The effect of temperature, seed colour and linolenic acid concentration on germination and seed vigour in flax

1999 ◽  
Vol 79 (3) ◽  
pp. 315-319 ◽  
Author(s):  
G. Saeidi ◽  
G. G. Rowland
Keyword(s):  
Linolenic Acid ◽  
Acid Concentration ◽  
Negative Impact ◽  
Effect Of Temperature ◽  
Seed Colour ◽  
Seed Vigour ◽  
Yellow Seed ◽  
Low Linolenic Acid ◽  
Effects Of Temperature ◽  
Low Linolenic

In Canada, the edible-oil type of flax (Linum usitatissimum) known as solin must have a linolenic acid concentration of less than 5% and a yellow seed colour. The yellow seed distinguishes solin from regular, high-linolenic acid linseed flax. Both altered fatty acid ratios and seed colour can have a negative impact on seed germination. The effects of temperature, seed colour and seed linolenic acid concentration on germination and seed vigour were studied in four populations that were near-isogenic for seed colour and linolenic acid level. For all populations, a germination temperature of 5 °C resulted in a significantly lower germination than at 10 or 15 °C. With one exception at 5 °C, where yellow seed had a greater germination than brown seed, there was no difference in germination frequency between brown and yellow seed. Also, there was no difference in germination between low and high linolenic acid seed with the exception of one population where low linolenic acid seeds had lower germination at 5 °C. In vigour tests however, yellow seed had lower seed vigour than brown seed in all populations. Low linolenic acid seeds had lower seed vigour than high linolenic acid seed in one population. Selection for seed vigour is essential in the breeding of solin varieties. Key words: Seed colour, linolenic acid, germination, seed vigour, flax

2090 low linolenic acid flax

2004 ◽  
Vol 84 (3) ◽  
pp. 797-799 ◽  
Author(s):  
J. C. P. Dribnenki ◽  
S. F. McEachern ◽  
Y. Chen ◽  
A. G. Green ◽  
K. Y. Rashid
Keyword(s):  
Linolenic Acid ◽  
Growing Season ◽  
Black Soil ◽  
High Yield ◽  
Yellow Seed ◽  
Cultivar Description ◽  
Low Linolenic Acid ◽  
Low Linolenic ◽  
Yellow Seed Coat ◽  
Moderately Resistant

2090 was developed by Agricore United. 2090 combines very high oil content with high yield. In the longer growing season Black soil zones of western Canada, the yield of 2090 is similar to 2047 and higher than 1084. In the shorter growing season Black and Grey-wooded soil zones, 2090 is similar yielding to 2047 and 1084. In the Brown and Dark Brown soil zones, the yield of 2090 is higher than 2047 and 1084. It is immune to North American races of rust, is moderately resistant to Fusarium wilt and is moderately resistant to powdery mildew. 2090, 2047 and 1084 are low linolenic acid, yellow seed coat solin cultivars. Key words: Flax, low linolenic acid, cultivar description, solin

Seed colour and linolenic acid effects on agronomic traits in flax

1999 ◽  
Vol 79 (4) ◽  
pp. 521-526 ◽  
Author(s):  
G. Saeidi ◽  
G. G. Rowland
Keyword(s):  
Linolenic Acid ◽  
Seed Yield ◽  
Seed Coat ◽  
Coat Colour ◽  
Seed Colour ◽  
Seed Vigour ◽  
Yellow Seed ◽  
Industrial Oil ◽  
Oil Concentration ◽  
Field Emergence

Solin flax (Linum usitatissimum L.) is an edible-oil crop that must have less than 5% linolenic acid in its seed oil and a yellow seed coat. Seed vigour of solin is often lower than that of brown-seeded linseed flax and this lower seed vigour has been associated with both seed colour and linolenic acid levels. To evaluate the agronomic affect of this relationship, paired near-iso-genic populations of flax differing in seed coat colour and linolenic acid concentration were selected from different crosses and sown in field trials at the Kernen Crop Research Farm, University of Saskatchewan in 1995 and 1996. Seed with brown seed coat colour had higher field emergence and seed yield than yellow-seeded types. However, emergence differences did not contribute to this seed yield variation. Maturity was not affected by seed colour but yellow seed had greater seed oil concentration and mechanical seed coat damage than brown seed. Low linolenic acid seed (2%), compared with high linolenic seed (50%), had lower field emergence in 1995, were later maturing and had higher seed yield. Linolenic acid concentration had no significant effect on oil concentration and seed damage from mechanical harvesting. Solin types had lower field emergence than industrial oil types. There was no difference for seed yield, oil concentration and seed weight between solin and industrial oil types. Solin seed was slightly later maturing and had greater seed coat damage than industrial seed in some genetic backgrounds. Key words: Seed colour, linolenic acid, emergence, seed damage, flax

