The Experts below are selected from a list of 9357 Experts worldwide ranked by ideXlab platform

Philipp W Simon - One of the best experts on this subject based on the ideXlab platform.

  • dissecting the genetic architecture of shoot growth in carrot daucus carota l using a diallel Mating Design
    G3: Genes Genomes Genetics, 2018
    Co-Authors: Sarah D Turner, Paul L Maurizio, William Valdar, Brian S Yandell, Philipp W Simon
    Abstract:

    Crop establishment in carrot ( Daucus carota L.) is limited by slow seedling growth and delayed canopy closure, resulting in high management costs for weed control. Varieties with improved growth habit ( i.e. , larger canopy and increased shoot biomass) may help mitigate weed control, but the underlying genetics of these traits in carrot is unknown. This project used a diallel Mating Design coupled with recent Bayesian analytical methods to determine the genetic basis of carrot shoot growth. Six diverse carrot inbred lines with variable shoot size were crossed in WI in 2014. F1 hybrids, reciprocal crosses, and parental selfs were grown in a randomized complete block Design with two blocks in WI (2015) and CA (2015, 2016). Measurements included canopy height, canopy width, shoot biomass, and root biomass. General and specific combining abilities were estimated using Griffing’s Model I, which is a common analysis for plant breeding experiments. In parallel, additive, inbred, cross-specific, and maternal effects were estimated from a Bayesian mixed model, which is robust to dealing with data imbalance and outliers. Both additive and nonadditive effects significantly influenced shoot traits, with nonadditive effects playing a larger role early in the growing season, when weed control is most critical. Results suggest the presence of heritable variation and thus potential for improvement of these phenotypes in carrot. In addition, results present evidence of heterosis for root biomass, which is a major component of carrot yield.

  • dissecting the genetic architecture of shoot growth in carrot daucus carota l using a diallel Mating Design
    bioRxiv, 2017
    Co-Authors: Sarah D Turner, Paul L Maurizio, William Valdar, Brian S Yandell, Philipp W Simon
    Abstract:

    Crop establishment in carrot (Daucus carota L.) is limited by slow seedling growth and delayed canopy closure, resulting in high management costs for weed control. Varieties with improved growth habit (i.e. larger canopy and increased shoot biomass) may help mitigate weed control, but the underlying genetics of these traits in carrot is unknown. This project used a diallel Mating Design coupled with recent Bayesian analytical methods to determine the genetic basis of carrot shoot growth. Six diverse carrot inbred lines with variable shoot size were crossed in WI in 2014. F1 hybrids, reciprocal crosses, and parental selfs were grown in a randomized complete block Design (RCBD) with two blocks in CA (2014, 2015) and in WI (2015). Measurements included canopy height, canopy width, shoot biomass, and root biomass. General and specific combining abilities were estimated using Griffing’s Model I. In parallel, additive, inbreeding, epistatic, and maternal effects were estimated from a Bayesian linear mixed model, which is more robust to dealing with missing data, outliers, and theoretical constraints than traditional biometric methods. Both additive and non-additive effects significantly influenced shoot traits, with non-additive effects playing a larger role early in the growing season, when weed control is most critical. Results suggest that early season canopy growth and root size express hybrid vigor and can be improved through reciprocal recurrent selection.

E. Teissier Du Cros - One of the best experts on this subject based on the ideXlab platform.

  • Molecular genetics of rust resistance in poplars (Melampsora larici-populina Kleb/Populus sp.) by bulked segregant analysis in a 2 x 2 factorial Mating Design.
    Genetics, 1996
    Co-Authors: M Villar, H D Bradshaw, François Lefevre, E. Teissier Du Cros
    Abstract:

    With random amplified polymorphic DNA (RAPD) markers, we have tagged a genomic region in Populus sp. involved in qualitative resistance to Melampsora larici-populina. Our approach was based on three steps: use of RAPD markers that can be quickly and efficiently researched; application of ``bulked segregant analysis'' technique on individuals of one interspecific family P. trichocarpa X P. deltoides to search for RAPD markers linked to resistance; and validation of these markers in two other families linked with the first one in a 2 X 2 factorial Mating Design. Of five detected markers, only one marker M03/04_480 was polymorphic in the three segregating families, involving 89 individuals and four different parents. We have estimated the recombination value of 1 cM with 1 cM sampling error.

