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4. Molecular characterization of the wild relatives of wheat using CAAT-box derived polymorphism.

Author

Etminan, Alireza, Pour-Aboughadareh, Alireza, Mehrabi, Ali Ashraf, Shooshtari, Lia, Ahmadi-Rad, Amin, and Moradkhani, Hoda

Subjects
GENETIC markers, RELATIVES, ANALYSIS of variance, AEGILOPS, GENE flow
Abstract

A molecular assessment of genetic diversity was performed on a set of 228 selected accessions belonging to the different Aegilops and Triticum species using CAAT-box derived polymorphism (CBDP) markers. Fifteen CBDP primers generated 141 polymorphic fragments with an average of 9.40 per primer. The average of polymorphic information content and resolving power revealed a high efficiency of CBDP markers in analyzing genetic diversity among different wheat genotypes. The diversity indexes including polymorphic loci percent, number of observed and effective alleles, Shannon's index and gene diversity among different populations were 76.24%, 1.67, 1.49, 0.42 and 0.28, respectively. These essentially coincided with the analysis of molecular variance results, indicating that 86, 68, and 59.46% of genetic variation were found within two Aegilops and Triticum genera and their populations, respectively. Genetic relationships inferred from cluster analysis was matched with STRUCTURE analysis, disclosing the accessions were grouped based on their genomic constitution. Furthermore, these results were confirmed by principal coordinate analysis (PCoA). Taken together, our results suggest that CBDP markers will be useful for genetic diversity assessment in the domesticated and wild relatives of wheat. [ABSTRACT FROM AUTHOR]

Published
2019
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5. Genetic relationships and diversity among wild Salviaaccessions revealed by ISSR and SCoT markers

Author

Etminan, Alireza, Pour-Aboughadareh, Alireza, Noori, Afsaneh, Ahmadi-Rad, Amin, Shooshtari, Lia, Mahdavian, Zahra, and Yousefiazar-Khanian, Masoumeh

Abstract

ABSTRACTIn this study, inter-simple sequence repeats (ISSR) and start codon targeted (SCoT) markers were used for genetic diversity and relationship analysis of nine Salviaspecies. Twenty-one and twenty selected ISSR and SCoT primers amplified 350 and 329 loci, respectively, of which all were polymorphic. The obtained average polymorphism information content (ISSR, 0.38; SCoT, 0.40), average band informativeness (ISSR, 16.67; SCoT, 16.45) and resolving power (ISSR, 9.75; SCoT, 12.52) revealed high genetic diversity prevailing among Salviaaccessions. Considering the ISSR and SCoT data, the species with a basic chromosome number of x= 8 showed higher values of the percentage polymorphism loci (PPL), the number of observed alleles (Na) and Shannon index (I) than the other species. The partition of clusters in the neighbour-joining dendrogram based on ISSR, SCoT and combined data was similar and grouped all individuals into four clusters. However, the dendrogram generated based on SCoT separated the individuals into sub-clusters in accordance with their species and section. The Mantel test revealed a similar polymorphism distribution pattern between ISSR and SCoT techniques, the correlation coefficient (r) was 0.83, and the results showed that both techniques were effective to assess the genetic diversity. Our results indicated that SCoT markers can be used as a reliable and informative technique for evaluation of genetic diversity and relationships among Salviaspecies.

Published
2018
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