Research Institute of Forests and Rangelands The Iranian Journal of Botany 1029-788X 28 1 2022 06 22 Karyotype analysis of three species from the western regions of Iran بررسی کاریوتیپی سه گونه از مناطق غربی ایران 64 68 126964 10.22092/ijb.2022.126964 EN Anahita Shariat Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization (AREEO). Tehran, Iran. Adel Jalili Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization (AREEO). Tehran, I.R. Iran. 0000-0001-6494-181X Saeedeh Sadat Mirzadeh Vaghefi Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization (AREEO). Tehran, I.R. Iran Masoumeh Khanhasani Kermanshah Agricultural and Natural Resources Research and Education Centre, Agricultural Research, Education and Extension Organization (AREEO), Kermanshah, I.R. Iran. Journal Article 2021 12 26 Three plant species belonging to three genera of Apiaceae, Boraginaceae & Poaceae were collected from wetlands in western regions of Iran. The chromosomal count of <em>Leiotulus porphyrodiscus </em>(Stapf & Wettst.)<em> </em>Pimenov & Ostr. (2<em>n</em> = 22) is reported for the first time, and the chromosome count of <em>Arrhenatherum elatius</em> (L.) P. Beauv. ex J. Presl & C. Presl (2<em>n</em> = 28) is reported for the first time for the flora of Iran. The number of chromosomes in <em>Echium italicum </em>L. (2<em>n </em>= 16) is reported from Kermanshah Province. Karyomorphological parameters such as karyotypic formula, Romero-Zarco indices, Stebbins class, and other karyotypic symmetry indices were determined for all species. سه گونه گیاهی متعلق به سه تیره Apiaceae, Boraginaceae, Poaceae از مناطق ماندابی غرب کشور جمع‌آوری گردید. شمارش کروموزومی برای گونه Leiotulus porphyrodiscus (Stapf & Wettst.) Pimenov & Ostr. (2n = 22) برای اولین بار و شمارش کروموزومی گونه Arrhenatherum elatius (L.) P. Beauv. ex J. Presl & C. Presl (2n = 28) برای اولین بار در فلور ایران و در گونهEchium italicum L.  نیز 2n = 16 از استان کرمانشاه گزارش می‌گردند. پارامترهای کاریومورفولوژیکی از جمله فرمول کاریوتیپی، شاخص‏های رومروزرکو، کلاس Stebbins و سایر شاخص‏های تقارن کاریوتیپی برای همه گونه‌ها تعیین شد. https://ijb.areeo.ac.ir/article_126964_d57046fe867cea5c33f52590469c5d96.pdf