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Evaluación de la tolerancia a la salinidad en poblaciones segregantes F5 de arroz (Oryza sativa L.)

Authors: Fernando Cobos Mora; Luz Gómez Pando; Walter Reyes Borja; Edwin Hasang Moran;

Evaluación de la tolerancia a la salinidad en poblaciones segregantes F5 de arroz (Oryza sativa L.)

Abstract

Se evaluó la tolerancia a la salinidad de líneas avanzadas F5 de arroz, en poblaciones segregantes derivadas de cruces interespecíficos entre Oryza sativa L. ssp. japonica x Oryza rufipogon G. y de cruces de líneas de tipo japónicas; a través de indicadores fisiológicos. Se probaron 30 accesiones en dos ambientes (0,2 y 7,0 dS/m). En este análisis se consideró las diferencias entre el rendimiento de materia seca en condiciones óptimas y el rendimiento en condiciones de estrés (salinidad), para seleccionar los genotipos más tolerantes, fueron evaluados 8 índices de tolerancia: porcentaje de reducción relativa (RR%), índice de susceptibilidad a la salinidad (SSI), índice de intensidad de salinidad (SII), productividad media (MP), media geométrica de la productividad (GMP), tolerancia al estrés (TOL), índice de tolerancia a la salinidad (ITS) e intensidad del estrés (IS). Según la correlación de Pearson, los índices más adecuados para identificar genotipos tolerantes a salinidad fueron: RR%, MP, GMP, e ITS. El Índice de tolerancia a la salinidad (ITS), seleccionó al genotipo Puyón/JP003P11-103115 (7) como tolerante y a las líneas Puyón/JP002P8-30552 (6) y Puyón/JP002P8-294930 (11) como moderadamente tolerantes al estrés salino.

Keywords

genotipos, salinidad, índices de selección, gráficos tridimensionales.

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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