  • Molecular Genetics of Rust Resistance in Poplars (Melampsora larici-populina Kleb/Populus sp.) by Bulked Segregant Analysis in a 2 × 2 Factorial Mating Design
    Genetics, 1996
    Co-Authors: M Villar, H D Bradshaw, François Lefevre, E. Teissier Du Cros
    Abstract:

    With random amplified polymorphic DNA (RAPD) markers, we have tagged a genomic region in Populus sp. involved in qualitative resistance to Melampsora larici-populina. Our approach was based on three steps: use of RAPD markers that can be quickly and efficiently researched; application of ``bulked segregant analysis'' technique on individuals of one interspecific family P. trichocarpa X P. deltoides to search for RAPD markers linked to resistance; and validation of these markers in two other families linked with the first one in a 2 X 2 factorial Mating Design. Of five detected markers, only one marker M03/04_480 was polymorphic in the three segregating families, involving 89 individuals and four different parents. We have estimated the recombination value of 1 cM with 1 cM sampling error.

M Villar - One of the best experts on this subject based on the ideXlab platform.

  • molecular genetics of rust resistance in poplars melampsora larici populina kleb populus sp by bulked segregant analysis in a 2 x 2 factorial Mating Design
    Genetics, 1996
    Co-Authors: M Villar, H D Bradshaw, François Lefevre, Teissier E Du Cros
    Abstract:

    With random amplified polymorphic DNA (RAPD) markers, we have tagged a genomic region in Populus sp. involved in qualitative resistance to Melampsora larici-populina. Our approach was based on three steps: use of RAPD markers that can be quickly and efficiently researched; application of ``bulked segregant analysis'' technique on individuals of one interspecific family P. trichocarpa X P. deltoides to search for RAPD markers linked to resistance; and validation of these markers in two other families linked with the first one in a 2 X 2 factorial Mating Design. Of five detected markers, only one marker M03/04_480 was polymorphic in the three segregating families, involving 89 individuals and four different parents. We have estimated the recombination value of 1 cM with 1 cM sampling error.

  • Molecular genetics of rust resistance in poplars (Melampsora larici-populina Kleb/Populus sp.) by bulked segregant analysis in a 2 x 2 factorial Mating Design.
    Genetics, 1996
    Co-Authors: M Villar, H D Bradshaw, François Lefevre, E. Teissier Du Cros
    Abstract:

    With random amplified polymorphic DNA (RAPD) markers, we have tagged a genomic region in Populus sp. involved in qualitative resistance to Melampsora larici-populina. Our approach was based on three steps: use of RAPD markers that can be quickly and efficiently researched; application of ``bulked segregant analysis'' technique on individuals of one interspecific family P. trichocarpa X P. deltoides to search for RAPD markers linked to resistance; and validation of these markers in two other families linked with the first one in a 2 X 2 factorial Mating Design. Of five detected markers, only one marker M03/04_480 was polymorphic in the three segregating families, involving 89 individuals and four different parents. We have estimated the recombination value of 1 cM with 1 cM sampling error.

  • Molecular Genetics of Rust Resistance in Poplars (Melampsora larici-populina Kleb/Populus sp.) by Bulked Segregant Analysis in a 2 × 2 Factorial Mating Design
    Genetics, 1996
    Co-Authors: M Villar, H D Bradshaw, François Lefevre, E. Teissier Du Cros
    Abstract:

    With random amplified polymorphic DNA (RAPD) markers, we have tagged a genomic region in Populus sp. involved in qualitative resistance to Melampsora larici-populina. Our approach was based on three steps: use of RAPD markers that can be quickly and efficiently researched; application of ``bulked segregant analysis'' technique on individuals of one interspecific family P. trichocarpa X P. deltoides to search for RAPD markers linked to resistance; and validation of these markers in two other families linked with the first one in a 2 X 2 factorial Mating Design. Of five detected markers, only one marker M03/04_480 was polymorphic in the three segregating families, involving 89 individuals and four different parents. We have estimated the recombination value of 1 cM with 1 cM sampling error.