Independent effects of dietary linoleic and linolenic fatty acids on the conjugated linoleic acid content of cows’ milk

2002 ◽  
Vol 74 (1) ◽  
pp. 163-176 ◽  
Author(s):  
A.L. Lock ◽  
P.C. Garnsworthy
Keyword(s):  
Fatty Acids ◽  
Mammary Gland ◽  
Linoleic Acid ◽  
Conjugated Linoleic Acid ◽  
Linolenic Acid ◽  
Milk Fat ◽  
Latin Square ◽  
Health Benefit ◽  
Low Linolenic Acid ◽  
Low Linolenic

AbstractIt may be desirable to increase the level of conjugated linoleic acid (CLA) in milk as a health benefit in human nutrition. The purpose of this work was to separate the effects of linoleic and linolenic acids on CLA production in dairy cows and to determine to what extent endogenous synthesis contributes to cis-9, trans-11 CLA concentration in milk fat. Eight lactating cows and four non-lactating duodenal fistulated cows were used in a 4 ✕ 4 Latin-square design. All cows received a basal diet of grass silage that was supplemented with one of four concentrates, which were designed to differ in their linoleic and linolenic acid contents. The oil components of the concentrates were produced from mixtures of olive, linseed, rape, soya and sunflower oils to produce the four treatments: low linoleic/ low linolenic acid (LL), low linoleic/high linolenic acid (LH), high linoleic/low linolenic acid (HL) and high linoleic/ high linolenic acid (HH). Milk cis-9, trans-11 CLA contents were 0·8, 0·9, 0·9 and 1·1 g/100 g fatty acid methyl esters (P < 0·05) and yields were 5, 7, 7 and 8 g/day (P < 0·05) for the LL, LH, HL and HH treatments, respectively. The yields of trans-C18:1 fatty acids in milk were 19, 22, 21 and 23 g/day (P < 0·05), respectively. Taking the data for the cis-9, trans-11 CLA content and flow of duodenal fluid from the fistulated cows and representing this in terms of dietary intake by the lactating animals, the amounts of cis-9, trans-11 CLA produced in the rumen were calculated to be 0·8, 0·9, 1·2 and 1·1 g/day (P < 0·05) and for trans-C18:1 fatty acids 58, 58, 66 and 69 g/day (P < 0·05). Increasing linoleic and/or linolenic acids in the diet can increase the cis-9, trans-11 CLA content of cows’ milk. Only diets high in linoleic acid increased cis-9, trans-11 CLA production in the rumen. On all four diets, more than 80% of cis-9, trans-11 CLA in milk was produced endogenously by Δ9-desaturase from trans-11 C18:1 in the mammary gland. Cows on the same diet have different milk fat cis-9, trans-11 CLA concentrations that may be partially explained by differences in Δ9-desaturase activity between cows. Increasing the activity of Δ9-desaturase in the mammary gland may offer greater potential for enhancing the cis-9, trans-11 CLA content of milk fat than increasing cis-9, trans-11 CLA production in the rumen.

Inheritance of Low Linolenic Acid Level in the Soybean Line RG10

Crop Science ◽  
1998 ◽  
Vol 38 (6) ◽  
pp. 1441-1444 ◽  
Author(s):  
Duška Stijšin ◽  
Bruce M. Luzzi ◽  
Gary R. Ablett ◽  
Jack W. Tanner
Keyword(s):  
Linolenic Acid ◽  
Acid Level ◽  
Soybean Line ◽  
Low Linolenic Acid ◽  
Low Linolenic ◽  
Linolenic Acid Level
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