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首页> 外文期刊>African Journal of Biotechnology >Genetic adaptability of durum wheat to salinity level at germination stage
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Genetic adaptability of durum wheat to salinity level at germination stage

机译：硬粒小麦萌发期对盐度的遗传适应性

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Evaluation of genetic adaptability of durum wheat to different levels of salt was conducted?at the Faculty of Sciences,?University?of?Tunis?El?Manar, Tunis from April to May 2010?to improve salt tolerance during germination stage. For this purpose, two crosses and their progenies (F1, F2, BC1Ps and BC1Pr) were used based on shoot length at different salinity levels (0, 50, 75, 100, 150 and 200 mmol/L). Significant differences for salt tolerance between means of generations were observed in all the treatments. Separate generation means analysis indicated that inheritance of resistance to salt at germination stage was dependent upon the level of salinity. With low salinity level (50 and 75 mmol/L), only additive and dominance effects were implicated in the genetic control of this trait. For moderate salinity level (100 and 150 mmol/L) in the two crosses, genetic interactions were solicited and the di-genic epistatic model was sufficient to explain variation in generation means. However, for the 200 mmol/L treatment, none of these models explained the variations in generation means and probably, higher order interactions or genes linkage were solicited. The estimated values of narrow-sense heritability were dependent on the cross and the salinity level and ranged between 29 and 90%. The results of this study indicated that selection in specific environments is useful for enhancing resistance to salt, but it may not be effective in providing resistance across a wide range of environments.?Keys words:?Durum wheat, genetic-adaptability, salinity level.
机译：为了提高发芽期的耐盐性，2010年4月至5月在突尼斯的突尼斯大学El Manar大学科学学院对硬质小麦对不同盐水平的遗传适应性进行了评估。为此，基于不同盐度水平（0、50、75、100、150和200 mmol / L）的枝条长度，使用了两个杂交及其后代（F1，F2，BC1Ps和BC1Pr）。在所有处理中均观察到世代平均值之间耐盐性的显着差异。分离产生均值分析表明，发芽期对盐的抗性遗传取决于盐度水平。在低盐度水平（50和75 mmol / L）下，该性状的遗传控制仅涉及加性和显性作用。对于两个杂交中的适度盐度水平（100和150 mmol / L），进行了遗传相互作用，并且双基因上位性模型足以解释世代均值的变化。但是，对于200 mmol / L的处理，这些模型都无法解释生成方式的变化，并且可能需要更高阶的相互作用或基因连锁。狭义遗传力的估计值取决于杂交和盐度水平，介于29％和90％之间。这项研究的结果表明，在特定的环境中进行选择有助于增强对盐的抗性，但可能无法有效地在广泛的环境中提供抗性。关键词：硬粒小麦，遗传适应性，盐度水平。

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