Search

Your search keyword '"Stam, Piet"' showing total 162 results
Start Over Author "Stam, Piet"
162 results on '"Stam, Piet"'

21. Linkage disequilibrium mapping of yield and yield stability in modern spring barley cultivars

Author

Kraakman, Arnold T.W., Niks, Rients E., Van den Berg, Petra M.M.M., Stam, Piet, and Van Eeuwijk, Fred A.

Subjects
Barley -- Research, Biological sciences
Abstract

Associations between markers and complex quantitative traits were investigated in a collection of 146 modern two-row spring barley cultivars, representing the current commercial germ plasm in Europe. Using 236 AFLP markers, associations between markers were found for markers as far apart as 10 cM. Subsequently, for the 146 cultivars the complex traits mean yield adaptability, (Finlay-Wilkinson slope), and stability (deviations from regression) were estimated from the analysis of variety trial data. Regression of those trails on individual marker data disclosed marker-trait associations for mean yield and yield stability. Support for identified associations was obtained from association profiles, i.e., from plots of P-values against chromosome positions. In addition, many of the associated markers were located in regions where earlier QTL were found for yield and yield components. To study the oligogenic genetic base of the traits in more detail, multiple linear regression of the traits on markers was carried out, using stepwise selection. By this procedure, 18-20 markers that accounted for 40-58% of the variation were selected. Our 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.

Published
2004

23. Coupling estimated effects of QTLs for physiological traits to a crop growth model: predicting yield variation among recombinant inbred lines in barley

Author

Yin, Xinyou, Chasalow, Scott D., Dourleijn, C. Johan, Stam, Piet, and Kropff, Martin J.

Subjects
Plant genetics -- Research, Barley -- Genetic aspects, Crops -- Models, Plants -- Physiological aspects, Chromosome mapping -- Usage, Genetically modified plants -- Genetic aspects, Inbreeding -- Research, Biological sciences
Abstract

Predicting barley yield variation among recombinant inbred lines is discussed. A study has been carried out to assess ability of a crop growth model with QTL-based estimates of physiological input parameters to the yield. The model predicts yield as spike biomass accumulates in the post-flowering period. A two-stage procedure for predicting trait values from estimated additive and epistatic effects of QTLs is described. Both types of input values often gave large discrepancies between observed and predicted values.

Published
2000

24. The role of ecophysiological models in QTL analysis: the example of specific leaf area in barley

Author

Yin, Xinyou, Kropff, Martin J., and Stam, Piet

Subjects
Barley -- Genetic aspects, Plant genetics -- Research, Biological models -- Usage, Biotic communities -- Research, Biological sciences
Abstract

Ecophysiological models have usefulness in quantitative trait loci (QTL) analysis, as can be shown with the example of specific leaf area (SLA) in barley. Crop development models can be important in QTL analysis of a trait that varies with developmental stage. The assumption is made that crop development rate is affected by daily effective temperature and can make the identification of QTL easier. Potential uses of ecophysiological crop growth models in QTL analysis are discussed.

Published
1999

25. Villa VPRO

Author

Stam, Piet

Subjects
MVRDV -- Contracts -- Buildings and facilities, VPRO -- Buildings and facilities, Television broadcasting industry -- Buildings and facilities -- Contracts, Architecture, Modern -- Design and construction, Office buildings -- Design and construction, Architectural firms -- Contracts -- Buildings and facilities, Television broadcasting, Architectural practice -- Contracts -- Buildings and facilities, Architecture and design industries, Business, Contract agreement, Design and construction, Buildings and facilities, Contracts
Abstract

Reinterpreting the typology of the villa, MVRDV's offices for a broadcasting company form a rich internal landscape characterized by placemaking, incident and spatial delight. VPRO is an independent broadcasting organization [...]

Published
1999

29. Multiple alleles for tuber shape in diploid potato detected by qualitative and quantitative genetic analysis using RFLPs

Author

Eck, Herman J. van, Jacobs, Jeanne M.E., Stam, Piet, Ton, Jacqueline, Stiekema, Willem J., and Jacobsen, Evert

Subjects
Quantitative genetics -- Analysis, Potatoes -- Genetic aspects, Heredity -- Analysis, Biological sciences
Abstract

Ro alleles of the Ro locus that contains quantitative trait loci (QTL) cause the tuber shape in dipolid level phenotypes. The ro locus is mapped to the chromosome 10 using restriction fragment length polymorphisms (RFLPs). The progeny is divided into four genotypes by RFLP alleles linked to Ro alleles. Polymorphic markers enable precise QTL mapping during genetic factor segregation from parent strains.

