Abstract
The genetic diversity of 34 A. desertorum accessions was studied using 28 ISSR primers. A total of 448 loci were amplified in the A. desertorum genome, and 402 (90%) of them were polymorphic. The primer (AG)8YC produced the greatest number of polymorphic fragments, while the primer (AC)8YA produced the lowest number. The number of effective alleles ranged between 1.26 and 1.57. The highest value of Shanon index belonged to primer (GA)8T, while the highest value of Nei index (0.33) was detected for primers (GA)8T, (TC)8C, and (GACA)4. Primer (GA)8GCC with PIC = 0.40 was the best informative marker in the evaluation of A. desertorum genetic diversity. Genetic similarity among studied accessions was between 0.45 (G03 and G17) and 0.80 (G01 and G11). Using Bayesian and WPGMA classification algorithms, the A. desertorum germplasm was divided into two major subgroups (Red and Green), which consisted of 13 and 17 accessions, respectively, and also admixture accessions. Late-maturing accessions were distinguished from early-maturing accessions and mostly localized in the Green subgroup. The Red subgroup had more private alleles as well as heterozygosity compared with the Green subgroup and therefore also had promising selection potential. Totally, ISSR markers could distinguish early mature genotypes, and this is significant for increased forage yield. Likewise, the recognized heterotic groups could help breeders select highly polymorphic genotypes in polycross breeding.
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The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.
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Acknowledgment
The authors thank the University of Maragheh and the Agricultural Biotechnology Research Institute of Iran for lab facilities.
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This work was supported by university of Maragheh and Author Hamid Hatami Maleki has received research support from University of Maragheh.
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by RM and HHM, MH, MA, MR and HHM. The first draft of the manuscript was written by HHM and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Maleki, H.H., Mohammadi, R., Arshad, M. et al. Genetic variability and population structure of Agropyron desertorum accessions from Iran based on inter simple sequence repeat (ISSR) assay. Genet Resour Crop Evol 70, 2511–2520 (2023). https://doi.org/10.1007/s10722-023-01579-8
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DOI: https://doi.org/10.1007/s10722-023-01579-8