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واکنش متفاوت دورگ‌های بین گونهای صنوبر به تکثیر از طریق ریزازدیادی | ||
| تحقیقات ژنتیک و اصلاح گیاهان مرتعی و جنگلی ایران | ||
| مقاله 4، دوره 25، شماره 1 - شماره پیاپی 49، خرداد 1396، صفحه 43-56 اصل مقاله (486.7 K) | ||
| نوع مقاله: مقاله علمی - پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijrfpbgr.2017.109817 | ||
| نویسندگان | ||
| صدف خسروان1؛ حسین میرزایی‌ندوشن* 2؛ عباس قمری زارع3؛ محمدعلی ابراهیمی4 | ||
| 1کارشناس ارشد، دانشگاه پیام نور، تهران | ||
| 2عضو هیئت علمی مؤسسه تحقیقات جنگلها و مراتع کشور | ||
| 3دانشیار، مؤسسه تحقیقات جنگلها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران | ||
| 4دانشیار، دانشگاه پیام نور، تهران | ||
| چکیده | ||
| گونههای مختلف صنوبر قابلیتهای متفاوتی دارند که آنها را از هم متمایز میکند. ولی این تفاوتها موجب شده است که برخی از گونهها در شرایط متضاد اقلیمی سازگاری پیدا کنند. دورگ‌های بین این گونهها نیز قابلیتهای بینابینی از خود نشان میدهند که ممکن است بتوانند دامنه اکولوژیک صنوبرها را گسترش دهند. در این تحقیق سه پایه از دورگ‌های بین گونهای حاصل از تلاقی بین دو گونه از صنوبر بهنامهای سپیدار (Populus alba)و پده(Populus euphratica) با ریزازدیادی تکثیر شدند تا ضمن بهینه‌کردن روش تکثیر این دورگ‌ها، تفاوتهای احتمالی واکنش بهریزازدیادی در آنها نیز بررسی شود. در بخش پرآوری دورگ‌های مورد مطالعه واکنش‌های متفاوتی بهمحیط کشت‌های مورد استفاده از خود نشان دادند، بهطوریکه یکی از دورگ‌ها در سطوح سه‌گانه محیط‌های پرآوری، بهمیزان زیادی ریشه هم تولید کرد. این دورگ در مرحله پرآوری از نظر صفاتی مانند تعداد شاخه، طول شاخه، تعداد جوانه‌های جانبی و مقدار ریشه برتری زیادی نسبت به سایر پایهها از خود نشان داد. در مرحله ریشه‌زایی هم پایه برتر در مرحله تکثیر، برتری ویژهای از نظر تعداد و طول ریشه از خود نشان داد. سهولت در ریشه‌دهی یکی از دورگ‌ها، که در صورت انتخاب بهعنوان یک رقم تجاری باید بهصورت رویشی تکثیر و توسعه داده شود، می‌تواند امتیاز ویژهای برای این دورگ باشد. البته اثر متقابل موجود بین دو عامل مورد مطالعه هم در بیشتر موارد برتری یکی از دورگ‌ها را نشان داد. | ||
| کلیدواژه‌ها | ||
| ریزازدیادی؛ تکثیر غیرجنسی؛ دورگ بین گونهای؛ صنوبر؛ سپیدار؛ پده | ||
| عنوان مقاله [English] | ||
| Different responses of poplar inter-specific hybrids to micropropagation | ||
| نویسندگان [English] | ||
| S. Khosravan1؛ H. Mirzaie-Nodoushan2؛ A. Ghamari Zare3؛ M.A. Ebrahimi4 | ||
| 1M.Sc. Payamnoor University, Tehran, I.R.Iran | ||
| 2Prof., Forests and Rangelands Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Tehran, I.R. Iran. | ||
| 3Associ. Prof., Forests and Rangelands Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Tehran, I.R. Iran. | ||
| 4Associ. Prof., Payamnoor University, Tehran, I.R.Iran. | ||
| چکیده [English] | ||
| Populus species have distinct capabilities for which they are clearly differentiated. But the different capabilities made the species to be adapted to divergent climatic conditions. Inter-specific hybrids between the species have inter-mediate capabilities for which they may extend ecologic distribution of the genus. Asexual propagation of three inter-specific hybrid genotypes between two poplar species, Populus alba and P. euphratica were propagated through micropropagation technique, in order to optimize aseptic asexual propagation of the hybrids as well as investigating possible differences between the genotypes in responding to the propagation method. The hybrids showed different responses to three culture media so that one of the hybrids, in contrast to other hybrids, even produced plenty of roots in proliferation phase. The mentioned hybrid was highly superior to others, based on the recorded characteristics such as stem number, stem length, bud number and root score. The hybrids were significantly different based on their responses to rooting culture media. The superior hybrid of proliferation phase, showed superiority in rooting phase as well. In case of selection of the superior hybrid as a commercial cultivar, it should be propagated by cutting, for which easiness of rooting may be its specific and noticeable character. Interaction effects between the two factors, hybrids and culture media, also revealed the superiority of the mentioned hybrid. | ||
| کلیدواژه‌ها [English] | ||
| Asexual propagation, Micropropagation, Inter-specific hybrid, Poplar, Populus alba, Populus euphratica | ||
| مراجع | ||
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