (centre) with reference varieties 'AC Barrie' (left) and 'Harvest' (right)