Indirect selection of maize genotypes based on associations between root agronomic and anatomical characters

ABSTRACT Indirect selection based on highly correlated characters is a common strategy in genetic improvement to quickly and accurately identify genotypes with good agronomic characteristics. The objective of this research study was to quantify existing associations between root agronomic and anatom...

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Autores principales:	Nascimento-Júnior,Ivanildo, Moro,Gustavo V., Moro,Fabíola V.
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2018
Materias:	Canonical correlation correlation between characters multivariate analysis Zea mays
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392018000100039
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spelling	oai:scielo:S0718-583920180001000392018-04-25Indirect selection of maize genotypes based on associations between root agronomic and anatomical charactersNascimento-Júnior,IvanildoMoro,Gustavo V.Moro,Fabíola V. Canonical correlation correlation between characters multivariate analysis Zea mays ABSTRACT Indirect selection based on highly correlated characters is a common strategy in genetic improvement to quickly and accurately identify genotypes with good agronomic characteristics. The objective of this research study was to quantify existing associations between root agronomic and anatomical characters in maize (Zea mays L.) populations for possible indirect selection. The following agronomic characters were considered: Plant height, ear insertion height, relative ear position, plant lodging, plant breakage, and grain productivity. Measured anatomical characters included total root area, central cylinder area, epidermis thickness, exodermis thickness, endodermis thickness, cortical parenchyma thickness, number of metaxylem vessels, phloem area, cortex thickness, and metaxylem area. The genotypic correlation analysis showed significant associations at the 1% probability level between the following anatomical and agronomic characters: Endodermis thickness and plant height, exodermis thickness and plant breakage, and exodermis thickness and grain productivity. The canonical analysis of variance showed significant effects by the chi-square test for three of the five canonical pairs. The first canonical pair showed a positive relationship between plant height and total root area (4.142) and a negative relationship with the central cylinder area (-4.080), indicating that genotypes with greater total root area and lower central cylinder area can give rise to larger plants. These results indicated the possibility of an indirect selection of taller or shorter plants in the earlier growth stages using anatomical root characters.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.78 n.1 20182018-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392018000100039en10.4067/S0718-58392018000100039
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Canonical correlation correlation between characters multivariate analysis Zea mays
spellingShingle	Canonical correlation correlation between characters multivariate analysis Zea mays Nascimento-Júnior,Ivanildo Moro,Gustavo V. Moro,Fabíola V. Indirect selection of maize genotypes based on associations between root agronomic and anatomical characters
description	ABSTRACT Indirect selection based on highly correlated characters is a common strategy in genetic improvement to quickly and accurately identify genotypes with good agronomic characteristics. The objective of this research study was to quantify existing associations between root agronomic and anatomical characters in maize (Zea mays L.) populations for possible indirect selection. The following agronomic characters were considered: Plant height, ear insertion height, relative ear position, plant lodging, plant breakage, and grain productivity. Measured anatomical characters included total root area, central cylinder area, epidermis thickness, exodermis thickness, endodermis thickness, cortical parenchyma thickness, number of metaxylem vessels, phloem area, cortex thickness, and metaxylem area. The genotypic correlation analysis showed significant associations at the 1% probability level between the following anatomical and agronomic characters: Endodermis thickness and plant height, exodermis thickness and plant breakage, and exodermis thickness and grain productivity. The canonical analysis of variance showed significant effects by the chi-square test for three of the five canonical pairs. The first canonical pair showed a positive relationship between plant height and total root area (4.142) and a negative relationship with the central cylinder area (-4.080), indicating that genotypes with greater total root area and lower central cylinder area can give rise to larger plants. These results indicated the possibility of an indirect selection of taller or shorter plants in the earlier growth stages using anatomical root characters.
author	Nascimento-Júnior,Ivanildo Moro,Gustavo V. Moro,Fabíola V.
author_facet	Nascimento-Júnior,Ivanildo Moro,Gustavo V. Moro,Fabíola V.
author_sort	Nascimento-Júnior,Ivanildo
title	Indirect selection of maize genotypes based on associations between root agronomic and anatomical characters
title_short	Indirect selection of maize genotypes based on associations between root agronomic and anatomical characters
title_full	Indirect selection of maize genotypes based on associations between root agronomic and anatomical characters
title_fullStr	Indirect selection of maize genotypes based on associations between root agronomic and anatomical characters
title_full_unstemmed	Indirect selection of maize genotypes based on associations between root agronomic and anatomical characters
title_sort	indirect selection of maize genotypes based on associations between root agronomic and anatomical characters
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2018
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392018000100039
work_keys_str_mv	AT nascimentojuniorivanildo indirectselectionofmaizegenotypesbasedonassociationsbetweenrootagronomicandanatomicalcharacters AT morogustavov indirectselectionofmaizegenotypesbasedonassociationsbetweenrootagronomicandanatomicalcharacters AT morofabiolav indirectselectionofmaizegenotypesbasedonassociationsbetweenrootagronomicandanatomicalcharacters
_version_	1714205375058673664

Indirect selection of maize genotypes based on associations between root agronomic and anatomical characters

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