CDC Maverick
| Denomination: | 'CDC Maverick' |
|---|---|
| Botanical Name: | Hordeum vulgare |
| Applicant/Holder: |
University of Saskatchewan Crop Development Centre 4D36 Agriculture Building, 51 Campus Drive Saskatoon, Saskatchewan S7N 5A8 Canada |
| Breeder: |
Aaron Beattie, University of Saskatchewan, Saskatoon, Saskatchewan |
| Application Date: | 2012-01-20 |
| Application Number: | 12-7476 |
| Grant of Rights Date: | 2013-11-26 |
| Certificate Number: | 4653 |
| Grant of Rights Termination Date: | 2031-11-26 |
Variety Description
Varieties used for comparison: 'CDC Cowboy' and 'AC Metcalfe'
Summary: 'CDC Maverick' has a medium to strong intensity of anthocyanin colouration of the auricles of the flag leaf whereas 'AC Metcalfe' has weak to medium intensity. The pubescence on the flag leaf blade is sparse to medium for 'CDC Maverick' whereas it is medium to dense for 'AC Metcalfe'. 'CDC Maverick' has a longer flag leaf at booting than 'AC Metcalfe' but shorter than 'CDC Cowboy'. The anthocyanin colouration of the nerves of the lemma are medium for 'CDC Maverick' whereas it is absent or very weak for 'AC Metcalfe'. At the beginning of ripening, the plant height, which includes the awns, of 'CDC Maverick' is taller than 'AC Metcalfe'. 'CDC Maverick' has a longer spike, excluding the awns, than 'AC Metcalfe'. The spiculation on the margins of the lemma awns is smooth for 'CDC Maverick' whereas it is rough for the reference varieties. 'CDC Maverick' has short rachilla hairs on the kernel whereas they are long for 'AC Metcalfe'. 'CDC Maverick' has a greater 1000 kernel weight than 'AC Metcalfe'. 'CDC Maverick' is susceptible to True Loose Smut (Ustilago nuda) whereas 'AC Metcalfe' is resistant.
Description:
PLANT: two row, spring forage-type general purpose barley, semi-erect growth habit at tillering, absent or very sparse pubescence on the lower leaf sheaths
FLAG LEAF (AT BOOTING): low to medium frequency of plants with recurved flag leaves, sparse to medium pubescence on blade
AURICLES: medium to strong intensity of anthocyanin colouration, weak pubescence on the margins
FLAG LEAF SHEATH: strong glaucosity, very sparse to sparse pubescence
SPIKE: early emergence, medium glaucosity, semi-erect attitude, platform collar shape, parallel sided shape, medium density, the sterile spikelet attitude is divergent, glume and awn of the median spikelet is longer than the grain, medium anthocyanin colouration of the nerves of the lemma of the kernel
FIRST SEGMENT OF RACHIS: short to medium length, weak to medium curvature
LEMMA AWNS: weak intensity of anthocyanin colouration of the tips, equal to longer than the length of the spike, smooth spiculations on margins
KERNEL: whitish aleurone layer, short rachilla hairs, husk present, very weak to weak spiculation of inner lateral nerves of dorsal side of lemma, hairiness of ventral furrow absent, clasping disposition of lodicules, horseshoe to incomplete horseshoe shape of basal markings, medium to long, medium width
AGRONOMIC CHARACTERISTICS: fair to good resistance to lodging, good resistance to shattering, good tolerance to straw breakage, fair to good tolerance to drought
DISEASE REACTION: susceptible to True Loose Smut (Ustilago nuda)
Origin & Breeding History: 'CDC Maverick' (experimental designations FB205 & SB060176) was derived from a cross between FB203 / 'CDC Cowboy' during the winter of 2001/2002 at the Crop Development Centre, University of Saskatchewan using a pedigree breeding system. FB203 = 'Falcon' / SB93964 and 'CDC Cowboy' = TR320 / SB91709. The F1 through F5 generations were grown as bulk populations with the F2 and F4 grown in winter nurseries in New Zealand. 'CDC Maverick' was grown and selected as a single F5 derived F6 row plot at Saskatoon in 2004. The seed was harvested and bulked as the line SB060176. 'CDC Maverick' was tested in CDC yield trials in 2006-2008 followed by testing in the Western Canadian Forage Cooperative Registration Trials as FB205 during 2009-2010. The selection criteria used in developing 'CDC Maverick' included smooth awns, high forage yield combined with good forage quality, good physical kernel quality characterized by high test weight and plump grain, early maturing, strong straw and resistance to surface-borne smuts and stem rust.
Tests & Trials: Tests and trials were conducted during the 2011 and 2012 growing seasons in Saskatoon, Saskatchewan. Plots consisted of 5 rows with a row length of 3.66 metres and a row spacing of 20 cm. There were 3 replicates arranged in a RCB design. Measured characteristics were based on 20 measurements each year.
Comparison tables for 'CDC Maverick' with reference varieties 'CDC Cowboy' and 'AC Metcalfe'
Flag leaf length at booting (cm)
| 'CDC Maverick' | 'CDC Cowboy' | 'AC Metcalfe' | |
|---|---|---|---|
| mean 2011 | 13.46 | 14.61 | 10.84 |
| std. deviation | 1.87 | 1.40 | 1.70 |
| mean 2012 | 11.47 | 13.97 | 9.43 |
| std. deviation | 1.84 | 1.90 | 1.83 |
Plant height (including awns) at beginning of ripening (cm)
| 'CDC Maverick' | 'CDC Cowboy' | 'AC Metcalfe' | |
|---|---|---|---|
| mean 2011 | 111.25 | 112.65 | 90.80 |
| std. deviation | 3.65 | 4.55 | 3.47 |
| mean 2012 | 92.9 | 97.4 | 72.8 |
| std. deviation | 4.39 | 5.38 | 3.93 |
1000 kernel weight (grams)
| 'CDC Maverick' | 'CDC Cowboy' | 'AC Metcalfe' | |
|---|---|---|---|
| mean 2011 | 56.8 | 52.3 | 45.1 |
| mean 2012 | 56.7 | 55.0 | 43.1 |
Click on image for larger view
Barley: 'CDC Maverick' (centre) with the reference varieties 'CDC Cowboy' (left) and 'AC Metcalfe' (right)
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