Generational Mean Analysis of Salt Tolerance during Osmotic Phase in Maize Seedling

This study details the nature and magnitude of the genetic effects associated with various quantitative characters (morphological and hydric relations) measured in maize seedlings during the osmotic phase of saline stress (100 mM NaCl). Three lines with differential behavior in salt stress: SC2 (tol...

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Autores principales: Collado, Mónica B., Aulicino, Mónica Beatriz, Arturi, Miguel Jacinto, Molina, María del Carmen
Formato: Articulo
Lenguaje:Inglés
Publicado: 2019
Materias:
Ciencias Agrarias
Maize
Salinity
Osmotic Stress Tolerance
Genetic Effects
Generation Means Analysis
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/81086
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-81086
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Agrarias
Maize
Salinity
Osmotic Stress Tolerance
Genetic Effects
Generation Means Analysis
spellingShingle Ciencias Agrarias
Maize
Salinity
Osmotic Stress Tolerance
Genetic Effects
Generation Means Analysis
Collado, Mónica B.
Aulicino, Mónica Beatriz
Arturi, Miguel Jacinto
Molina, María del Carmen
Generational Mean Analysis of Salt Tolerance during Osmotic Phase in Maize Seedling
topic_facet Ciencias Agrarias
Maize
Salinity
Osmotic Stress Tolerance
Genetic Effects
Generation Means Analysis
description This study details the nature and magnitude of the genetic effects associated with various quantitative characters (morphological and hydric relations) measured in maize seedlings during the osmotic phase of saline stress (100 mM NaCl). Three lines with differential behavior in salt stress: SC2 (tolerant), AFE (susceptible) and LP3 (moderately tolerant) were used to obtain contrasting crosses (SC2 × AFE) and (SC2 × LP3). An analysis of six generational means (P 1, P 2, F 1, F 2, BC1 and B C 2) was applied for each cross. First a scaling test was applied and then a three and six-parameter genetic models were used to estimate various genetic components. In none of the traits studied there was evidence of adequacy to the three parameter model, which indicates important epistatic effects in genetic expression. The dominant genetic effects were greater than the additive ones for all the characters evaluated. LG showed positive and significant differences for [h] in both crosses, indicating the presence of hybrid vigor and its possible use in the improvement. Low value of [d] and high of [h] both significant in SC2 × AFE, indicates existence of genes dispersion between the parental lines. While, for the cross SC2 × LP3, the low and significant value of [d] and not significant value of [h], indicate greater genetic similarity. In the SC2 × LP3 cross, the negative interaction [l ] confirms ambidirectional dominance, while for SC2 × LP3 the positive sign indicates directional dominance. The analysis of tolerance to salinity in the osmotic phase showed a complex polygenic inheritance for the traits used, determined by simple and interaction effects of different magnitudes and significance according to the cross considered.
format Articulo
Articulo
author Collado, Mónica B.
Aulicino, Mónica Beatriz
Arturi, Miguel Jacinto
Molina, María del Carmen
author_facet Collado, Mónica B.
Aulicino, Mónica Beatriz
Arturi, Miguel Jacinto
Molina, María del Carmen
author_sort Collado, Mónica B.
title Generational Mean Analysis of Salt Tolerance during Osmotic Phase in Maize Seedling
title_short Generational Mean Analysis of Salt Tolerance during Osmotic Phase in Maize Seedling
title_full Generational Mean Analysis of Salt Tolerance during Osmotic Phase in Maize Seedling
title_fullStr Generational Mean Analysis of Salt Tolerance during Osmotic Phase in Maize Seedling
title_full_unstemmed Generational Mean Analysis of Salt Tolerance during Osmotic Phase in Maize Seedling
title_sort generational mean analysis of salt tolerance during osmotic phase in maize seedling
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/81086
work_keys_str_mv AT colladomonicab generationalmeananalysisofsalttoleranceduringosmoticphaseinmaizeseedling
AT aulicinomonicabeatriz generationalmeananalysisofsalttoleranceduringosmoticphaseinmaizeseedling
AT arturimigueljacinto generationalmeananalysisofsalttoleranceduringosmoticphaseinmaizeseedling
AT molinamariadelcarmen generationalmeananalysisofsalttoleranceduringosmoticphaseinmaizeseedling
bdutipo_str Repositorios
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