Determination of fatty acid composition in seed oil of rapeseed Brassica napus L. by mutated alleles of the FAD3 desaturase genesReportar como inadecuado




Determination of fatty acid composition in seed oil of rapeseed Brassica napus L. by mutated alleles of the FAD3 desaturase genes - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Journal of Applied Genetics

, Volume 53, Issue 1, pp 27–30

First Online: 13 September 2011Received: 16 March 2011Revised: 21 July 2011Accepted: 30 August 2011

Abstract

One of the goals in oilseed rape programs is to develop genotypes producing oil with low linolenic acid content C18:3, ≤3%. Low linolenic mutant lines of canola rapeseed were obtained via chemical mutagenesis at the Plant Breeding and Acclimatization Institute – NRI, in Poznan, Poland, and allele-specific SNP markers were designed for monitoring of two statistically important single nucleotide polymorphisms detected by SNaPshot analysis in two FAD3 desaturase genes, BnaA.FAD3 and BnaC.FAD3, respectively. Strong negative correlation between the presence of mutant alleles of the genes and linolenic acid content was revealed by analysis of variance. In this paper we present detailed characteristics of the markers by estimation of the additive and dominance effects of the FAD3 genes with respect to particular fatty acid content in seed oil, as well as by calculation of the phenotypic variation of seed oil fatty acid composition accounted by particular allele-specific marker. The obtained percentage of variation in fatty acid composition was considerable only for linolenic acid content and equaled 35.6% for BnaA.FAD3 and 39.3% for BnaC.FAD3, whereas the total percentage of variation in linolenic acid content was 53.2% when accounted for mutations in both genes simultaneously. Our results revealed high specificity of the markers for effective monitoring of the wild-type and mutated alleles of the Brassica napus FAD3 desaturase genes in the low linolenic mutant recombinants in breeding programs.

KeywordsBrassica napus L. FAD3 desaturase Fatty acid composition Genetic effects Seed oil SNaPshot analysis  Download fulltext PDF



Autor: Jan Bocianowski - Katarzyna Mikołajczyk - Iwona Bartkowiak-Broda

Fuente: https://link.springer.com/article/10.1007/s13353-011-0062-0



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