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Mostrando ítems 1-20 de 29
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An assessor-specific Bayesian multi-threshold mixed model for analyzing ordered categorical traits in tree breeding
Cappa, Eduardo Pablo; Varona, Luis (Springer, 2013-12)Many traits of biological interest in tree breeding are assessed using more than two ordered discrete categories. These scores have a more or less arbitrary and subjective assignment by the assessors, which could lead to ... -
Breeding value predictive accuracy for scarcely recorded traits in a Eucalyptus grandis breeding population using genomic selection and data on predictor traits
Jurcic, Esteban Javier; Villalba, Pamela Victoria; Dutour, Joaquín; Centurión, Carmelo; Munilla, Sebastián; Cappa, Eduardo Pablo (Springer, 2023-07-18)Genomic selection methods are particularly useful for traits that are difcult or expensive to measure. We investigated the impact of using predictor growth traits and/or genomic information to increase the breeding value ... -
Decoupling of height growth and drought or pest resistance tradeoffs is revealed through multiple commongarden experiments of lodgepole pine
Liu, Yang; Erbilgin, Nadir; Cappa, Eduardo Pablo; Chen, Charles; Ratcliffe, Blaise; Wei, Xiaojing; Klutsch, Jennifer G.; Ullah, Aziz; Sebastian Azcona, Jaime; Thomas, Barb R.; El-Kassaby, Yousry A. (Oxford University Press, 2023-03)The environment could alter growth and resistance tradeoffs in plants by affecting the ratio of resource allocation to various competing traits. Yet, how and why functional tradeoffs change over time and space is poorly ... -
Efficient genomics-based ‘end-to-end’ selective tree breeding framework
El-Kassaby, Yousry A.; Cappa, Eduardo Pablo; Chen, Charles; Ratcliffe, Blaise; Porth, Ilga M. (Springer Nature, 2024-01-03)Since their initiation in the 1950s, worldwide selective tree breeding programs followed the recurrent selection scheme of repeated cycles of selection, breeding (mating), and testing phases and essentially remained unchanged ... -
Genetic parameters for growth, stem straightness, and branch quality for Pinus elliottii var. elliottii × Pinus caribaea var. hondurensis F1 Hybrid in Argentina
Belaber, Ector; Gauchat, Maria Elena; Reis, Hugo D.; Borralho, Nuno M.; Cappa, Eduardo Pablo (Oxford University Press, 2018-11)Genetic parameters for growth, stem straightness, and branch quality were estimated in five progeny trials of Pinus elliottii var. elliottii (PEE) × Pinus caribaea var. hondurensis (PCH) F1 hybrid measured at ages three, ... -
Genomic evaluation for breeding and genetic management in Cordia africana, a multipurpose tropical tree species
Ousmael, Kedra M.; Cappa, Eduardo Pablo; Hansen, Jon K.; Hendre, Prasad; Hansen, Ole K. (BMC, 2024-01-02)Planting tested forest reproductive material is crucial to ensure the increased resilience of intensively managed productive stands for timber and wood product markets under climate change scenarios. Single-step Genomic ... -
Genomic selection in forest trees comes to life: unraveling its potential in an advanced four - generation Eucalyptus grandis population
Duarte, Damían; Jurcic, Esteban Javier; Dutour, Joaquín; Villalba, Pamela Victoria; Centurion, Carmelo; Grattapaglia, Darío; Cappa, Eduardo Pablo (Frontiers Media, 2024-10-03)Genomic Selection (GS) in tree breeding optimizes genetic gains by leveraging genomic data to enable early selection of seedlings without phenotypic data reducing breeding cycle and increasing selection intensity. Traditional ... -
Genomic-based multiple-trait evaluation in Eucalyptus grandis using dominant DArT markers
Cappa, Eduardo Pablo; El-Kassaby, Yousry A.; Muñoz, Facundo; Garcia, Martin Nahuel; Villalba, Pamela Victoria; Klapste, Jaroslav; Marcucci Poltri, Susana Noemi (2018-06)We investigated the impact of combining the pedigree- and genomic-based relationship matrices in a multiple-trait individual-tree mixed model (a.k.a., multiple-trait combined approach) on the estimates of heritability and ... -
Identification and joint modeling of competition effects and environmental heterogeneity in three Douglas-fir (Pseudotsuga menziesii var. menziesii) trials
Cappa, Eduardo Pablo; Stoehr, Michael U.; Chang-Yi, Xie; Yanchuk, Alvin D. (2016-12)(Co)variance matrices for the assumed model, and thus the specification of the dispersion parameters, should take into account both the negative competition and the positive spatial correlations. In this context, we applied ... -
Impacts of population structure and analytical models in genome-wide association studies of complex traits in forest trees: a case study in Eucalyptus globulus
Cappa, Eduardo Pablo; El Kassaby, Yousry A.; Garcia, Martin Nahuel; Acuña, Cintia Vanesa; Borralho, Nuno M.; Grattapaglia, Dario; Marcucci Poltri, Susana Noemi (Plos One, 2013-11-25)The promise of association genetics to identify genes or genomic regions controlling complex traits has generated a flurry of interest. Such phenotype-genotype associations could be useful to accelerate tree breeding cycles, ... -
Improving accuracy of breeding values by incorporating genomic information in spatial - competition mixed models
