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Selection of genotypes and genetic parameters of mamona influenced by fixed, random and mixed models

Grant number: 18/14148-3
Support type:Scholarships in Brazil - Master
Effective date (Start): December 01, 2018
Effective date (End): July 31, 2019
Field of knowledge:Agronomical Sciences - Agronomy
Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal Investigator:Maria Márcia Pereira Sartori
Grantee:Gabriela Nunes da Piedade
Home Institution: Faculdade de Ciências Agronômicas (FCA). Universidade Estadual Paulista (UNESP). Campus de Botucatu. Botucatu , SP, Brazil


The use of more refined genetic-statistical procedures is still infrequent in the routine of breeding programs in general, including castor bean, and it is also unusual to estimate variance components and genetic parameters from this. In order to select the superior genotypes and to compare the components of variance obtained through fixed, random and mixed models, as well as to verify the implications of the estimation of the parameters of the genetic improvement of castor bean, experiments were carried out in the years 2014 and 2015 in the cities of Botucatu, Ilha Solteira, Penápolis and São Manuel, at the time of sowing of the crop. 20 lines (Ricinus communis L.) were used in a randomized block design with three replicates, for all experiments. After the complete development of the plants, the average grain yield was calculated. Individual analyzes of variance will be performed for each experiment, followed by analyzes of joint variance, considering the fixed, random and mixed models. After the expected mean squares are known, the variance components associated with the random effects and the quadratic components associated with the fixed effects will be estimated for each model. Subsequently, these values will be used to calculate the main parameters used in breeding programs. The analyzes will be carried out using the SAS 9.4 software, using the MIXED procedure.

Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
PIEDADE, Gabriela Nunes da. Seleção genotípica e parâmetros genéticos da mamona influenciados por modelos fixos, aleatórios e mistos. 2019. Master's Dissertation - Universidade Estadual Paulista "Júlio de Mesquita Filho" Faculdade de Ciências Agronômicas (Campus de Botucatu)..

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