Comprative study on rice germination and seedling growth under salinity and drought stresses

Environment, Biodiversity and Soil Security Pub Date : 2019-02-01 DOI:10.21608/JENVBS.2019.11933.1058

E. NegmM., Wael El Kallawy, A. G. Hefeina

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引用次数: 2

Abstract

This investigation was carried out in the lab of Rice Research and Training Center (RRTC), Sakha station, Kafrelsheikh, Filed Crops Research Institute Egypt, during 2017 and 2018 seasons, to study the inheritance of some germination and early seedling traits associated with salinity and drought tolerance. Eight rice genotypes namely; Sakha102, Sakha104, Sakha105, Sakha106, Giza178, A22, IRAT170, and WAB56-125 were evaluated under drought and salinity conditions. Significant genetic variation was found among rice cultivars for seedling vigor under salt and drought stress conditions. Thus, the selection for improved traits among these cultivars would be effective in all traits. The phenotypic coefficient variability (PCV %) was higher than genotypic coefficient variability (GCV %) for the all traits, indicating the existence of wide genetic variability among these genotypes. Under sever salt stress, A22 followed by WAB56-125 were the most tolerant rice genotypes which can be used for cultivation under salt stress conditions. Furthermore, Sakha104 was the best genotype under water deficit for most studied traits followed by IRAT170 and could use to improve the drought tolerance in breeding programs.

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盐胁迫和干旱胁迫下水稻发芽和幼苗生长的比较研究

本研究于2017年和2018年在埃及大田作物研究所Kafrelsheikh Sakha站水稻研究与培训中心(RRTC)实验室进行，旨在研究与耐盐和耐旱相关的一些发芽和早苗性状的遗传。8种水稻基因型;分别对Sakha102、Sakha104、Sakha105、Sakha106、Giza178、A22、IRAT170和WAB56-125进行了干旱和盐胁迫评价。在盐胁迫和干旱胁迫条件下，水稻品种间幼苗活力存在显著遗传变异。因此，在这些品种中选择改良性状对所有性状都是有效的。所有性状的表型变异系数(PCV %)均高于基因型变异系数(GCV %)，表明这些基因型之间存在广泛的遗传变异。在严重盐胁迫条件下，A22和WAB56-125是最耐盐的水稻基因型，可用于盐胁迫条件下的栽培。此外，在水分亏缺条件下，Sakha104是大多数性状的最佳基因型，IRAT170次之，可用于提高水稻的抗旱性。

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Environment, Biodiversity and Soil Security

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