[ABE-L] Ciclo de Palestras PPG em Estatística IM-UFRJ (07/10 às 15:30)

[Kelly Cristina]

Caros redistas,

dando continuidade ao Ciclo de Palestras do Programa de Pós-Graduação
em Estatística do IM-UFRJ, *na próxima 4a feira, 07/10/20, às 15:30*,
teremos a palestra do professor:

*Paulo Canas Rodrigues (UFBA)*

*Título: *Statistical challenges in genotype by environment interactions
and QTL by environment interactions

*Resumo: *When analyzing two-way data tables, with genotypes in the rows
and environments in the columns, it is frequent to observe differential
responses of genotypes across environments. This phenomenon is known as
genotype by environment interaction (GEI) and can be defined by the change
of genetic ranking of genotypes with the environment (e.g. in plant
sciences, a genotype that is superior at well-watered conditions may yield
poorly under dry conditions). The GEI can be expressed either as
crossovers, when two different genotypes change in rank order of
performance when evaluated in different environments, or inconsistent
responses of some genotypes across environments without changes in rank
order. One step further from the GEI can be made by considering the whole
genetic information and analyze the QTL (quantitative trait loci) by
environment interaction (QEI). To structure and better understand these
interactions, the use of modern statistical methods is required. In this
talk, I will present generalizations of two fixed effects models: the
additive main effects and multiplicative interaction (AMMI) model, and the
genotype plus genotype by environment interaction (GGE) model. These
generalizations are the robust AMMI and robust GGE models, which outperform
their classical counterparts when outlying observations are present in the
data. I will present model performance and comparison in terms of QTL
detection and QEI interpretation, by considering applications to simulated
and real data sets.

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A palestra ocorrerá remotamente, via Google Meets. Segue o link para o
acesso a sala: meet.google.com/ruv-ruxx-ehg . A sala será aberta sempre 10
minutos antes do início de cada sessão.

Contamos com a presença de vocês.
Acompanhem a atualização da programação do nosso ciclo de palestras no
sitio  www.dme.ufrj.br opção Atividades subopção Ciclo de Palestras. Para
ver palestras anteriores, se inscreva no nosso canal Ciclo de
Palestras Estatística
UFRJ  <https://www.youtube.com/channel/UCoLTqHW20Ne1qFYL2xYJOcg/featured>!

Atenciosamente,
-- 
*Kelly C. M. Gonçalves*
*Professora Adjunta III*
*Departamento de Métodos Estatísticos*
*Universidade Federal do Rio de Janeiro*
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