Evaluation of Top-Cross Popcorn Hybrids Using Mixed Linear Model Methodology

The market for popcorn (Zea mays L.) has been continuously growing in Brazil fact has required the development of cultivars adapted to local environmental conditions. For this reason, the analytical objectives of this study were to evaluate top-cross popcorn hybrids in relation to popping expansion...

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Autores principales:	Arnhold,Emmanuel, Mora,Freddy, G. Silva,Ricardo, I.V. Good-God,Pedro, Rodovalho,Marcos A
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2009
Materias:	popping expansion REML BLUP improvement
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000100006
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spelling	oai:scielo:S0718-583920090001000062018-10-01Evaluation of Top-Cross Popcorn Hybrids Using Mixed Linear Model MethodologyArnhold,EmmanuelMora,FreddyG. Silva,RicardoI.V. Good-God,PedroRodovalho,Marcos A popping expansion REML BLUP improvement The market for popcorn (Zea mays L.) has been continuously growing in Brazil fact has required the development of cultivars adapted to local environmental conditions. For this reason, the analytical objectives of this study were to evaluate top-cross popcorn hybrids in relation to popping expansion and grain yield in three different eco-geographic regions of Brazil, in order to estimate variance components using Restricted Maximum Likelihood (REML) and predict breeding values using Best Linear Unbiased Prediction (BLUP). Genetic evaluation considered a linear model with heterogeneous residual (environmental) variances. The Restricted Likelihood Ratio Test (RLRT) evidenced significant differences (p < 0.01) for the genotypic effect. Grain yield showed a moderate heritable trait (h² = 0.26-0.39). A higher additive genetic control was evidenced for popping expansion (h² = 0.58-0.85). Genetic correlations and Spearman coefficient between both traits were negative, indicating that selection based on grain yield would have a negative effect on popping expansion. The top-cross hybrids showed an adequate grain yield, whereas the quality of the popcorn was lower than commercial standards.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.69 n.1 20092009-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000100006en10.4067/S0718-58392009000100006
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	popping expansion REML BLUP improvement
spellingShingle	popping expansion REML BLUP improvement Arnhold,Emmanuel Mora,Freddy G. Silva,Ricardo I.V. Good-God,Pedro Rodovalho,Marcos A Evaluation of Top-Cross Popcorn Hybrids Using Mixed Linear Model Methodology
description	The market for popcorn (Zea mays L.) has been continuously growing in Brazil fact has required the development of cultivars adapted to local environmental conditions. For this reason, the analytical objectives of this study were to evaluate top-cross popcorn hybrids in relation to popping expansion and grain yield in three different eco-geographic regions of Brazil, in order to estimate variance components using Restricted Maximum Likelihood (REML) and predict breeding values using Best Linear Unbiased Prediction (BLUP). Genetic evaluation considered a linear model with heterogeneous residual (environmental) variances. The Restricted Likelihood Ratio Test (RLRT) evidenced significant differences (p < 0.01) for the genotypic effect. Grain yield showed a moderate heritable trait (h² = 0.26-0.39). A higher additive genetic control was evidenced for popping expansion (h² = 0.58-0.85). Genetic correlations and Spearman coefficient between both traits were negative, indicating that selection based on grain yield would have a negative effect on popping expansion. The top-cross hybrids showed an adequate grain yield, whereas the quality of the popcorn was lower than commercial standards.
author	Arnhold,Emmanuel Mora,Freddy G. Silva,Ricardo I.V. Good-God,Pedro Rodovalho,Marcos A
author_facet	Arnhold,Emmanuel Mora,Freddy G. Silva,Ricardo I.V. Good-God,Pedro Rodovalho,Marcos A
author_sort	Arnhold,Emmanuel
title	Evaluation of Top-Cross Popcorn Hybrids Using Mixed Linear Model Methodology
title_short	Evaluation of Top-Cross Popcorn Hybrids Using Mixed Linear Model Methodology
title_full	Evaluation of Top-Cross Popcorn Hybrids Using Mixed Linear Model Methodology
title_fullStr	Evaluation of Top-Cross Popcorn Hybrids Using Mixed Linear Model Methodology
title_full_unstemmed	Evaluation of Top-Cross Popcorn Hybrids Using Mixed Linear Model Methodology
title_sort	evaluation of top-cross popcorn hybrids using mixed linear model methodology
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2009
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000100006
work_keys_str_mv	AT arnholdemmanuel evaluationoftopcrosspopcornhybridsusingmixedlinearmodelmethodology AT morafreddy evaluationoftopcrosspopcornhybridsusingmixedlinearmodelmethodology AT gsilvaricardo evaluationoftopcrosspopcornhybridsusingmixedlinearmodelmethodology AT ivgoodgodpedro evaluationoftopcrosspopcornhybridsusingmixedlinearmodelmethodology AT rodovalhomarcosa evaluationoftopcrosspopcornhybridsusingmixedlinearmodelmethodology
_version_	1714205265744625664

Evaluation of Top-Cross Popcorn Hybrids Using Mixed Linear Model Methodology

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