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Genetic diversity of Sporisorium scitamineum in mainland China assessed by SCoT analysis

文献类型： 外文期刊

作者： Shen, Wan-kuan 1 ; Xu, Gang-hong 1 ; Luo, Ming-zhu 1 ; Jiang, Zi-de 2 ;

作者机构： 1.South China Agr Univ, Coll Agron, Minist Agr, Sci Observing & Expt Stn Crop Cultivat South Chin, Guangzhou 510642, Guangdong, Peoples R China

2.South China Agr Univ, Dept Plant Pathol, Guangdong Key Lab Microbial Signals & Dis Control, Guangzhou 510642, Guangdong, Peoples R China

关键词： Sporisorium scitamineum;Genetic diversity;Start codon targeted (SCoT) polymorphism;Sugarcane

期刊名称：TROPICAL PLANT PATHOLOGY （ 影响因子：1.488； 五年影响因子：1.675 ）

ISSN：

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收录情况： SCI

摘要： The genetic relationships among 90 mating-type isolates of Sporisorium scitamineum collected from mainland China were evaluated based on the start codon-targeted (SCoT) marker technique. Fourteen selected SCoT primers amplified 135 DNA fragments, of which 98 (72.6 %) were polymorphic. The polymorphic information content values ranged from 0.649 to 0.910 with an average of 0.820, indicating that a high degree of genetic diversity exists among these Chinese S. scitamineum isolates. Cluster groups identified using the unweighted pair-group method with arithmetic mean (UPGMA) and principal component analysis (PCA) were similar and divided the 90 S. scitamineum isolates into three main groups (G(1), G(2), and G(3)) based on a Jaccard's similarity coefficient of 0.74. The S. scitamineum isolates collected from the same province tended to cluster in the same main groups. This study showed that the genetic diversity of the 90 S. scitamineum isolates was associated with their geographic origin, with no evidence of coevolution between the host and S. scitamineum. The knowledge of genetic diversity of S. scitamineum is useful in breeding programs for development of smut-resistant sugarcane genotypes. The results of this study demonstrate that SCoT markers are informative and can be used to evaluate the genetic diversity of S. scitamineum.

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