CDC Sorrel

Flax

Variety Description

Varieties used for comparison: 'CDC Bethune' and 'Hanley'

Summary: 'CDC Sorrel' has a taller plant height and a longer main axis length than 'Hanley'. 'CDC Sorrel' has a shorter petal length than 'CDC Bethune'. 'CDC Sorrel' has filaments that are white at the top while both reference varieties are blue. The style on 'CDC Sorrel' has white at the top and light blue at the base while both reference varieties are blue at the top and bottom of the style. 'CDC Sorrel' has a white stigma while both reference varieties have a pale blue stigma. The capsules are medium in size for 'CDC Sorrel' and small for 'Hanley'. 'CDC Sorrel' has ciliation of the false septa while 'CDC Bethune' does not. 'CDC Sorrel' has medium brown seeds while 'Hanley' has brown seeds.

Description:

HYPOCOTYL: medium to strong anthocyanin colouration

FLOWER: flattened disk shape, medium size corolla, no longitudinal folding of petals, absent or very weak sepal dotting, medium blue petal, white filament, blue anthers, yellow pollen, style with white top and light blue base, white stigma

CAPSULE: medium size, early maturity, semi-dehiscent, ciliation of false septa present
SEED: medium brown, medium size

DISEASE RESISTANCE: immunity to Flax rust (Melampsora lini, Race 371), moderate resistance to Flax wilt (Fusarium oxysporum f.sp. lini)

PESTICIDE RESISTANCE: tolerant against Buctril M and clethodim (Centurion), susceptible to desiccation by Reglone

AGRONOMY: good resistance to shattering, good resistance to capsule loss, good resistance to lodging, low capability to produce basal branching

USE: oilseed flax variety

Origin & Breeding History: 'CDC Sorrel' was developed by the Crop Development Centre, University of Saskatchewan, Saskatoon, Saskatchewan. The cross between FP956 and 'Vimy' was made in the Phytotron of the College of Agriculture in 1993 and the F1 was raised in the Phytotron. FP956 arose from the cross NorLin/FP826 and was provided to the CDC by Dr. E.O. Kenaschuk. The F2 population was grown at the Kernen Crop Research Farm in 1994 and advanced using the pedigree system from the F3 (1995) through F5 (1997). Selection at each generation was primarily for vigour of stand, maturity, oil concentration and iodine value. From 1998 through 2001 the line was evaluated as F98210 in replicated yield trials in Saskatchewan. It was entered into the Flax Cooperative Test in 2002 as FP2141 and tested through to 2004.

Tests & Trials: Tests and trials were conducted in 2005 and 2006 in Saskatoon, Saskatchewan. The results from the 2006 trials were used for the description. Trials consisted of three entries in a randomized complete block design (RCBD) with 2 replications. There were 6 rows per plot, row length was 3.66 meters with 30.5 cm between rows (6.69 square meters). The 2006 trials were seeded on May 16 at a rate of 33.6 grams per plot (50kg/ha).

Comparison tables for 'CDC Sorrel' with reference varieties 'CDC Bethune' and 'Hanley'

Plant height (cm)

Plant main axis length (cm)

Flower petal length (mm)

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Flax: 'CDC Sorrel' (center) with reference varieties 'CDC Bethune' (left) and 'Hanley' (right)

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Flax: 'CDC Sorrel' (center) with reference varieties 'CDC Bethune' (left) and 'Hanley' (right)