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Goffman, Fernando D.; Becker, Heiko C.

doi:10.1023/a:1015858618480

Cited by 40 publications

(10 citation statements)

References 11 publications

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“…The two diversity sets used in our study (panels 1 and 2) displayed different ranges of variation for tocopherol content and composition. The variation in panel 1 consisting mainly of winter types was comparable to the results obtained by Goffman and Becker (2002), who found a maximum of 367 mg kg −1 among 87 winter type rapeseed accessions. As expected, genetic variation for tocopherol content (197.54–460.07 mg kg −1 ) and composition (0.33–2.14 α/γ ratio) was much higher in panel 2, which is possibly due to its different composition (98 winter type and 35 spring type accessions).…”

Section: Discussionsupporting

confidence: 89%

“…The major tocopherol form in rapeseed oil is γ-tocopherol followed by α- and δ-tocopherol (Pongracz et al, 1995). The total tocopherol content (TTC) of 87 winter rapeseed genotypes ranged from 182 to 367 mg kg −1 and was significantly affected by genotype and environment (Goffman and Becker, 1999, 2002). Recently, genetic dissection of tocopherol biosynthesis in crop plants has been done for maize (Wong et al, 2003; Chander et al, 2008), soybean (Li et al, 2010), tomato (Almeida et al, 2011), and sunflower (Haddadi et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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A candidate gene-based association study of tocopherol content and composition in rapeseed (Brassica napus)

Fritsche

Wang

et al. 2012

Front. Plant Sci

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Rapeseed (Brassica napus L.) is the most important oil crop of temperate climates. Rapeseed oil contains tocopherols, also known as vitamin E, which is an indispensable nutrient for humans and animals due to its antioxidant and radical scavenging abilities. Moreover, tocopherols are also important for the oxidative stability of vegetable oils. Therefore, seed oil with increased tocopherol content or altered tocopherol composition is a target for breeding. We investigated the role of nucleotide variations within candidate genes from the tocopherol biosynthesis pathway. Field trials were carried out with 229 accessions from a worldwide B. napus collection which was divided into two panels of 96 and 133 accessions. Seed tocopherol content and composition were measured by HPLC. High heritabilities were found for both traits, ranging from 0.62 to 0.94. We identified polymorphisms by sequencing selected regions of the tocopherol genes from the 96 accession panel. Subsequently, we determined the population structure (Q) and relative kinship (K) as detected by genotyping with genome-wide distributed SSR markers. Association studies were performed using two models, the structure-based GLM + Q and the PK-mixed model. Between 26 and 12 polymorphisms within two genes (BnaX.VTE3.a, BnaA.PDS1.c) were significantly associated with tocopherol traits. The SNPs explained up to 16.93% of the genetic variance for tocopherol composition and up to 10.48% for total tocopherol content. Based on the sequence information we designed CAPS markers for genotyping the 133 accessions from the second panel. Significant associations with various tocopherol traits confirmed the results from the first experiment. We demonstrate that the polymorphisms within the tocopherol genes clearly impact tocopherol content and composition in B. napus seeds. We suggest that these nucleotide variations may be used as selectable markers for breeding rapeseed with enhanced tocopherol quality.

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Section: Discussionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

A candidate gene-based association study of tocopherol content and composition in rapeseed (Brassica napus)

Fritsche

Wang

et al. 2012

Front. Plant Sci

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“…γ-Toc is highly potent in quenching reactive N species (Cooney et al, 1993;Christen et al, 1997). δ-and β-Toc are less significant because of their low or negligible concentrations (Goffman and Becker, 2002). On average, rapeseed oils contain about 64% γ-Toc, 35% α-Toc, and <1% δ-Toc (Goffman and Becker, 2001;.…”

Section: Introductionmentioning

confidence: 99%

Response of seed tocopherols in oilseed rape to nitrogen fertilizer sources and application rates

Hussain

Jiang

Jabeen

et al. 2014

J. Zhejiang Univ. Sci. B

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Tocopherols (Tocs) are vital scavengers of reactive oxygen species (ROS) and important seed oil quality indicators. Nitrogen (N) is one of the most important fertilizers in promoting biomass and grain yield in crop production. However, the effect of different sources and application rates of N on seed Toc contents in oilseed rape is poorly understood. In this study, pot trials were conducted to evaluate the effect of two sources of N fertilizer (urea and ammonium nitrate). Each source was applied to five oilseed rape genotypes (Zheshuang 72, Jiu-Er-1358, Zheshuang 758, Shiralee, and Pakola) at three different application rates (0.41 g/pot (N1), 0.81 g/pot (N2), and 1.20 g/pot (N3)). Results indicated that urea increased α-, γ-, and total Toc (T-Toc) more than did ammonium nitrate. N3 was proven as the most efficient application rate, which yielded high contents of γ-Toc and T-Toc. Highly significant correlations were observed between Toc isomers, T-Toc, and α-/γ-Toc ratio. These results clearly demonstrate that N sources and application rates significantly affect seed Toc contents in oilseed rape.

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Section: Introductionmentioning

confidence: 99%

“…Tocopherols are essential micronutrients for humans and mammals [1] that are synthesized only by plants, a few cyanobacteria, and green algae [2]. Oilseed crops are the richest source of naturally occurring tocopherols [1]. The most potent fat-soluble antioxidants existing in nature, tocopherols, occur in four naturally occurring forms (α, β, γ, and δ), varying in the number and position of methyl groups on the chromanol ring [2].…”

Section: Introductionmentioning

confidence: 99%

Deciphering the Genetic Inheritance of Tocopherols in Indian Mustard (Brassica juncea L. Czern and Coss)

Meena

Taak²,

Chaudhary³

et al. 2022

Plants

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Tocopherol is vital for the nutritional value and stability of Indian mustard (Brassica juncea L. Czern and Coss) oil; nonetheless, the lack of information on genetic control is hampering its improvement. In this study, six populations (P1, P2, F1, F2, BC1P1, and BC1P2) of RLC3 × NPJ203 were evaluated in a family block design to evaluate the inheritance pattern, gene effects, and various other genetic parameters of tocopherol content (α, γ, and total), using generation mean analysis. The comparison of direct and reciprocal crosses indicated that the tocopherol content was not influenced by maternal inheritance. Negative directional heterosis showed that ATC, GTC, and TTC are governed by recessive genes. Potence ratio and degree of dominance highlighted an over-dominance type of gene interaction for GTC and TTC, whereas ATC was governed by epistatic interactions. Furthermore, the six-parameter model revealed a duplicate gene action for α-tocopherol content. Broad and narrow sense heritability coupled with genetic advances were high.

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Cited by 40 publications

References 11 publications

A candidate gene-based association study of tocopherol content and composition in rapeseed (Brassica napus)

A candidate gene-based association study of tocopherol content and composition in rapeseed (Brassica napus)

Response of seed tocopherols in oilseed rape to nitrogen fertilizer sources and application rates

Deciphering the Genetic Inheritance of Tocopherols in Indian Mustard (Brassica juncea L. Czern and Coss)

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