Cappa, Eduardo Pablo; El-Kassaby, Yousry A.; Muñoz, Facundo; Garcia, Martin Nahuel; Villalba, Pamela Victoria; Klapste, Jaroslav; Marcucci Poltri, Susana Noemi (2017-10)Climate change and the increasing demand for sustainable energy resources require urgent strategies to increase the accuracy of selection in tree breeding (associated with higher gain). We investigated the combined pedigree ... -
Improving genomic prediction of growth and wood traits in Eucalyptus using phenotypes from non-genotyped trees by single-step GBLUP
Cappa, Eduardo Pablo; de Lima, Bruno Marco; Silva-Junior, Orzenil B. da; García, Carla C.; Mansfield, Shawn D.; Grattapaglia, Dario (Elsevier, 2019-03-28)Genomic Best Linear Unbiased Prediction (GBLUP) in tree breeding typically only uses information from genotyped trees. However, information from phenotyped but non-genotyped trees can also be highly valuable. The single-step ... -
Improving lodgepole pine genomic evaluation using spatial correlation structure and SNP selection with single-step GBLUP
Cappa, Eduardo Pablo; Ratcliffe, Blaise; Chen, Charles; Thomas, Barb R.; Liu, Yang; Klutsch, Jennifer G.; Azcona, Jaime Sebastian; Benowicz, Andy; Sadoway, Shane; Erlilgin, Nadir; El-Kassaby, Yousry A. (Springer Nature, 2022-02-18)Modeling environmental spatial heterogeneity can improve the efficiency of forest tree genomic evaluation. Furthermore, genotyping costs can be lowered by reducing the number of markers needed. We investigated the impact ... -
Increment coring induced traumatic resin ducts in white spruce but not in lodgepole pine
Klutsch, Jennifer G.; Kee, Chen X.; Cappa, Eduardo Pablo; Ratcliffe, Blaise; Thomas, Barb R.; Erbilgin, Nadir (2020-01-30)Injury from sampling increment cores may induce defense responses in trees, which may vary between species and reflect differing defense allocation strategies against attack by insects and pathogens. We recorded presence ... -
Integrating genomic information and productivity and climate-adaptability traits into a regional white spruce breeding program
Cappa, Eduardo Pablo; Klutsch, Jennifer G.; Sebastian-Azcona, Jaime; Ratcliffe, Blaise; Xiaojing, Wei; Da Ros, Letitia; Yang, Liu; Chen, Charles; Benowicz, Andy; Sadoway, Shane; Mansfield, Shawn D.; Erbilgin, Nadir; Thomas, Barb R.; El-Kassaby, Yousry A. (Plos ONE, 2022-03)Tree improvement programs often focus on improving productivity-related traits; however, under present climate change scenarios, climate change-related (adaptive) traits should also be incorporated into such programs. ... -
Multiple-trait analyses improved the accurary of genomic prediction and the power of genome-wide association of productivity and climate change-adaptive traits in lodgepole pine
Cappa, Eduardo Pablo; Chen, Charles; Klutsch, Jennifer G.; Azcona, Jaime Sebastián; Ratcliffe, Blaise; Wei, Xiaojing; Da Ros, Letitia; Ullah, Aziz; Liu, Yang; Benowicz, Andy; Sadoway, Shane; Mansfield, Shawn D.; Erbilgin, Nadir; Thomas, Barb R.; El-Kassaby, Yousry A. (BMC, 2022-07-23)Genomic prediction (GP) and genome-wide association (GWA) analyses are currently being employed to accelerate breeding cycles and to identify alleles or genomic regions of complex traits in forest trees species. Here, 1490 ... -
Multiple‑trait analyses improved the accuracy of genomic prediction and the power of genome‑wide association of productivity and climate change‑adaptive traits in lodgepole pine
Cappa, Eduardo Pablo; Chen, Charles; Klutsch, Jennifer G.; Sebastian-Azcona, Jaime; Ratcliffe, Blaise; Wei, Xiaojing; Da Ros, Letitia; Ullan, Aziz; Liu, Yang; Bernowicz, Andy; Sadoway, Shane; Mansfield, Shawn D.; Erbilgin, Nadir; Thomas, Barb R.; El-Kassaby, Yousry A. (BMC, 2022-07-23)Genomic prediction (GP) and genome-wide association (GWA) analyses are currently being employed to accelerate breeding cycles and to identify alleles or genomic regions of complex traits in forest trees species. Here, 1490 ... -
A novel individual-tree mixed model to account for competition and environmental heterogeneity: a Bayesian approach
Cappa, Eduardo Pablo; Muñoz, Facundo; Sanchez, Leopoldo; Cantet, Rodolfo Juan Carlos (Springer, 2015-12)Negative correlation caused by competition among individuals and positive spatial correlation due to environmental heterogeneity may lead to biases in estimating genetic parameters and predicting breeding values (BVs) from ... -
Optimizing a regional white spruce tree improvement program: SNP genotyping for enhanced breeding values, genetic diversity assessment, and estimation of pollen contamination
Galeano, Esteban; Cappa, Eduardo Pablo; Bousquet, Jean; Thomas, Barb R. (MDPI, 2023-11-01)The utilization of genotyping has gained significant popularity in tree improvement programs, aiding in enhancing the precision of breeding values, removing pedigree errors, the assessment of genetic diversity, and evaluating ... -
Performance of alternative spatial models in empirical Douglas-fir and simulated datasets
Cappa, Eduardo Pablo; Muñoz, Facundo; Sánchez, Leopoldo (Springer, 2019-05-13)Based on an empirical dataset originating from the French Douglas-fir breeding program, we showed that the bidimensional autoregressive and the two-dimensional P-spline regression spatial models clearly outperformed the ...