A STUDY OF ERUCIC ACID ALLELES IN DIGENOMIC RAPESEED (Brassica napus L.)

1981 ◽  
Vol 61 (2) ◽  
pp. 198-202 ◽  
Author(s):  
I. J. ANAND ◽  
R. K. DOWNEY
Keyword(s):  
Fatty Acid ◽  
Brassica Napus ◽  
Erucic Acid ◽  
Direct Evidence ◽  
Brassica Campestris ◽  
Fatty Acid Analysis ◽  
Interspecific Crosses ◽  
Seed Oils ◽  
Brassica Napus L ◽  
Brassica Crops

Five genes have been identified in Brassica crops which control the level of synthesis of the fatty acid, erucic, in their seed oils. These genes, designated e, Ea, Eb, Ec, and Ed, act in an additive manner and result in erucic acid levels of < 1, 10, 15, 30 and 3.5, respectively. No direct evidence has yet been obtained to show that these genes are true alleles. Selected plants of the amphidiploid species Brassica napus L. with erucic acid contents of 7–8% and a genotype of EdEdee were reciprocally crossed with selected plants with erucic acid levels of [Formula: see text] and a genotype of Eaeee. Fatty acid analysis of F1 and backcross seed demonstrated that the genes Ed and Ea in the parents used were in the same genome and were truly allelic. Interspecific crosses were made between these B. napus parents and selected zero erucic acid plants of Brassica campestris L. (genotype "ee") to determine whether the genes Ed and Ea resided in the oleracea or the campestris genome of B. napus parents. Fatty acid analysis of F1 and backcross seed from these interspecific crosses suggest that the alleles of Ed and Ea are located on chromosomes of the oleracea genome.

INHERITANCE OF FATTY ACID COMPOSITION IN WINTER FORMS OF RAPESEED, BRASSICA NAPUS

1969 ◽  
Vol 49 (3) ◽  
pp. 313-319 ◽  
Author(s):  
J. Krzymanski ◽  
R. K. Downey
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Brassica Napus ◽  
Erucic Acid ◽  
Correlation Coefficients ◽  
Eicosenoic Acid ◽  
Fatty Acid Analysis ◽  
Long Chain Fatty Acids ◽  
Brassica Napus L ◽  
Winter Rapeseed

The transfer of the zero erucic acid characteristic from spring to winter rapeseed (Brassica napus L.) and the identification of a new allele determining the erucic acid level in rapeseed oil are reported. Fatty acid analysis of F2 seed from the cross zero × low (7%) erucic acid winter rapeseed parents supported the hypothesis that, in these strains, one gene pair governs the level of erucic acid, and that each, allele contributes approximately 3.5% erucic and 6% eicosenoic acid to the seed oil. Gene action is similar to other alleles in this series, in that the genes display no dominance and act in an additive manner. The long-chain fatty acids, erucic and eicosenoic, were each significantly negatively correlated with the 18 carbon fatty acids, oleic and linoleic. Within each of the three F2 genotypes, correlation coefficients between oleic and linoleic were also negative and significant.

THE INHERITANCE OF ERUCIC ACID CONTENT IN RAPESEED (BRASSICA NAPUS)

1964 ◽  
Vol 44 (1) ◽  
pp. 104-111 ◽  
Author(s):  
B. L. Harvey ◽  
R. K. Downey
Keyword(s):  
Fatty Acids ◽  
Brassica Napus ◽  
Genetic Analysis ◽  
Erucic Acid ◽  
Acid Content ◽  
Seed Oil ◽  
Brassica Campestris ◽  
Erucic Acid Content ◽  
Brassica Napus L ◽  
Backcross Populations

Genetic analysis of F2, F3, and backcross populations supported the hypothesis that erucic acid content in seed oil of plants of Brassica napus L. is governed by two genes displaying no dominance and acting in an additive manner. Environment appeared to influence erucic acid content, especially in genotypes capable of producing a large amount of this acid. Methods for the breeding of plants of Brassica campestris L. with zero erucic acid are outlined and it is suggested that similar methods could be used to breed for or against other fatty acids.

