Inheritance of Oleic, Linoleic and Linolenic Acids in Seed Oil of Rapeseed (Brassica Napus)

Kondra, Z. P.; Thomas, Phil

doi:10.4141/cjps75-030

Cited by 31 publications

(17 citation statements)

References 9 publications

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“…Similar values of broad-sense heritability were estimated for oleic and linoleic acids in B. napus (Kondra & Thomas, 1975) . Nevertheless, it should be emphasized that the non-genetic variances in the present study was estimated from the between-plants (within-combinations) component of variance, since the chemical analyses were performed on single plants, not on single seeds .…”

Section: Discussionsupporting

confidence: 59%

Genetic control of fatty acid composition in seed oil of Sinapis alba L.

Ecker

Yaniv

1993

Euphytica

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Inheritance of fatty acid composition was studied in an Fl diallel cross in Sinapis alba. Crosses were made among accessions having contrasting amounts of oleic (C18 :1) and erucic (C22 :1) acid . Concentrations of oleic, linoleic (C18 :2), eicosenoic (C20 :1) and erucic (C22:1) acids were determined by gas-chromatography for each mating combination . Genetic analysis confirmed that the composition of the fatty acids was controlled mainly by the nuclear genes of the embryo . Additive gene action with partial dominance for the reducing alleles was noted for oleic and linoleic acids, while erucic acid showed an additive mode of inheritance with partial dominance for the enhancing alleles . Positive heterosis was demonstrated for eicosenoic acid content . Erucic acid content was strongly negatively correlated with oleic acid, suggesting a genetic interdependence between the two fatty acids . Broad-sense and narrow-sense heritability estimates for each of oleic, linoleic and erucic acids were very high, due to low between-plants non-genetic component of variance .

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Section: Discussionsupporting

confidence: 59%

Genetic control of fatty acid composition in seed oil of Sinapis alba L.

Ecker

Yaniv

1993

Euphytica

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“…According to Kondra and Thomas (1975), the similar behaviour of these fatty acids in crossings, as well the very high negative correlation, indicates that the formation of linoleic acid is controlled by a single gene system. On the other hand, the correlation between linoleic and a-linolenic acids is considerably smaller than the above and, in addition to ordinary positive correlation, negative correlations have also been occasionally found (Kondra andWilson 1976, Jönsson 1975 a).…”

Section: Biogenetic Dependancesmentioning

confidence: 98%

“…Relatively high heritability values (h 2 ) of 0.56 (Bartkowiak-Broda 1978), 0.26-0.59 (Kondra and Thomas 1975) for rape and 0.44-0.76 for turnip rape (Jönsson 1975 a) have been obtained for linoleic acid in controlled crossings. Jönsson (1975 a) has noted that the effect of the environment is considerably lower than would be expected and that increasing the linoleic acid level of summer turnip rape up to 40 % is a realistic target.…”

Section: Breeding For Polyunsaturatedfatty Acidsmentioning

confidence: 99%

“…A number of genes have been found to control the linoleic and a-linolenic acid levels in rape (Kondra and Thomas 1975). If alinolenic acid is formed through two pathways (D and F, Scheme 2), then they are controlled at two locii in turnip rape and at four locii in amphidiploid rape.…”

Section: Biogenetic Dependancesmentioning

confidence: 99%

“…Their inheritance is far more complex than that of erucic acid and, in addition, the variation is influenced by the environment to a considerable degree (Kondra and Thomas 1975, Bartkowiak-Broda 1983, Stefansson 1983). In such cases a reproducible analytical technique is of decisive importance in separating the effects of genetical properties and the environment.…”

Section: Introductionmentioning

confidence: 99%

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An analytical and breeding study on fatty acids in summer turnip rape (brassica campestris L. var. annua)

Laakso

1986

AFSci

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The fatty acid composition of the seed oil of summer turnip rape (Brassica campestris L. var. annua) was investigated by gas liquid chromatography (GLC). The reliability of conventional sampling methods in capillary GC was compared with that of the new on column and PTV (programmed temperature vaporizer) techniques, with particular reference to the determination of fatty acid variation. In order to develop new, well-adapted turnip rape strains with improved oil quality, a breeding programme for a higher linoleic acid content, based on individual plant selection, was performed in 1978—85. The results showed that the conventional sampling techniques involving sample transfer to a hot injector were very unreliable as regards precision and accuracy. This was especially the case in the determination of trace fatty acid levels. The PTV methods with splitless and solvent split mode were as precise as cold on-column injection. The PTV sampling modifications, which are all superior to classical techniques, were even more suitable for routine analyses than on-column injection, where several restrictions are met. The analytical error with PTV for most of the compounds represented less than 1 % of the variation found for fatty acids within a turnip rape variety. The breeding experiments indicated that the level of linoleic acid can be increased under open-pollinated conditions in the field without affecting the α-linolenic acid content. The greenhouse conditions, on the other hand, were found to have a considerable environmental influence on the variation of these compounds, resulting in no response to linoleic-acid selection. In field trials, several strains with yields comparable to the varieties commonly cultivated in Finland were selected with a higher linoleic acid content (up to25 %). Most of them also contained no erucic acid. The new evidence concerning its beneficial physiological effects indicate that rapeseed oil should be considered as a serious alternative among sources of essential fatty acids. Such aspects should also be taken into account in future breeding of rapeseed fatty acids.

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Breeding for Improved Oil Quality in Winterrape by Means of Haploid Culture Techniques

Koch¹

1988

Fett/Lipid

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Farmers growing oilseed rape are facing well defined demands on the quality traits of their product. Therefore their crops are regularly grown from seed with genetically low erucic acid and low glucosinolate content. But well adapted varieties with low linolenic acid content or yellow seed coat would fit further demands of seed crushers. Such genotypes exist, but in general they have poor agricultural habits. Breeders select for genotypes combining quality traits with good adaptation to the farmers' needs. The breeders' success is limited by genetical influences as segregation within the tested progenies and dominance of the traits, and non-genetical influences on the expression of the traits. To eliminate the genetical influences would require very time consuming conventional breeding methods. The recently developed haploid culture techniques are alternatives to these conventional breeding methods. However, to develop a single testing unit is very expensive. The use of such methods therefore is only justified, if the magnitude of the former mentioned genetic effects hinders the efficient enhancement of the quality traits. Genetic effects estimated by various authors give no expectation of such influences. A clear advantage of the haploid techniques in enhancing the quality traits discussed here, is therefore not anticipated. ' N. N. Roy and A. WTarr, Prospects for the development of rapeseed (B. napus L.) with improved linoleic and linolenic acid content, Plant Breeding 98, 89 119871. K. Mather andJ. L. Jinh, Biometrical Genetics, 3rd ed., Chapman and Hall, London, New York, 1982. '(I E. Bruncklaus-Jung and G. Robbebn, Genetical and physiological investigations on mutants for polyenoic fatty acids in rapeseed (Brassica napus L.), Plant Breeding 98, 9 [1987].5 !)

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Inheritance of Oleic, Linoleic and Linolenic Acids in Seed Oil of Rapeseed (Brassica Napus)

Cited by 31 publications

References 9 publications

Genetic control of fatty acid composition in seed oil of Sinapis alba L.

Genetic control of fatty acid composition in seed oil of Sinapis alba L.

An analytical and breeding study on fatty acids in summer turnip rape (brassica campestris L. var. annua)

Breeding for Improved Oil Quality in Winterrape by Means of Haploid Culture Techniques

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