Inheritance of long chain fatty acid content in rapeseed (Brassica napus L.)

Abstract

A large industrial oil market has recently developed for high erucic acid (>500 g kg ¡1 ) rape (Brassica napus L.) cultivars. This research was conducted to: (i) determine genetic eVects for Wve fatty acids, (ii) determine if maternal eVects inXuence fatty acid content of progeny, and (iii) estimate correlations among fatty acid contents in hybrid progeny. Lines with very high erucic acid content and very low erucic acid content were used to develop eight generations to estimate additive, dominance, and epistatic eVects for fatty acid content using Generation Means Analyses. Mean oleic, linoleic, linolenic, eicosenoic and erucic acid content diVered among generations and additive genetic eVects were important for control of all Wve fatty acids, contributing from 84% to 97% of the total sums of squares for each fatty acid. Epistasis was observed in the inheritance of eicosenoic acid. Maternal eVects were not detected.

Oil Content and Fatty Acids Composition inBrassicaSpecies

“…A large number of industrial oil markets have recently developed for high erucic acid (>500 g kg -1 ) rapeseed. [16] High heritability for erucic acid in the present study (92%) indicates the efficiency of selection to develop varieties for industrial purposes. these results are in line with findings of Singh et al (2002) [17] and Khan et al (2008).…”

“…[22] In this study, some accessions showed very high erucic acid content. Generally, high erucic acid oil is useful for industrial applications [16] and is valuable raw material for manufacture of industrial products such as plasticizers, detergents, surfactants, polyesters among others. [23] Nowadays, the development of genotypes with very high erucic content is a priority in Brassica breeding.…”

Assessment of genetic effects on important breeding traits in reciprocal DH populations of winter oilseed rape (Brassica napus L.)

“…The results of the present study suggested that maternal effects did not exert a distinct effect on the content of the analyzed fatty acid in reciprocal DH populations. Likewise, Coonrod et al (2008) observed the lack of maternal effects for any of five long chain fatty acid contents in progeny obtained from two parental lines that differed in terms of erucic and oleic acid content. However, in studies on the heredity of the oleic acid content of oilseed rape, Zhang et al (2004) concluded that this was simultaneously controlled by diploid embryo nuclear genes, cytoplasmic genes and diploid maternal plant nuclear genes.…”

An insight in the genetic control and interrelationship of some quality traits in Brassica napus

“…Shu-Fen et al (2006) and Zhao et al (2005Zhao et al ( , 2006 reported additive and over-dominance type of gene actions whereas Wang et al (2010) reported additive and nonadditive effects for oil content in B. napus. Coonrod et al (2008) observed additive gene action for oleic acid and linolenic acid. Turi et al (2010) reported non-additive gene action for protein content.…”