QTL for fatty acid composition and yield in linseed (Linum usitatissimum L.)

Kumar, Santosh; You, Frank M.; Duguid, Scott; Booker, Helen; Rowland, G. G.; Cloutier, Sylvie

doi:10.1007/s00122-015-2483-3

Cited by 57 publications

(74 citation statements)

References 68 publications

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“…This might be achieved through genome-wide highresolution allele detection via precise quantitative trait loci (QTL) mapping of potential parental resources. In flax, some QTL associated with seed yield, oil content, ALA, and other important agronomic traits have been identified based on simple sequence repeat and single nucleotide polymorphism markers with bi-parental mapping populations (Cloutier et al 2011;Kumar et al 2015) and the Canadian flax core collection (Soto-Cerda et al 2012, 2013c. Utilizing the outcomes from the Total Utilization Flax Genomics (TUFGEN) project, the high-resolution chromosome haplotype map of the core collection has been generated (unpublished data).…”

Section: Ancestors Of Canadian Flax Cultivars To Assist Parent Selectionmentioning

confidence: 99%

Pedigrees and genetic base of flax cultivars registered in Canada

et al. 2016

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Flax is an important oilseed crop with industrial, animal, and human nutrition uses. Breeding programs for linseed and fibre flax were initiated in Canada in the early 1900s. A total of 82 flax cultivars have been registered in Canada since 1910, including 24 cultivars introduced from foreign countries and 58 cultivars developed by Canadian breeders. This study collated pedigree data of Canadian flax cultivars and quantified their genetic base via pedigree analysis and coefficient of parentage (CP). A fairly high mean CP of 0.14 was observed between all registered cultivars; this value was even higher (0.23) when only the 46 cultivars released from 1981-2015 were considered. The registered cultivars traced back to 46 ancestors; 72% originated from foreign countries and contributed 83% of the genetic base of all cultivars, illustrating the dominant role played by foreign germplasm in the genetic improvement of Canadian flax. The top 11 ancestors contributed 70%-93% of the genetic base of modern flax cultivars released in the last three decades and formed the core gene pool of Canadian flax cultivars. The genetic base of Canadian cultivars is relatively narrow, although it has gradually expanded, especially in the last two decades. Broadening the genetic base through the introduction of new exotic germplasm is needed to invigorate the gene pool of Canadian flax breeding programs.Key words: flax, cultivar, pedigree, ancestor, genetic base, Canada.Résumé : Le lin est un important oléagineux utilisé à des fins industrielles ainsi que pour l'alimentation humaine et animale. Les premiers programmes d'hybridation visant à accroître la production de graines et de fibres de cette culture remontent au début du vingtième siècle. Quatre-vingt-deux variétés de lin ont été homologuées au Canada depuis 1910, ce qui comprend 24 cultivars de l'étranger et 58 créés par des améliorateurs canadiens. Cette étude rassemble les données généalogiques sur les variétés canadiennes et en quantifie la base génétique d'après leur ascendance et leur coefficient de parenté (CP). Les auteurs ont relevé un CP moyen relativement élevé (0,14) entre les variétés homologuées; le CP est encore plus élevé (0,23) quand on ne tient compte que des 46 cultivars homologués entre 1981 et 2015. Les variétés homologuées ont 46 ancêtres. Soixante-douze pour cent ont pour origine des pays étrangers et représentent 83 % de la base génétique des cultivars, signe du très grand rôle que le matériel génétique exotique a joué dans l'amélioration du lin canadien. Les onze principaux ancêtres ont fourni de 70 à 93 % de la base génétique des variétés de lin contemporaines, homologuées au cours des trois dernières décennies, et constituent le principal réservoir de gènes des cultivars canadiens. Les variétés canadiennes de lin se caractérisent par une base génétique assez étroite, bien que celle-ci se soit graduellement élargie, surtout au cours

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Section: Ancestors Of Canadian Flax Cultivars To Assist Parent Selectionmentioning

confidence: 99%

Pedigrees and genetic base of flax cultivars registered in Canada

et al. 2016

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“…The same MAD2 design was employed with the same population in all environments but the designs differed across populations. The experimental designs and phenotyping for the 22 traits in CC, 14 in BM, 19 in EV, and 11 in SU over six to eight environments have been previously described (Cloutier et al, 2010;Soto-Cerda et al, 2014b;Kumar et al, 2015;You et al, 2016b). The adjusted observations in each environment were used for estimation and evaluation.…”