Published
1994

30. Integration of the classical and molecular linkage maps of tomato chromosome 6

Author

Weide, Rob, Wordragen, Monique F. van, Lankhorst, Rene Klein, Verkerk, Ruud, Hanhart, Corrie, Liharska, Tsvetana, Pap, Eward, Stam, Piet, Zabel, Pim, and Koornneef, Maarten

Subjects
Tomatoes -- Genetic aspects, Linkage (Genetics) -- Research, Chromosome mapping -- Analysis, Genetic markers -- Analysis, Biological sciences
Abstract

Lycopersicon esculentum line comprising a translocated chromosome 6 from L. pennelli crosses facilitates the integration of linkage map of tomato chromosome 6. Integrated linkage map construct of chromosome 6 defines the locations of cDNA, genomic DNA- and RAPD markers, corresponding to 10 classical genetic markers. The classical linkage map incorporates a coordinated analysis of new data and previously obtained data. A mapping program, JOINMAP, facilitates the evaluation and compilation of data to yield the latest version of linkage map.

Published
1993

40. Mapeo de peroxidasas (Prxs) en accesiones de cebada (Hordeum vulgare) mediante la técnica NBS-profiling

Author

González Fernández, Ana María, Marcel, T. C., Stam, Piet, van der Linden, C. G., and Niks, R. E.

Subjects
Peroxidasas, Prx-profiling, Cebada, Hordeum vulgare
Abstract

2 páginas, 2 figuras -- Póster presentado al Seminario sobre Biodiversidad Vegetal en el Sistema Agroforestal Atlántico, celebrado en Pontevedra (España) entre el 27 y el 28 de octubre de 2010., Las peroxidasas de clase III (Prxs; EC1.11.1.7) se encuentran en todas las plantas superiores. Estas Prxs participan en un amplio rango de procesos fisiológicos debido a su alto número de isoformas y a la regulación tan heterogénea de su expresión. Además, estas enzimas multifuncionales se encuentran altamente conservadas tanto entre genes parálogos como ortólogos. Este trabajo demuestra el uso efectivo de una nueva estrategia, denominada Prx-profiling, para mapear nuevos marcadores homólogos a Prxs en el genoma de cebada (Hordeum vulgare).Gracias al empleo de la nueva estrategia denominada Prx-Profiling, se han conseguido mapear un gran número de genes de Prx en el genoma de cebada, pudiéndose hablar del mapeo de un 95% de los clusters reales de Prxs en cebada., Este trabajo ha sido efectuado gracias a la financiación obtenida por A.M.González por el programa Angeles Alvariño de la Xunta de Galicia y al proyecto Bioexploit Integrated FOOD-CT-2005-513959 que financió a T. Marcel.

Published
2010

42. Peroxidase profiling reveals genetic linkage between peroxidase gene clusters and basal host and non-host resistance to rusts and mildew in barley

Author

González Fernández, Ana María, Marcel, T. C., Kohutova, Zuzana, Stam, Piet, Linden, C. Gerard van der, Niks, R. E., González Fernández, Ana María, Marcel, T. C., Kohutova, Zuzana, Stam, Piet, Linden, C. Gerard van der, and Niks, R. E.

Abstract

Background: Higher plants possess a large multigene family encoding secreted class III peroxidase (Prx) proteins. Peroxidases appear to be associated with plant disease resistance based on observations of induction during disease challenge and the presence or absence of isozymes in resistant vs susceptible varieties. Despite these associations, there is no evidence that allelic variation of peroxidases directly determines levels of disease resistance. Methodology/Principal Findings: The current study introduces a new strategy called Prx-Profiling. We showed that with this strategy a large number of peroxidase genes can be mapped on the barley genome. In order to obtain an estimate of the total number of Prx clusters we followed a re-sampling procedure, which indicated that the barley genome contains about 40 peroxidase gene clusters. We examined the association between the Prxs mapped and the QTLs for resistance of barley to homologous and heterologous rusts, and to the barley powdery mildew fungus. We report that 61% of the QTLs for partial resistance to P. hordei, 61% of the QTLs for resistance to B. graminis and 47% of the QTLs for non-host resistance to other Puccinia species co-localize with Prx based markers. Conclusions/Significance: We conclude that Prx-Profiling was effective in finding the genetic location of Prx genes on the barley genome. The finding that QTLs for basal resistance to rusts and powdery mildew fungi tend to co-locate with Prx clusters provides a base for exploring the functional role of Prx-related genes in determining natural differences in levels of basal resistance. © 2010 González et al.

Published
2010

49. Genetic Analysis.

Author

Walker, John M., Salinas, Julio, Sanchez-Serrano, Jose J., Koornneef, Maarten, Alonso-Blanco, Carlos, and Stam, Piet

Abstract

The Mendelian analysis of genetic variation, available as induced mutants or as natural variation, requires a number of steps that are described in this chapter. These include the determination of the number of genes involved in the observed trait's variation, the determination of dominance relationships between alleles of the same locus, and epistatic interactions with related genetic variants. A new variant should be compared with previously identified genetic variants, which is most efficiently done by allelism tests in case of recessive mutants. In addition the locus should be localized on the genetic and physical map by linkage analysis. The mapping of mutant loci in Arabidopsis is facilitated by the genomic resources available in Arabidopsis and often consists of two steps, a crude and a fine mapping, the latter enabling the approximate location of a variant on the sequence map of Arabidopsis. [ABSTRACT FROM AUTHOR]

Published
2006
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results