SELECTION OF RAPE PLANTS (BRASSICA NAPUS) WITH SEED OIL PRACTICALLY FREE FROM ERUCIC ACID

1964 ◽  
Vol 44 (4) ◽  
pp. 359-364 ◽  
Author(s):  
B. R. Stefansson ◽  
F. W. Hougen
Keyword(s):  
Brassica Napus ◽  
Erucic Acid ◽  
Acid Content ◽  
Major Constituent ◽  
Erucic Acid Content ◽  
Seed Oils ◽  
Brassica Napus L ◽  
Characteristic Component ◽  
Different Sources ◽  
Selection Of

Erucic acid is the major and characteristic component of common rapeseed oils. Seed oils from a total of 125 strains from three species of Brassica (B. napus L., B. campestris L., and B. juncea (L.) Coss.) grown near Winnipeg in 1959 were analysed for erucic acid content. The range of variability for this component was similar to the range of previously reported values. Analyses of seed oils from individual plants revealed a greater range of variability and repeated selection resulted in isolation of rape strains (Brassica napus L.) from two different sources with seed oils containing only traces of erucic acid. Oleic has replaced erucic acid as the major constituent of these oils. Analysis of F2 data indicated that inheritance of erucic acid content is conditioned by two independent gene loci and that the dosage effect of the genes is additive. Pollen source exerts a direct effect on the composition of the oil (xenia effect).

Chemical Constituents in Some Promising Genotypes of Indian Mustard [Brassica juncea (L.) Czern and Coss.]

2017 ◽  
Vol 4 (04) ◽  
Author(s):  
SUNITA SINGH ◽  
R. P. SINGH ◽  
H. K. SINGH ◽  
N. A. KHAN ◽  
M. K. MAURYA
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Erucic Acid ◽  
Brassica Juncea ◽  
Acid Composition ◽  
Chemical Constituents ◽  
Indian Mustard ◽  
Acid Value ◽  
Fatty Acid Analysis ◽  
Crude Fibre

Among the oilseed Brassica crops, Indian mustard [Brassica juncea (L.) Czern and Coss.] is an important source of oil from a nutritional point of view. The nutritional value of oil and cake quality is governed mainly by the composition of its fatty acids, iodine value, saponification, acid value, glucosinolates, crude fibre, protein and limiting amino acids, etc. Seventeen varieties/strains of Indian mustard were taken for saturated and unsaturated fatty acid analysis. The eicosenoic was absent in genotype (NUDBYJ-10) and erucic acid (NUDBYJ-10, LES-46 and Pusa mustard- 21). The fatty acid composition found a variable in different genotypes. Saturated fatty acid, Palmitic + Stearic ranged between 2.3 to 6.5%, Oleic 10.6 to 40.7%, Linoleic 16.1 to 37.7%, Linolenic 13.3 to 26.7%, Eicosenoic 0.00 to 10.30% and Erucic acid 0.00 to 47.50%, respectively. Alternaria blight severity also varied in different genotypes and ranged between 18.75 to 56.25%, maximum being in genotype Kranti and minimum in LES-47. No significant correlation was observed between the fatty acid composition and disease severity. The oil content range from 38.1 to 42.60% and protein content was found highest in variety RGN-73. The amino acid viz. methionine and tryptophan range between 0.41 to 1.81 g/16gN and 0.41 to 1.81 g /16g N, respectively.

Effects of abscisic acid and temperature on erucic acid accumulation in oilseed rape (Brassica napus L.)

1997 ◽  
Vol 150 (4) ◽  
pp. 414-419 ◽  
Author(s):  
Jeroen A. Wilmer ◽  
Johannes P.F.G. Helsper ◽  
Linus H.W. van der Plas
Keyword(s):  
Abscisic Acid ◽  
Brassica Napus ◽  
Erucic Acid ◽  
Oilseed Rape ◽  
Brassica Napus L ◽  
Acid Accumulation
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