E. S. A. Moustafa - One of the best experts on this subject based on the ideXlab platform.

  • Genetic Parameters of Some Wheat (Triticum aestivum L.) Genotypes Using Factorial Mating Design
    Journal of Agricultural Science, 2014
    Co-Authors: A. E. Badran, E. S. A. Moustafa
    Abstract:

    Using parents and Mating Designs appropriate in the field of conventional plant breeding are the beginning to successful plant breeding program. However, there are many factors that influence their choices of Mating Designs, such as genetic parameters, experimental conditions and other biological constraints used in the evaluation process. In this study, Two wheat ( Triticum aestivum L.) genotypes used as males while, fifteen used as females were assessed for yield and yield associated traits using North Carolina Design II (factorial Mating Design). The seventeen parents and their 30 F1 progenies were planted in randomized complete block Design with three replications in three sets , during the growing season 2009/2010 and 2010/2011 in Ras-Sudr Regoin , South of Sinai, Egypt. Highly significant differences among males, females and hybrids between them were observed for all traits except No. of tillers and weight of grains /spike for females and the hybrids between males and females. The dominance genetic variance was higher than additive genetic variance for all studied traits except grain and straw yield per plant. Both heritability in narrow sense and expected genetic advance as percent were relatively high for spike weight grain yield and straw yield per plant. Depending on the previous genetic parameters we can achieve a quick and easy insight to a successful assessment.

H D Bradshaw - One of the best experts on this subject based on the ideXlab platform.

  • molecular genetics of rust resistance in poplars melampsora larici populina kleb populus sp by bulked segregant analysis in a 2 x 2 factorial Mating Design
    Genetics, 1996
    Co-Authors: M Villar, H D Bradshaw, François Lefevre, Teissier E Du Cros
    Abstract:

    With random amplified polymorphic DNA (RAPD) markers, we have tagged a genomic region in Populus sp. involved in qualitative resistance to Melampsora larici-populina. Our approach was based on three steps: use of RAPD markers that can be quickly and efficiently researched; application of ``bulked segregant analysis'' technique on individuals of one interspecific family P. trichocarpa X P. deltoides to search for RAPD markers linked to resistance; and validation of these markers in two other families linked with the first one in a 2 X 2 factorial Mating Design. Of five detected markers, only one marker M03/04_480 was polymorphic in the three segregating families, involving 89 individuals and four different parents. We have estimated the recombination value of 1 cM with 1 cM sampling error.

  • Molecular genetics of rust resistance in poplars (Melampsora larici-populina Kleb/Populus sp.) by bulked segregant analysis in a 2 x 2 factorial Mating Design.
    Genetics, 1996
    Co-Authors: M Villar, H D Bradshaw, François Lefevre, E. Teissier Du Cros
    Abstract:

    With random amplified polymorphic DNA (RAPD) markers, we have tagged a genomic region in Populus sp. involved in qualitative resistance to Melampsora larici-populina. Our approach was based on three steps: use of RAPD markers that can be quickly and efficiently researched; application of ``bulked segregant analysis'' technique on individuals of one interspecific family P. trichocarpa X P. deltoides to search for RAPD markers linked to resistance; and validation of these markers in two other families linked with the first one in a 2 X 2 factorial Mating Design. Of five detected markers, only one marker M03/04_480 was polymorphic in the three segregating families, involving 89 individuals and four different parents. We have estimated the recombination value of 1 cM with 1 cM sampling error.

  • Molecular Genetics of Rust Resistance in Poplars (Melampsora larici-populina Kleb/Populus sp.) by Bulked Segregant Analysis in a 2 × 2 Factorial Mating Design
    Genetics, 1996
    Co-Authors: M Villar, H D Bradshaw, François Lefevre, E. Teissier Du Cros
    Abstract:

    With random amplified polymorphic DNA (RAPD) markers, we have tagged a genomic region in Populus sp. involved in qualitative resistance to Melampsora larici-populina. Our approach was based on three steps: use of RAPD markers that can be quickly and efficiently researched; application of ``bulked segregant analysis'' technique on individuals of one interspecific family P. trichocarpa X P. deltoides to search for RAPD markers linked to resistance; and validation of these markers in two other families linked with the first one in a 2 X 2 factorial Mating Design. Of five detected markers, only one marker M03/04_480 was polymorphic in the three segregating families, involving 89 individuals and four different parents. We have estimated the recombination value of 1 cM with 1 cM sampling error.