آثار عوامل اقلیمی بر ریسک عملکرد لاین‌های گندم آبی در تحقیقات به‏ نژادی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 استادیار پژوهش دفتر پژوهش‏های اقتصادی- اجتماعی و تجاری سازی؛ مؤسسه تحقیقات اصلاح و تهیه نهال و بذر، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرج، ایران.

2 دانشیار گروه اقتصاد دانشکده مدیریت و اقتصاد، دانشگاه سیستان و بلوچستان، زاهدان، ایران.

3 استاد گروه اقتصاد کشاورزی، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران.

4 محقق ارشد مرکز بین‏المللی تحقیقات ذرت و گندم در ایران، کرج، ایران

چکیده

امروزه، تغییرات اقلیمی از متغیرهای کلیدی و تأثیرگذار در رشد عملکرد محصولات به‏شمار می‏رود. هدف پژوهش حاضر تعیین اثرات اقلیمی و روند زمانی و مکانی بر بهبود ژنتیکی لاین­های گندم آبی در تحقیقات به­نژادی کشور بود. داده­های پانل مطالعه از 22 ایستگاه تحقیقات کشاورزی طی دوره 1393-1374 جمع­آوری شد. در مطالعة حاضر، از تابع تولید تصادفی جاست و پاپ استفاده شد. نتایج نشان داد که متغیر روند زمانی تأثیر مثبت و معنی­دار بر ریسک و میانگین عملکرد لاین­ها دارد، به‏گونه‏ای که میانگین عملکرد سالانه را 29 کیلوگرم در هکتار بهبود بخشیده است. اثر سال معرفی رقم بر میانگین و واریانس عملکرد لاین­ها مثبت و از لحاظ آماری معنی­دار بود. همچنین، اثر میانگین درجه حرارت و بارندگی در فصول مختلف بر میانگین و واریانس عملکرد لاین­ها از لحاظ آماری معنی­دار ارزیابی شد.

کلیدواژه‌ها


عنوان مقاله [English]

Impacts of Climate Factors on Risk of Yield of Irrigated Wheat Lines in Breeding Researches

نویسندگان [English]

  • hormoz asadi 1
  • Gholamreza Zamanian 2
  • Mohammad.Nabi Shahiki Tash 2
  • Mohammad Ghorbani 3
  • Mohammad Reza Jalal Kamali 4
1 Assistant Professor, Socio-economic and Trade Researches Office, Seed and Plant Improvement Institute, Agricultural Research, Education and Extension Organization, Karaj, Iran
2 Associate Professor in Economic, Faculty of Management and Economics, University of Sistan and Baluchestan, Zahedan ,Iran.
3 Professor in Agricultural Economics, Faculty of Agriculture, Ferdowsi University of Mashhad, Iran.
4 Principal Scientist, International Maize and Wheat Research Center (CIMMYT) in Iran, Karaj, Iran.
چکیده [English]

Today, climatic change is known as a key and effective variable on growth in crop yield. This aimed at determining the effect of environmental factors, time trend and places variables on improved genetic of irrigated bread wheat lines in breeding program in different research stations of Iran. The required panel data were collected from 22 locations in breeding program of irrigated bread wheat during 1995-2014. The study was conducted in a stochastic production function of Just and Pope. According to the results, the impact of time trend on mean yield and risk variance of the irrigated wheat lines was estimated positive and significant, improving the annual mean yield by 29 kg/ha. The impact of released year on mean and variance of the irrigated wheat lines was estimated positive and statistically significant as well. The impacts of mean temperature (0C) and amounts of raining (mm) in different seasons on mean and variance of the irrigated wheat lines were estimated significant.

کلیدواژه‌ها [English]

  • irrigated wheat
  • research
  • Stochastic Production Function
  • environmental factors
  • Time trend
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