CDC Lophy-I

Barley

Denomination: 'CDC Lophy-I'
Previously Proposed Denomination: 'HB379'
Botanical Name: Hordeum vulgare
Applicant/Holder: University of Saskatchewan
Crop Development Centre
4D36 Agriculture Building, 51 Campus Drive
Saskatoon, Saskatchewan
S7N 5A8
Canada
Breeder: Brian Rossnagel, University of Saskatchewan, Saskatoon, Saskatchewan
Agent in Canada: FP Genetics Inc.
426 McDonald Street
Regina, Saskatchewan
S4N 6E1
Canada
Tel: 306-791-1045 x.223
Application Date: 2006-05-05
Application Number: 06-5470
Date Withdrawn: 2010-05-28

Variety Description

Varieties used for comparison: 'CDC Freedom', 'CDC McGwire' and 'CDC Dolly'

Summary: 'CDC Lophy-I' has stronger pubescence on the flag leaf blade than 'CDC Dolly'. The intensity of the anthocyanin colouration of the auricles of the flag leaf of 'CDC Lophy-I' is weaker than in 'CDC Dolly'. 'CDC Lophy-I' has a longer spike excluding the awns than 'CDC Dolly'. The plant height of 'CDC Lophy-I' is taller than 'CDC Dolly' but shorter than 'CDC McGwire'. 'CDC Lophy-I' has weaker anthocyanin colouration of the nerves of the lemma than 'CDC Dolly'. 'CDC Lophy-I' has a hulless kernel while 'CDC Dolly' does not. The spiculation of inner lateral nerves of the dorsal side of the lemma of 'CDC Lophy-I' is weaker than in 'CDC Freedom'. 'CDC Lophy-I' has better lodging resistance than 'CDC McGwire' and 'CDC Dolly'. The resistance to True loose Smut in 'CDC Lophy-I' is better than the reference varieties.

Description:

PLANT: two row, low phytate spring feed barley, semi-erect to intermediate juvenile growth habit, green coleoptile, absent to very sparse pubescence on the sheaths of the lower leaves, intermediate growth habit

FLAG LEAF: low to medium frequency of plants with recurved flag leafs, medium to dense pubescence on blade, strong glaucosity on sheath, absent to very sparse pubescence on the sheath, medium anthocyanin colouration of auricles, very sparse to sparse pubescence on the margins of the auricles

SPIKE: mid-season spike emergence, mainly platform shaped collar, medium to strong anthocyanin colouration of the tips of the lemma awns, erect to semi-erect attitude, medium to strong glaucosity, parallel shape, medium to dense density, parallel to weakly divergent attitude of sterile spikelet, medium length of first segment of rachis, medium to strong curvature of first segment of rachis, the length of the glume and its awn of the median spikelet is equal relative to the grain, the lemma awns are equal to slightly longer relative to the spike, lemma awns have spiculations over one-half to two-thirds

KERNEL: weak anthocyanin colouration of nerves of the lemma at beginning of ripening, whitish to weakly coloured aleurone layer, husk absent, long rachilla hair, weak spiculation of inner lateral nerves of dorsal side of lemma, no hairiness on ventral furrow, strong clasping disposition of lodicules, mainly incomplete horseshoe shape of basal markings, medium to long length, medium to wide width

DISEASE REACTION: resistant to True Loose Smut (Ustilago nuda), moderately resistant to False Loose Smut, Black semi-loose Smut (Ustilago nigra) and Net Blotch (Pyrenophora teres), moderately susceptible to Spot Blotch (Cochliobolus sativus) and Common Root Rot (Cochliobolus sativus, Fusarium spp.), susceptible to Stem Rust (Puccinia graminis), Fusarium Head Blight (Fusarium graminearum; perfect state Gibberella zeae) and Covered Smut (Ustilago hordei), very susceptible to Scald (Rhynchosporium secalis) and Septoria speckled leaf blotch (Septoria passerinii)

AGRONOMY: good resistance to lodging and shattering, good tolerance to straw and neck breaking, fair to good tolerance to drought

Origin & Breeding History: 'CDC Lophy-I' (experimental number HB379) was developed using the pedigree breeding method at the Crop Development Centre, University of Saskatchewan, Saskatoon, Saskatchewan. It originates from the initial cross M2-635 x 'CDC Freedom' followed by backcrossing to 'CDC Freedom' 4 times with the final backcross occurring in 2000. Selection criteria included 75% phytate reduction, good yield potential, straw strength, early maturity, disease resistance and grain quality including good threshability and large grain size. The BC4F1 generation was increased during the winter of 2000/2001 in a New Zealand nursery with the resulting BC4F2 grown in the field in Saskatoon, Saskatchewan in the summer of 2001. The BC4F3 generation was advanced during the winter of 2001 and summer of 2002 in greenhouses in Saskatoon, Saskatchewan. 'HB379' was grown and selected as a single BC4F4 hill plot in Saskatoon, Saskatchewan in 2002. The seed from that BC4F4 plant was bulked to form the line. The line was increased in a New Zealand winter nursery in 2002 and 2003. The line was tested in CDC yield trials in 2003 and 2004 as SR03044 followed by testing in the Western Hulless Barley Coop Trials as HB379 during 2004 and 2005.

Tests & Trials: Tests and trials occurred during the summers of 2006 and 2008 in Saskatoon, Saskatchewan. The plots consisted of 5 rows with a row length of 3.7 metres and a row spacing of 20 cm. There were 2 replicates arranged in an RCB design.


Comparison tables for 'CDC Lophy-I' with reference varieties 'CDC Freedom', 'CDC McGwire' and 'CDC Dolly'

Spike length (cm)

  'CDC Lophy-I' 'CDC Freedom' 'CDC McGwire' 'CDC Dolly'
mean 2006 10.34 8.89 8.82 7.54
std. deviation 0.89 0.61 0.57 0.55
mean 2008 10.26 10.53 9.82 8.02
std. deviation 0.78 1.18 1.12 1.26

Plant height (cm)

  'CDC Lophy-I' 'CDC Freedom' 'CDC McGwire' 'CDC Dolly'
mean 2006 87.15 88.45 90.35 82.40
std. deviation 3.25 3.02 2.25 3.38
mean 2008 70.55 81.00 80.40 64.30
std. deviation 3.87 4.45 3.07 3.26

Click on image for larger view
CDC Lophy-I
Barley: 'CDC Lophy-I' (far right) with reference varieties 'CDC Dolly' (far left), 'CDC Freedom' (centre left) and 'CDC McGwire' (centre right)

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