Designs and model effects definitions in the initial stage of a plant breeding program

Pesquisa Agropecuária Brasileira

Emanuel Fernando Maia De Souza²  Luiz Alexandre Peternelli²  Márcio Henrique Pereira Barbosa¹ 

[1] ,Universidade Federal de Viçosa Dep. de Informática Viçosa MG

关键词: augmented design;    incomplete block;    selection;    heritability;    sugarcane;    stochastic simulation;    delineamento aumentado;    bloco incompleto;    seleção;    herdabilidade;    cana-de-açúcar;    simulação estocástica;   

DOI  :  10.1590/S0100-204X2006000300001

来源: SciELO

【 摘 要 】

The objective of this work was to compare the relative efficiency of initial selection and genetic parameter estimation, using augmented blocks design (ABD), augmented blocks twice replicated design (DABD) and group of randomised block design experiments with common treatments (ERBCT), by simulations, considering fixed effect model and mixed model with regular treatment effects as random. For the simulations, eight different conditions (scenarios) were considered. From the 600 simulations in each scenario, the mean percentage selection coincidence, the Pearsons´s correlation estimates between adjusted means for the fixed effects model, and the heritability estimates for the mixed model were evaluated. DABD and ERBCT were very similar in their comparisons and slightly superior to ABD. Considering the initial stages of selection in a plant breeding program, ABD is a good alternative for selecting superior genotypes, although none of the designs had been effective to estimate heritability in all the different scenarios evaluated.

【 授权许可】

CC BY   
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