Journal ArticleDOI
Quantitative trait locus effects and environmental interaction in a sample of North American barley germ plasm.
Patrick M. Hayes,Ben Hui Liu,Steven J. Knapp,F. Chen,B. L. Jones,Tom Blake,Jerome D. Franckowiak,D Rasmusson,Mark E. Sorrells,Steven E. Ullrich,D. Wesenberg,Andris Kleinhofs +11 more
TLDR
Quantitative trait locus (QTL) and QTL x environment (E) interaction effects for agronomic and malting quality traits were measured using a 123-point linkage map and multi-environment phenotype data from an F1-derived doubled haploid population of barley.Abstract:
Quantitative trait locus (QTL) and QTL x environment (E) interaction effects for agronomic and malting quality traits were measured using a 123-point linkage map and multi-environment phenotype data from an F1-derived doubled haploid population of barley (Hordeum vulgare). The QTL × E interactions were due to differences in magnitude of QTL effects. Highly significant QTL effects were found for all traits at multiple sites in the genome. Yield QTL peaks and support intervals often coincided with plant height and lodging QTL peaks and support intervals. QTL were detected in the vicinity of a previously mapped Mendelian maturity locus and known function probes forα- andβ-amylase genes. The average map density (9.6 cM) should be adequate for molecular marker-assisted selection, particularly since there were few cases of alternative favorable alleles for different traits mapping to the same or adjacent intervals.read more
Citations
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Journal ArticleDOI
Marker-assisted selection: an approach for precision plant breeding in the twenty-first century
TL;DR: An overview of the advantages of MAS and its most widely used applications in plant breeding, providing examples from cereal crops and ways in which the potential of MAS can be realized are suggested.
Journal ArticleDOI
Advanced backcross QTL analysis: a method for the simultaneous discovery and transfer of valuable QTLs from unadapted germplasm into elite breeding lines.
Steve Tanksley,James C. Nelson +1 more
TL;DR: If successfully employed, advanced backcross QTL analysis can open the door to exploiting unadapted and exotic germplasm for the quantitative trait improvement of a number of crop plants.
Journal ArticleDOI
Genome mapping, molecular markers and marker-assisted selection in crop plants
TL;DR: Applications of genome mapping and marker-assisted selection in crop improvement are reviewed and the use of MAS in breeding for disease and pest resistance is considered.
Journal ArticleDOI
RFLP mapping of five major genes and eight quantitative trait loci controlling flowering time in a winter × spring barley (Hordeum vulgare L.) cross
TL;DR: Model fitting showed that the 13 putative genes, and their interactions, could account for all the observed genetical variation from both spring and autumn sowings, giving a complete model for the control of flowering time in this cross.
Journal ArticleDOI
Linkage disequilibrium mapping of yield and yield stability in modern spring barley cultivars.
Arnold T. W. Kraakman,Rients E. Niks,Petra M. M. M. Van den Berg,Piet Stam,Fred A. van Eeuwijk +4 more
TL;DR: The results indicate that association mapping approaches can be a viable alternative to classical QTL approaches based on crosses between inbred lines, especially for complex traits with costly measurements.
References
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Journal ArticleDOI
The estimation of map distances from recombination values.
TL;DR: The genetic map is a tool to quantify the distance between genes on a chromosome, based on the observed frequency of crossovers during cell division, which is used to estimate the total distance between chromosomes.
Journal ArticleDOI
A simple regression method for mapping quantitative trait loci in line crosses using flanking markers.
Chris Haley,Sara Knott +1 more
TL;DR: Methods for mapping QTL based on multiple regression which can be applied using any general statistical package are developed and it is shown that these regression methods produce very similar results to those obtained using maximum likelihood.
Journal ArticleDOI
Mendelian factors underlying quantitative traits in tomato: comparison across species, generations, and environments.
Andrew H. Paterson,S Damon,J D Hewitt,Dani Zamir,Haim D. Rabinowitch,Stephen E Lincoln,Eric S. Lander,Steve Tanksley +7 more
TL;DR: The results suggested that, for a trait with low heritability (soluble solids), the phenotype of F3 progeny could be predicted more accurately from the genotype of the F2 parent at QTLs than from the phenotypic variation of theF2 individual.
Journal ArticleDOI
A molecular, isozyme and morphological map of the barley (Hordeum vulgare) genome.
Andris Kleinhofs,A. Kilian,M. A. Saghai Maroof,R. M. Biyashev,Patrick M. Hayes,F. Chen,Nora L. V. Lapitan,A. L. Fenwick,Tom Blake,Vladimir Kanazin,E. Ananiev,L. Dahleen,Dave Kudrna,J. Bollinger,Steven J. Knapp,Liu Bh,Mark E. Sorrells,M. Heun,Jerome D. Franckowiak,David L. Hoffman,R. Skadsen,Brian J. Steffenson +21 more
TL;DR: A map of the barley genome consisting of 295 loci was constructed, which includes 152 cDNA restriction fragment length polymorphism (RFLP), 114 genomic DNA RFLP, 14 random amplified polymorphic DNA (RAPD), five isozyme, two morphological, one disease resistance and seven specific amplicon polymorphism
Journal ArticleDOI
RFLP analysis of the size of chromosomal segments retained around the Tm-2 locus of tomato during backcross breeding.
TL;DR: It is proposed that, by monitoring recombination around genes of interest with linked RFLP markers, one can quickly and efficiently reduce the amount of linkage drag associated with introgression.
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