Section: Empirical Datamentioning

confidence: 99%

“…Heritability estimation varies depending on the experimental design (Holland et al, 2003). The modified augment design (MAD) has been proposed for square plots (Type 1) (Lin and Poushinsky, 1983) and specifically for rectangular plots (Type 2 -MAD2) (Lin and Poushinsky, 1985) for field evaluation of a large number of breeding lines and used in many crops such as flax (Soto-Cerda et al, 2014a;Soto-Cerda et al, 2014b;Kumar et al, 2015), wheat (Golparvar et (Schaalje et al, 1987), soybean (Lin and Voldeng, 1989), and barley (May et al, 1989;May and Kozub, 1995). This design can accommodate a large number of unreplicated test genotypes with typically only three control genotypes for error control (You et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

A method of estimating broad-sense heritability for quantitative traits in the type 2 modified augmented design

Frank¹,

Jia²,

Sylvie³

et al. 2016

J. Plant Breed. Crop Sci.

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Heritability is a basic genetic parameter for quantitative traits that may determine their selection generation and intensity as well as predict their selection response and efficiency in plant breeding. Estimation of heritability varies based on experimental design. The type 2 modified augmented design (MAD2) as an unbalanced experimental design, has been proposed for evaluating numerous unreplicated test genotypes with several replicated control genotypes to adjust for soil heterogeneity. Here, we define an inter-environment correlation ( ), that is, the mean Pearson's correlation coefficient of trait performance for test genotypes between all pairs of environments, to approximate broad-sense heritability ( . Computer simulation and empirical results demonstrated that was consistent with estimates on a plot basis by ANOVA for non-missing data sets, and similar to those by the restricted maximum likelihood (REML)-based method for missing data sets. The method was shown to generally outperform the ANOVA-and REML-based methods.

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“…Sharp temperature fluctuations during the ripening period cause a relatively greater accumulation of unsaturated fatty acids. Many researchers note that the change in oil content depends on the genotypic differences [Kumar et al 2015; Krasnova 2010; Galitsky and Shamanin 2014]. Kumar et al [2015] show genetic markers determining the formation of the fatty acid composition of oil and total oil.…”

Section: Introductionmentioning

confidence: 99%

“…Many researchers note that the change in oil content depends on the genotypic differences [Kumar et al 2015; Krasnova 2010; Galitsky and Shamanin 2014]. Kumar et al [2015] show genetic markers determining the formation of the fatty acid composition of oil and total oil. According to Krasnova [2010], the difference in the content of raw fat among flaxseed cultivars varied from 18% to 43%.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Agroclimatic Factors on the Formation of Oil Content in Flax Seeds in the North of Kazakhstan

Gordeyeva¹,

Shestakova²

2018

J. Ecol. Eng.

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Flax (Linum usitatissimum L.) is one of the promising oil crops in the north of Kazakhstan. Over the last 10 years, the total area under this crop in the region has increased fourteen-fold, since flax is a very plastic crop for steppe and dry steppe conditions, and oil seeds are in high demand in the world market. Flaxseed oil, due to the content of polyunsaturated fatty acids, occupies one of the first positions among other edible vegetable oils. Depending on the environmental conditions, the oil content of the crop may vary from 36.4% to 52.0%, while, as noted by many researchers, the change in the oil content depends on the genotypic characteristics. Therefore, the study aims to analyze the influence of the genotype and climatic conditions of cultivation on the fat biosynthesis in flax seeds in the context of the dry steppe zone of Northern Kazakhstan on dark chestnut soils of the Akmola region. Field experiments were conducted in 2015-2017 with the study of nine oil flaxseed cultivars (of mid-season varieties) sown on May 20th at the seeding rate of 7 million seeds/ha based on the traditional technology of cultivation recommended for the region. The climatic parameters were taken into account according to the meteorological service data. The fat content was determined by the extraction method using a Soxhlet apparatus, in accordance with GOST (AllUnion State Standard) 10857-64, and the moisture content was determined by means of the thermogravimetric method, according to the National Standard of the Republic of Kazakhstan 2.195-2010, for the recalculation of the oil content for absolutely dry matter. It was found that the formation of oil depends on the climatic parameters and on the sum of active temperatures during the ripening period, in particular. The evaluation of plasticity and stability of the cultivars (genotypes) showed that VNIIMK 620, Lirina, Karabalyksky 7 can be considered highly valuable cultivars and Severny, Biryuza, Kazar, Ilyich -valuable cultivars in terms of the oil content for the dry steppe zone.

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QTL for fatty acid composition and yield in linseed (Linum usitatissimum L.)

Cited by 57 publications

References 68 publications

Pedigrees and genetic base of flax cultivars registered in Canada

Pedigrees and genetic base of flax cultivars registered in Canada

A method of estimating broad-sense heritability for quantitative traits in the type 2 modified augmented design

The Influence of Agroclimatic Factors on the Formation of Oil Content in Flax Seeds in the North of Kazakhstan

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