Variables de tamaño y forma de granos y embriones de trigo (Triticum aestivum L.): análisis y propuestas

The aims of this work were to discriminate among a group of variables of size and shape of wheat grains and embryos, some of direct measurement or primary variables (VP) and others derived from them or secondary variables (VS), those which were most adequate to describe these two characteristics, th...

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Autores principales: Manfreda, Vilma Teresa, Acosta, María Cecilia
Formato: Online
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Publicado: Facultad de Ciencias Agrarias-UNCuyo 2015
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Acceso en línea:https://revistas.uncu.edu.ar/ojs3/index.php/RFCA/article/view/3271
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spelling I11-R107article-32712022-11-09T18:10:17Z Size and shape variables of wheat grains and embryos: analyses and suggestions Variables de tamaño y forma de granos y embriones de trigo (Triticum aestivum L.): análisis y propuestas Manfreda, Vilma Teresa Acosta, María Cecilia Triticum aestivum tamaño de embriones forma de embriones tamaño de granos forma de granos Triticum aestivum embryo size embryo shape grain size grain shape The aims of this work were to discriminate among a group of variables of size and shape of wheat grains and embryos, some of direct measurement or primary variables (VP) and others derived from them or secondary variables (VS), those which were most adequate to describe these two characteristics, those equivalent or redundant, and to improve or propose new variables. Grains of a wide size range of two wheat cultivars, which visually differ in shape, were studied. The grains were produced in a three-year field experiment. The first axis (67.77% of the variance) obtained by Principal Component Analysis was associated with VP and VS of both grain and embryo size, while second axis (16.73% of the variance) was associated with VS of shape. Some variables, such as embryos Length and Form-density factor, presented mixed or unexpected associations. It is suggested a modified Form-density factor (Ffdm) which showed a low number of significant correlations with size VP. Also, it was possible to propose two new variables: one that evaluates the shape of grains (Desf AN) and the other, the relative embryo-grain size (Le/Lg). Both variables could differentiate between cultivars, were not affected by production year, and showed few significant correlations with VP. Los objetivos de este trabajo fueron identificar, de un conjunto de variables de tamaño y forma de granos y embriones de trigo, unas de medición directa o primarias (VP) y otras derivadas de ellas o secundarias (VS), las más adecuadas para describir estos dos aspectos, las equivalentes o redundantes, y mejorar o proponer nuevas variables. Se estudiaron un amplio rango de tamaño de granos de dos cultivares de trigo con formas visualmente distintas, producidos en parcelas experimentales a campo en tres años. Del Análisis de Componentes Principales se obtuvo un primer eje (67,77% de la varianza) al que se asociaron VP y VS del tamaño de granos y de embriones, mientras que al segundo (16,73% de la varianza) las VS de formas. Algunas variables, como Largo de embriones y Factor forma-densidad, presentaron asociaciones mixtas o inesperadas. Se propone un Factor forma-densidad modificado (Ffdm) de reducida cantidad de correlaciones significativas con las VP de tamaño. Se proponen, además, dos nuevas variables, una que evalúa la forma de los granos (Desf AN) y otra el tamaño relativo entre embrión y grano (Le/Lg). Ambas se diferenciaron entre cultivares, no fueron afectadas por el año de producción y presentaron pocas correlaciones significativas con las VP. Facultad de Ciencias Agrarias-UNCuyo 2015-06-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.uncu.edu.ar/ojs3/index.php/RFCA/article/view/3271 Revista de la Facultad de Ciencias Agrarias UNCuyo; Vol. 47 No. 1 (2015): Janury-June; 43-58 Revista de la Facultad de Ciencias Agrarias UNCuyo; Vol. 47 Núm. 1 (2015): Enero-Junio; 43-58 1853-8665 0370-4661 spa https://revistas.uncu.edu.ar/ojs3/index.php/RFCA/article/view/3271/2394
institution Universidad Nacional de Cuyo
building Revistas en línea
filtrotop_str Revistas en línea
collection Revista de la Facultad de Ciencias Agrarias
journal_title_str Revista de la Facultad de Ciencias Agrarias
institution_str I-11
repository_str R-107
language spa
format Online
author Manfreda, Vilma Teresa
Acosta, María Cecilia
spellingShingle Manfreda, Vilma Teresa
Acosta, María Cecilia
Variables de tamaño y forma de granos y embriones de trigo (Triticum aestivum L.): análisis y propuestas
Triticum aestivum
tamaño de embriones
forma de embriones
tamaño de granos
forma de granos
Triticum aestivum
embryo size
embryo shape
grain size
grain shape
author_facet Manfreda, Vilma Teresa
Acosta, María Cecilia
author_sort Manfreda, Vilma Teresa
title Variables de tamaño y forma de granos y embriones de trigo (Triticum aestivum L.): análisis y propuestas
title_short Variables de tamaño y forma de granos y embriones de trigo (Triticum aestivum L.): análisis y propuestas
title_full Variables de tamaño y forma de granos y embriones de trigo (Triticum aestivum L.): análisis y propuestas
title_fullStr Variables de tamaño y forma de granos y embriones de trigo (Triticum aestivum L.): análisis y propuestas
title_full_unstemmed Variables de tamaño y forma de granos y embriones de trigo (Triticum aestivum L.): análisis y propuestas
title_sort size and shape variables of wheat grains and embryos: analyses and suggestions
description The aims of this work were to discriminate among a group of variables of size and shape of wheat grains and embryos, some of direct measurement or primary variables (VP) and others derived from them or secondary variables (VS), those which were most adequate to describe these two characteristics, those equivalent or redundant, and to improve or propose new variables. Grains of a wide size range of two wheat cultivars, which visually differ in shape, were studied. The grains were produced in a three-year field experiment. The first axis (67.77% of the variance) obtained by Principal Component Analysis was associated with VP and VS of both grain and embryo size, while second axis (16.73% of the variance) was associated with VS of shape. Some variables, such as embryos Length and Form-density factor, presented mixed or unexpected associations. It is suggested a modified Form-density factor (Ffdm) which showed a low number of significant correlations with size VP. Also, it was possible to propose two new variables: one that evaluates the shape of grains (Desf AN) and the other, the relative embryo-grain size (Le/Lg). Both variables could differentiate between cultivars, were not affected by production year, and showed few significant correlations with VP.
publisher Facultad de Ciencias Agrarias-UNCuyo
publishDate 2015
url https://revistas.uncu.edu.ar/ojs3/index.php/RFCA/article/view/3271
topic Triticum aestivum
tamaño de embriones
forma de embriones
tamaño de granos
forma de granos
Triticum aestivum
embryo size
embryo shape
grain size
grain shape
topic_facet Triticum aestivum
tamaño de embriones
forma de embriones
tamaño de granos
forma de granos
Triticum aestivum
embryo size
embryo shape
grain size
grain shape
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