Molecular marker-assisted selection for enhanced yield in malting barley

Schmierer, D.; Kandemır, N.; Kudrna, David; Jones, B. L.; Ullrich, S. E.; Kleinhofs, A.

doi:10.1007/s11032-004-0903-1

Cited by 38 publications

(18 citation statements)

References 28 publications

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“…Although it is considered to be a well-known method for introgression or substitution of a target allele, the large number of generations required to recover the recurrent parent genome and the presence of portions of the donor parent genome linked to the favorable allele transferred (dragged), there are two problems inherent to the backcross (Benchimol et al, 2005). On the one hand, a wellestablished alternative in plant breeding is the procedure of molecular marker-assisted backcross (Tanksley, 1983;Young and Tanksley, 1989;Visscher et al, 1996;Schmierer et al, 2004), which helps in classical procedures, accelerating the recovery of recurrent parent genome and reducing the number of generations required for introgression of the gene of interest . This strategy can also increase genetic gain and economic efficiency in relation to classical procedures (Kuchel et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Genetic characterization of papaya plants (Carica papaya L.) derived from the first backcross generation

Ramos¹,

Pereira²,

Silva³

et al. 2011

Genet. Mol. Res.

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ABSTRACT. The limited number of papaya varieties available reflects the narrow genetic base of this species. The use of backcrossing as a breeding strategy can promote increases in variability, besides allowing targeted improvements. Procedures that combine the use of molecular markers and backcrossing permit a reduction of the time required for introgression of genes of interest and appropriate recovery of the recurrent genome. We used microsatellite markers to characterize the effect of firstgeneration backcrosses of three papaya progeny, by monitoring the level of homozygosity and the parental genomic ratio. The homozygosity level in the population ranged from 74 to 94%, with a mean of 85% for the three progenies (52-08, 52-29 and 52-34). The high level of inbreeding found among these genotypes increases the expectation of finding more than 95% fixed loci in the next generation of self-fertilization of superior genotypes. The mean proportion of the recurrent parent genome found in first-generation backcross progeny was 50.1%; 52-34 had a larger genomic region in common with the recurrent genitor and the lowest level of homozygosity. The progeny 52-08 was genetically closest to the donor genitor, and it also had the highest level of homozygosity. We found that linking conventional procedures and molecular markers contributed to an increase in the efficiency of the breeding program.

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Section: Introductionmentioning

confidence: 99%

Genetic characterization of papaya plants (Carica papaya L.) derived from the first backcross generation

Ramos¹,

Pereira²,

Silva³

et al. 2011

Genet. Mol. Res.

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“…It is envisaged that further improvement in yield potential might require integrated approaches involving traditional breeding and MAS to select a crop ideotype for a given environment (Francia et al 2005 ). MAS for yield enhancement in a cultivar has been demonstrated in barley (Schmierer et al 2004 ). Yield-enhancing QTLs from wild species appear promising (Swamy and Sarla 2008 ) but are yet to be exploited for cultivar development.…”

Section: Enhancing Yield Potentialmentioning

confidence: 99%

Genetic Markers, Trait Mapping and Marker-Assisted Selection in Plant Breeding

Kadirvel

Senthilvel

Geethanjali

et al. 2015

Plant Biology and Biotechnology

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Genetic markers have long been used for characterization of plant genetic diversity and exploitation in crop improvement. The advent of DNA marker technology (during 1980s) has revolutionized crop breeding research as it has enabled the breeding of elite cultivars with targeted selection of desirable gene or gene combinations in breeding programmes. DNA markers are considered better over traditional morphology and protein-based markers because they are abundant, neutral, reliable, convenient to automate and cost-effective. Over the years, DNA marker technology has matured from restriction based to PCR based to sequence based and to eventually the sequence itself with the emergence of novel genome sequencing technologies. Trait mapping has been the foremost application of molecular markers in plant breeding. Genomic locations of numerous genes or quantitative trait loci (QTLs) associated with agronomically important traits have been determined in several crop plants using linkage or association mapping approaches. Plant breeders always look for an easy, rapid and reliable method of selection of desirable plants in breeding populations. Conventionally, desirable plants are selected based on phenotypic observations. The phenotypic selection for complex agronomic traits is diffi cult, unpredictable and challenging. Once the marker-trait association is correctly established, the gene-or QTL-linked markers can be used to select plants carrying desirable traits, the process called marker-assisted selection (MAS). Marker-assisted backcrossing (MABC) has been widely used for transferring single major gene or combination of major genes into the background of elite cultivar; the process

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“…Only few examples of successful application of MAS for quantitative traits are found, such as for malting quality (Coventry et al 2003) and yield in barley (Schmierer et al 2004), as well as for yield in maize (Stuber et al 1992). The reason may be that many issues can complicate or even prevent the use of MAS for QTLs such as: (a) If the target trait is inXuenced by many QTLs with relatively small eVect, MAS is ineYcient; the subpopulation possessing all optimal marker alleles, will be small so only a relatively minor selection progress is gained .…”

Section: Marker-assisted Selectionmentioning

confidence: 99%

Molecular markers to exploit genotype–environment interactions of relevance in organic growing systems

Backes

Østergård

2008

Euphytica

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One of the substantial diVerences between conventional and organic growing systems is the degree to which the farmer can control biotic and abiotic stresses; for organic growing systems varieties are needed with a broad adaptation to annually varying factors, while at the same time a good speciWc adaptation is necessary with respect to more constant climate and soil conditions. This combination of requirements implies that varieties for organic farming need to be better characterised with respect to genotype £ environment interactions than varieties for conventional farming. Such interactions, which often are found for quantitatively expressed traits, are in general diYcult to deal with in phenotypic selection. New approaches for QTL analyses (e.g. using physiological models) facilitate estimation of eVects of genes on a trait (the phenotype) as a response to environmental inXuences. From such analyses, markers can be identiWed which may help to predict the trait expression of a plant genotype in relation to deWned environmental factors. The application of markers to select for loci with speciWc interactions with the environment could, therefore, be especially important for plant breeders targeting organic farming systems.

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Molecular marker-assisted selection for enhanced yield in malting barley

Cited by 38 publications

References 28 publications

Genetic characterization of papaya plants (Carica papaya L.) derived from the first backcross generation

Genetic characterization of papaya plants (Carica papaya L.) derived from the first backcross generation

Genetic Markers, Trait Mapping and Marker-Assisted Selection in Plant Breeding

Molecular markers to exploit genotype–environment interactions of relevance in organic growing systems

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