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首页> 外文期刊>American Journal of Experimental Agriculture >Assessment of Salinity Tolerance and Analysis of SSR Markers Linked with Saltol QTL in Sri Lankan Rice (Oryza sativa) Genotypes
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Assessment of Salinity Tolerance and Analysis of SSR Markers Linked with Saltol QTL in Sri Lankan Rice (Oryza sativa) Genotypes

机译：水稻（Oryza sativa）基因型耐盐性评估和与Saltol QTL相关的SSR标记分析

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Aim: This research was aimed at assessing Sri Lankan rice varieties for the salinity tolerance using morphological traits and to analyze the SSR markers closer to Saltol QTL of the chromosome 1 to be used in rice breeding and gene mapping studies. Place and Duration of Study: The research was conducted at the Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, from April 2013 to October 2013. Study Design: Morphological traits were analyzed by ANOVA and polymorphic bands obtained from SSR markers were analyzed by Jaccard’s similarity coefficient following the unweighted pair group method with arithmetic mean (UPGMA). Methodology: Morphological traits of twenty rice germplasm of Sri Lankan origin, including traditional and improved varieties were assessed under 12 dS/m saline stress and five SSR markers located between 10 -15 Mb to Saltol QTL were analyzed in relation to salinity tolerance. Results: A novel weighted indicator, Salinity Survival Index, revealed that Goda Wee, At354 and Al Wee varieties were highly salinity tolerant compared to the tested varieties including an accession of Pokkali and the morphological traits also showed the same validation. Diversity analysis of SSR marker alleles linked with Saltol QTL clustered the salinity tolerant and salinity susceptible germplasms as compatible with the distribution pattern of salinity survival index and the marker, RM1287 was more informative for the screening of rice germplasm for salinity tolerance. Conclusion: Information derived on morphological traits under salinity stress and the polymorphic SSR marker patterns obtained from tolerant and susceptible varieties near Saltol region would be useful in selecting parental lines from the tested varieties for rice breeding and gene mapping programs designed for salt tolerance.
机译：目的：本研究旨在利用形态性状评估斯里兰卡水稻品种的耐盐性，并分析更接近水稻第1号染色体Saltol QTL的SSR标记，用于水稻育种和基因作图研究。研究的地点和时间：该研究于2013年4月至2013年10月在斯里兰卡Wayamba大学农业和人工林管理学院进行。研究设计：通过ANOVA分析形态特征，并分析从SSR标记获得的多态性条带由Jaccard的相似系数遵循具有算术平均值（UPGMA）的非加权对群方法。方法：在12 dS / m盐胁迫下评估了斯里兰卡起源的20个水稻种质的形态特征，包括传统和改良品种，分析了5个位于Saltol QTL 10 -15 Mb之间的SSR标记与盐分耐受性的关系。结果：新的加权指标“盐度存活指数”显示，与包括Pokkali在内的被测品种相比，Goda Wee，At354和Al Wee品种具有较高的耐盐性，并且形态学特征也显示出相同的验证性。与Saltol QTL连锁的SSR标记等位基因的多样性分析将耐盐性和盐度敏感种质聚集在一起，与盐度生存指数和标记的分布模式兼容，RM1287对于筛选耐盐性水稻种质提供了更多信息。结论：从盐胁迫下获得的形态性状信息以及从萨尔特尔地区附近的耐性和易感品种获得的多态性SSR标记模式的信息，将有助于从受试品种中选择亲本，进行水稻育种和设计用于耐盐性的基因定位程序。

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