بررسی اثرات تنش خشکی بر عملکرد و اجزای عملکرد پنبه با استفاده از تجزیه بای پلات

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی سابق کارشناسی ارشد دانشکده کشاورزی دانشگاه زابل

2 دانشیار دانشکده کشاورزی دانشگاه زابل

3 استادیار دانشکده کشاورزی دانشگاه بیرجند

چکیده

به‌­منظورارزیابی اثر تنش خشکی بر عملکرد و اجزای آن در پنبه و انتخاب بهترین رقم، 14 رقم پنبه در قالب  طرح بلوک کامل تصادفی با سه تکرارطی سال زراعی 1391 و تحت دو شرایط آبیاری معمول و تنش خشکی در مزرعه تحقیقاتی مرکز آموزش فنی و حرفه­ای شهرستان نهبندان مورد مطالعه قرار گرفتند. نتایج تجزیه واریانس نشان داد که بین ارقام مورد بررسی از نظر کلیه صفاتاختلاف معنی­دار (01/0≥p)وجود دارد و تنش خشکی برروی صفاتی نظیر تعداد روز تا گلدهی، ارتفاع بوته، تعداد شاخه زایا، وزن وش، تعداد غوزه در بوته و درصدکیل الیاف تاثیرگذار بوده است. صفات تعداد غوزه در بوته، تعداد شاخه زایا، ارتفاعودرصد کیل الیاف همبستگی مثبت و معنی‎داربا عملکرد داشتند. صفات ارتفاع، تعداد شاخه زایا، تعداد روز تاگلدهی،درصد کیل الیاف و تعداد غوزه در بوته تاثیر بیشتری بر روی عملکرد داشتند و 71 درصد تغییرات عملکرد وش را توجیه نمودند. درتجزیه بای‎پلات صفات تعداد شاخه زایاو تعداد غوزه در بوته به عنوان صفات متمایز کننده (صفاتی که باعث تفاوت بین ارقام می‎شوند) و عملکرد به­عنوان نماینده صفات معرفی شدند. ارقام ورامین وبختگاندارای عملکرد بالا بودند. همچنین ارقام ورامین، بختگان، مهر و ساحل عملکرد پایدارتری داشتند. رقم ورامین نزدیک­ترین رقم به رقم ایده­آل (رقمی فرضی که دارای بیشترین و پایدارترینعملکرد باشد) بود.

کلیدواژه‌ها

عنوان مقاله [English]

The study of drought stress effects on yield and yield components of cotton using biplot analysis

نویسندگان [English]

  • Ahmad Kamali 1
  • Barat Ali Fakheri 2
  • Mohammad Zabet 3
1 Former MSc. Student, Faculty of Agriculture, University of Zabol
2 Associate Professor, Faculty of Agriculture, University of Zabol
3 Assistant Professor,Faculty of Agriculture, University of Birjand
چکیده [English]

In order to evaluate the effect of drought stress on yield and yield components of cottonand selection of  the best cultivars, an experiment was conducted as complete randomized block design (RCBD) with three replications on 14 cotton cultivars at Agricultural Research farm of Technical and Vocational Training center, Nehbandan, Khorasanjonobi under normal irrigation and drought stress in 2012. The results of variance analysis showed that there was significant difference among cultivars for all traits under stress and non-stress conditions. The effects of drought stress was significant on day number to flowering, plant height, number of sympodial branches, cotton yield,  number of boll per plant and lint percentage. The assessment of simple correlation coefficient showed that the yield was positively and significantly correlated number of bolls per plant, number of sympodial branch, plant height and lint percentage. The traits of plant height, number of sympodial branches, day number to flowering, lint percentage and number of bolls per plant can be considered as the best indices for yield improving. In analysis of biplots, traits of numbers of sympodial branches and bolls per plant were as distinguishing traits and cotton yield was as traits representative. Also cultivars of Varamin, Bakhtegan, Mehr and Sahel had more stable yield.  Varamin cultivar was similar to ideal cultivar.

کلیدواژه‌ها [English]

  • Cotton
  • Drought tolerance
  • Biplot analysis
  • Cultivar

مراجع

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