عنوان

ارزیابی مقاومت به خشکی ارقام بهاره کلزا

Number

‭۱۴۷پ‬

.Language of Text, Soundtrack etc

per

Title Proper

ارزیابی مقاومت به خشکی ارقام بهاره کلزا

First Statement of Responsibility

/فاطمه شیخ

Name of Publisher, Distributor, etc.

تبریز: دانشگاه تبریز

Specific Material Designation and Extent of Item

‮‭۱۶۳‬ ص، جدول، نمودار، عکس، لوح فشرده‬

Text of Note

چاپی

Text of Note

واژه نامه

Text of Note

کتابنامه ص.: ‮‭۱۵۲-۱۶۱‬

Dissertation or thesis details and type of degree

کارشناسی ارشد

Discipline of degree

مهندسی کشاورزی-اصلاح نباتات

Date of degree

‮‭۱۳۸۲/۱۲/۲۵‬

Body granting the degree

تبریز: دانشگاه تبریز

Text of Note

گیاه کلزا بعد ازسویا وپنبه دانه مقام سوم را از نظر تامین روغن نباتی جهان را دارد .وجود روغن زیاد در دانه‌های کلزا و همچنین ترکیب مناسب اسیدهای چرب آن موجب تسلط این گیاه بربازارهای جهانی شده است .تنش کمبود آب درمراحل گلدهی تا پر شدن دانه‌ها موجب افت شدیدی درعملکرد کلزا می‌شود .نظر به بروز تنش کمبود آب همزمان با این مرحله در اکثر مناطق کشور مطالعه تنش کمبود آب بر روی کلزا از اهمیت ویژه‌ای برخوردار می‌باشد .هدف اصلی این پژوهش ارزیابی اثر کمبود رطوبت روی صفات فیزیولوژیک و مرفولوژیک درگیر در افزایش مقاومت به خشکی و گزینش ارقام مقاوم به خشکی کلزا می باشد .آزمایش در سال زراعی ‮‭۱۳۸۱‬ به باطرح پایه بلوکهای کامل تصادفی در ‮‭۸‬ تکرار در مزرعه تحقیقاتی دانشکده کشاورزی دانشگاه تبریز و تحت دو محیط پیاده گردید .دو سطح آبیاری عادی وتنش کمبود آب محیطهای آزمایش را تشکیل دادند .ژنوتیپ‌های مورد مطالعه شامل ‮‭Global ,Puma ,Regent ,Eureka‬ و ‮‭PF۷۰۴۵.۹۱‬ازگونه ناپوس،‮‭Sonja‬ و ‮‭Parkland‬ازگونه راپا و دو هیبرید به نامهای ‮‭Hyola ۳۰۸‬و ‮‭Hyola ۴۰۱‬بودند .در محیط تنش کمبود آب از تاریخ ‮‭۵۰‬ گلدهی آبیاری متوقف گردید.صفات فیزیولوژیک وزراعی مورد بررسی شامل پتانسیل آب برگ، وزن ویژه برگ، مقدار آب نسبی برگ، ارتفاع بوته، وزن خشک بوته، تعداد و طول خورجین بودند .علاوه بر این صفات مورفولوژیکی ریشه نظیر ماکزیمم طول ریشه،حجم ریشه، وزن خشک ریشه، ضخامت ریشه و نسبت وزنی و طولی ریشه به شاخساره نیز مورد اندازه‌گیری و محاسبه قرار گرفتند .محاسبات آماری از قبیل تجزیه واریانس، مقایسات گروهی، همبستگی ساده بین صفات، تجزیه همبستگی کانونیک، تجزیه کلاسترو تجزیه تابع تشخیص انجام گرفت

Text of Note

Canola has the third grade in providing oil after soybean and cottonseed. The high oil content of canola seeds and suitable component of ureic acid in its oil, have made it as a dominative in world markets.Water deficit at flowering and grain filling stages of rapeseed caused high decrease in yield in the most regions of Iran. So studying the effect of water deficit on canola has a special important. The main purpose of this study was evaluation the effect of water deficit on morphological and physiological effective characters and comparison of genotypes with respect to drought. The experiment was carried out at research farm of Factually of Agriculture, University of Tabriz, Tabriz, Iran. This experiment was carried out under two condition namely normal and water deficit environment arranged in RCBD with 8 replications. Genetic material was constituted of Global, Puma, Regent, Eureka and PF 7045.91 from napus species, Sonja and Parkland from rapa species and two hybrid namely Hyola308 and Hyola401. Stopping the irrigation at 50 flowering imposed water deficitSome agronomical and physiological characteristics including leaf water potential, specific leaf weight, relative water tent were measured along with plant height, shoot dry weight, crop temperature stability, number and length of silique. In addition root morphological characters including maximum root length, root volume, root number, root thickness, root dry weight, root to shoot dry weight ratio and root to shoot dry length ratio was measured/calculated. Data was subjected to ANOVA, group comparisons, single correlation between character, canonical correlation, cluster analysis and discernment analysis.The result showed that water deficit had significant effect on all the traits studied except crop temperature stability, root number, root thickness and root dry weight. The reduction in soil water was reduced plant height, number and length of silique, relative water content and leaf water potential, shoot dry weight and root to shoot dry weight and root to shoot dry length ratio. There were significant differences between two environment as well as genotypes with respect to most of characters studied except root thickness and dry weight. There were significant differences between three genotypic groups at least in one of environments. Orthogonal contrast showed that Argentinean cultivar was better than other groups. Among Argentinean cultivars global had higher plant height, shoot dry weight and the number of silique than others, followed by Puma and PF 7045.91. These three cultivars had highest maximum root length, root volume and root thickness. There was significant and positive correlation between plant height, number of silique, shoot dry weight, root volume and root dry weight. In water deficit environment there were significant and positive correlation between plant height, number of silique, root volume and shoot dry weight. Maximum root length was highly and positively correlated with root to shoot dry weight ratio and root to shoot dry length ratio in water deficit environment. Canonical correlation analysis was showed high correlation between root morphological and shoot related characters in normal as well as water deficit environments. Cluster analysis based on Oqlidos distance and Ward method divided genotypes into two general groups in the normal and water deficit codition. Discernment analysis for three genotypic groups Argentinean, Polish and Hybrid showed the significant role of root number, maximum root length, shoot and root dry weight and root to shoot dry weight ratio characters, in recognition of these the grouped.

Drought Resistance

Spring Rapeseed Cultivars

Cultivars

شیخ، فاطمه

ولی زاده، مصطفی، استاد راهنما

تورچی، محمود، استاد راهنمای همکار

شکیبا، محمدرضا، استاد مشاور

پاسبان اسلام، بهمن، استاد مشاور همکار

Public note

سیاه و سفید

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