ارزیابی هیبریدهای جدید چغندرقند براساس شاخصهای تحمل به تنش در شرایط شور | ||
| خشک بوم | ||
| مقاله 4، دوره 5، شماره 1، شهریور 1394، صفحه 44-54 اصل مقاله (317.09 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| نویسندگان | ||
| زهرا عباسی* 1؛ احمد ارزانی2؛ محمد مهدی مجیدی3؛ پریسا مشایخی4 | ||
| 1دانشجو ی سابق دکترا اصلاح نباتات - دانشگاه صنعتی اصفهان و محقق مرکز تحقیقات کشاورزی و منابع طبیعی اصفهان | ||
| 2استاد دانشگاه صنعتی | ||
| 3دانشیار دانشگاه صنعتی | ||
| 4مرکز تحقیقات کشاورزی و منابع طبیعی اصفهان | ||
| چکیده | ||
| به منظور بررسی هیبریدهای جدید چغندرقند از نظر تحمل به شوری، 20 هیبرید سینگل کراس حاصل از تلاقی 5 والد گردهافشان دیپلوئید با 4 والد نرعقیم (حاصل از طرح ژنتیکی فاکتوریل) به همراه والدین تلاقی در ایستگاه تحقیقات شوری رودشت در دو سال زراعی 1392-1391 ارزیابی شدند. در هرسال ژنوتیپها در دو آزمایش تحت شرایط تنش شوری (هدایت الکتریکی آب و خاک به ترتیب حدود 12 و 8 دسی زیمنس بر متر) و بدون تنش (هدایت الکتریکی آب و خاک حدود 4 دسی زیمنس بر متر) در قالب طرح بلوکهای کامل تصادفی با 2تکرار (در سال اول) و 3 تکرار (در سال دوم) مطالعه شدند. بر مبنای عملکرد قند در شرایط تنش و بدون تنش، چهار شاخص تحمل به تنش (STI)، پتانسیل ظهور مزرعه (FEP)، شاخص تحمل چغندرقند (BTI) و تحمل به خشکی (DTI) محاسبه شدند. تحلیل رگرسیونی عملکرد قند در دو شرایط با شاخصهای مذکور نشان داد که شاخصهای تحمل STI و BTI به علت دارا بودن بیشترین ضریب رگرسیون با عملکرد قند در هر دو شرایط، مناسبترین شاخصها برای شناسایی هیبریدهای متحمل به شوری شناخته شدند. بر اساس نتایج بدست آمده از تجزیه خوشهای، هیبریدهای 3×2، 1×3، 3×5 و 4×5 به عنوان هیبریدهای متحمل با پتانسیل عملکرد بالا برای محیطهای دارای تنش شوری و هیبریدهای 1×1، 4×2، 3×4، 2×3و 2×5 به عنوان هیبریدهای حساس با پتانسیل عملکرد پایین برای محیطهای شور معرفی گردیدند. | ||
| کلیدواژهها | ||
| تنش شوری؛ چغندرقند؛ شاخصهای تحمل؛ عملکرد قند؛ هیبرید | ||
| عنوان مقاله [English] | ||
| Investigation of new sugar beet hybrids by tolerance indices in salt condition | ||
| چکیده [English] | ||
| In order to evaluate of new sugar beet hybrids for salt tolerance, 20 single cross hybrids produced by crosses between 5 diploid pollinators as male and 4 cytoplasmic male sterile as females ( caused by factorial design) along with parents were investigated in Rudasht salinity research station in 2012 and 2013. In each year, genotypes were studied in two experiments under saline (EC for water and soil about 12 and 8 dS/m respectively) and non-saline field conditions (EC for water and soil about 4 dS/m) using a randomized complete block design with two and three replications in first and second year, respectively. Four salt tolerance indices including salt tolerance index (STI), field emergency potential (FEP), beet tolerance index (BTI) and drought tolerance index (DTI) were calculated based on sugar yield in stress and non-stress condition. Regression analysis of sugar yield in two conditions with these indices showed that STI and BTI had significantly positive relationship coefficient with sugar yield under both stress and non-stress conditions suggesting that these indices are more efficient for determining salt tolerant genotypes. In based on the results of cluster analysis, hybrids 2×3, 3×1, 5×3 and 5×4 were recognized as salt tolerant hybrids with high yield and hybrids 1×1, 2×4, 4×3, 3×2 and 5×2 were introduced as susceptible hybrids with low yield for salinity condition. | ||
| کلیدواژهها [English] | ||
| Salinity stress, Sugar beet, tolerance index, Sugar yield, Hybrids | ||
| مراجع | ||
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