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Denomination: 'Chigwell'
Previously Proposed Denomination: 'BT577'
Botanical Name: Hordeum vulgare
Applicant/Holder: Alberta Agriculture and Irrigation
Crop Assurance and Rural Programming Branch
1st Floor, 7000-113 Street
Edmonton, Alberta
T6H 5T6
Breeder: Joseph Nyachiro, Alberta Agriculture and Forestry, Lacombe, Alberta
Agent in Canada: SeCan Association
400-300 Terry Fox Drive
Kanata, Ontario
K2K 0E3
Tel: 613-592-8600 ext.223
Application Date: 2008-05-05
Application Number: 08-6327
Grant of Rights Date: 2010-11-19
Certificate Number: 3968
Date rights surrendered: 2021-11-19

Variety Description

Varieties used for comparison: 'Sundre' and 'Vivar'

Summary: 'Chigwell' has a lower frequency of plants with recurved flag leaves than the reference varieties. 'Chigwell' has wider flag leaves than the reference varieties. The intensity of anthocyanin colouration of flag leaf auricle of 'Chigwell' is absent whereas it is weak for 'Vivar'. 'Chigwell' has a medium spike density whereas it is lax in 'Sundre'. The spike attitude of 'Chigwell' is semi-erect whereas it is horizontal in 'Sundre'. 'Chigwell' has a longer first segment of the rachis than 'Sundre'. The tips of the lemma awns in 'Chigwell' have a strong intensity of anthocyanin colouration whereas it is weak in 'Vivar'. 'Chigwell' has a weak curvature of first segment of rachis whereas 'Sundre' has no curvature and 'Vivar' has medium curvation. The plants of 'Chigwell' are taller than those of 'Vivar'. 'Chigwell' has shorther rachilla hair of the kernel than 'Sundre'. The spikes of 'Chigwell' are shorter than those of 'Sundre'.


PLANT: six row, spring feed barley, semi-erect juvenile growth habit, absent or very sparse pubescence on the sheaths of the lower leaves

FLAG LEAF: low frequency of plants with recurved flag leaves, weak pubescence
FLAG LEAF SHEATH: absent or very weak glaucosity, weak pubescence
AURICLES: very weak anthocyanin colouration, weak pubescence on the margins

SPIKE: mid-season spike emergence, platform shaped collar, strong anthocyanin colouration of the tips of the lemma awns, semi-erect attitude, absent or very weak glaucosity, tapering shape, medium density, the length of the glume and its awn of the median spikelet is longer relative to the grain
FIRST SEGMENT OF RACHIS: medium length, weak curvature
LEMMA AWNS: longer relative to the spike, semi-smooth spiculations on margins

KERNEL: strong anthocyanin colouration of nerves of the lemma at beginning of ripening, whitish aleurone layer, short rachilla hair, husk present, no hairiness on ventral furrow, medium length, medium width

AGRONOMY: good resistance to lodging, good resistance to shattering, good tolerance to straw breakage, fair tolerance to drought

Origin & Breeding History: 'Chigwell' (experimental designations BT577, H98075009, and FB418) was developed at the Field Crop Development Center, Lacombe, Alberta using a single seed descent system. It arose from the cross Mahigan/H87020005 in 1998. H98075009 was selected from the F5 generation to be advanced into yield trials. It was further tested as BT577 in the Western Six Row Barley Cooperative Test and as FB418 in the Western Forage Barley Coop. Selection criteria included grain yield, test weight, 1000 kernel weight, lodging resistance, disease resistance and maturity.

Tests & Trials: Tests and trials were conducted during the summers of 2008 and 2009 in Lacombe, Alberta. Plots consisted of 8 rows with a row spacing of 0.14 meters and a row length of 2.5 meters. There were 3 replicates.

Comparison tables for 'Chigwell' with reference varieties 'Sundre' and 'Vivar'

Spike length (cm)

  'Chigwell' 'Sundre' 'Vivar'
mean 2008 6 7.4 5.5
std. deviation 0.53 0.44 0.39
mean 2009 5.3 6.8 5.1
std. deviation 0.42 0.57 0.44

Flag leaf length (cm)

  'Chigwell' 'Sundre' 'Vivar'
mean 2008 15 18.2 13.6
std. deviation 1.52 1.93 2.21
mean 2009 10 12.1 9.6
std. deviation 1.05 1.51 1.27

Flag leaf width (mm)

  'Chigwell' 'Sundre' 'Vivar'
mean 2008 18 15.5 13.2
std. deviation 1.59 1.47 1.35
mean 2009 13.1 15.5 11.2
std. deviation 1.28 0.77 1.01

Plant height (cm)

  'Chigwell' 'Sundre' 'Vivar'
mean 2008 92.95 94.75 90.25
std. deviation 3.46 3.43 3.8
mean 2009 57.4 62.65 48.2
std. deviation 4.03 2.16 3.04

Click on image for larger view
Barley: 'Chigwell' (centre) with reference varieties 'Sundre' (left) and 'Vivar' (right)

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