The impact of terminal heat stress on yield and heat tolerance of bread wheat

نویسندگان

  • A. Moshatati Department of Agronomy and Plant Breeding, Ramin Agriculture and Natural Resources University of Khouzestan, Ahwaz, Iran. b
  • A.M. Bakhshandeh Department of Agronomy and Plant Breeding, Ramin Agriculture and Natural Resources University of Khouzestan, Ahwaz, Iran.
  • Kh. Alami-Saeid Department of Agronomy and Plant Breeding, Ramin Agriculture and Natural Resources University of Khouzestan, Ahwaz, Iran.
  • M.R. Jalal-Kamali International Maize and Wheat Improvement Center (CIMMYT), Karaj, Iran
  • S.A. Siadat Department of Agronomy and Plant Breeding, Ramin Agriculture and Natural Resources University of Khouzestan, Ahwaz, Iran.
چکیده مقاله:

In arid and semi-arid regions of the world bread wheat (Triticum aestivum L.) yield is highlylimited due to late season heat stress, mostly occurring during the reproductive phase. Hence thecurrent study was conducted to evaluate the effect of late season heat stress on grain yield andyield components of 20 spring bread wheat cultivars. For this purpose, a stripe block experimentincluding four sowing dates (6th of November, 6th of December, 5th of January and 4th ofFebruary) as vertical plots and 20 cultivars in horizontal plots was implemented with threereplicates in North-East of Ahwaz, Khuzestan, Iran during 2007-2008 and 2008-2009 growingseasons. The results indicated that the main effect of year, sowing date, cultivar and interactionbetween sowing date and cultivar were significant for all studied traits. However, no significantinteraction was found between year and other factors. Comparison of means showed that grainyield in the second year was higher than the first year. The maximum and minimum values(6.048 ton ha-1 and 1.754 ton ha-1) were obtained when seed sowing was performed on 6th ofNovember and 4th of February, respectively. The maximum grain yield (5.019 ton ha-1) wasrelated to Atila cultivar whereas the minimum yield (3.662 ton ha-1) was obtained from Inia 66cultivar. In general, the maximum and minimum grain yields were produced by Atila cultivarsown on 6th of December and Seri82 and Roshan sown on 4th of February, respectively. Theresults suggest that Arvand, Vee/Nac, Atila and Baiat cultivars as heat tolerant cultivars andRoshan, Hamoon, Seri82, Star, Inia66 and Darab2 as susceptible cultivars may be used in heattolerance studies.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

effect of terminal heat stress on yield and yield components of spring bread wheat in ahwaz

terminal heat stress in mediterranean climates like ahwaz is reduced wheat yield. in order to study effect of terminal heat stress on yield and yield components of 20 spring bread wheat cultivars, an experiment was conducted in ramin university of agricultural and natural resources, ahwaz in 2007-2008. the experimental design was stripe block design in randomized complete block design with thre...

متن کامل

Assessment of Terminal Heat Stress and Nitrogen on Grain Yield and Yield Com-ponents of Canola.

In order to study the effects of terminal heat stress and nitrogen on morphophysiological characteristics, ANUE (Agronomical Nitrogen Use Efficiency) and yield of canola, an experiment was conducted at research farm of Ramin Agricultural Sciences and Natural Resources university. The experiment was arranged in split plots based on randomized complete block design with four replications. Main pl...

متن کامل

effect of seed priming and irrigation regimes on yield,yield components and quality of safflowers cultivars

این مطالعه در سال 1386-87 در آزمایشگاه و مزرعه پژوهشی دانشگاه صنعتی اصفهان به منظور تعیین مناسب ترین تیمار بذری و ارزیابی اثر پرایمینگ بر روی سه رقم گلرنگ تحت سه رژیم آبیاری انجام گرفت. برخی از مطالعات اثرات سودمند پرایمینگ بذر را بر روی گیاهان مختلف بررسی کرده اند اما در حال حاضر اطلاعات کمی در مورد خصوصیات مربوط به جوانه زنی، مراحل نموی، عملکرد و خصوصیات کمی و کیفی بذور تیمار شده ژنوتیپ های م...

the impact of attending efl classes on the level of depression of iranian female learners and their attributional complexity

می توان گفت واقعیت چند لایه ا ی کلاس های زبان انگلیسی بسیار حائز اهمیت است، زیرا عواطف و بینش های زبان آموزان تحت تاثیر قرار می گیرد. در پژوهش پیش رو، گفته می شود که دبیران با در پیش گرفتن رویکرد فرا-انسانگرایی ، قادرند در زندگی دانش آموزانشان نقش مهمی را ایفا سازند. بر اساس گفته ی ویلیامز و بردن (2000)، برای کرل راجرز، یکی از بنیان گذاران رویکرد انسانگرایی ، یادگیری بر مبنای تجربه، نوعی از یاد...

Effect of zinc sulfate application on grain yield of bread wheat (Triticum aestivum L.) cv. Chamran under terminal heat stress conditions in Ahvaz

To study the effect of zinc sulfate rates on response of bread wheat cv. Cahmran to terminal heat stress conditions in Ahvaz, Iran, this experiment was conducted at the research farm of Agricultural and Natural Resources Sciences University of Khuzestan, Iran in two cropping cycles (2015-2016 and 2016-2017). The experimental design was split plot arrangements in randomized complete block design...

متن کامل

Impact of wheat-Leymus racemosus added chromosomes on wheat adaptation and tolerance to heat stress

Adaptation of wheat (Triticum aestivum L.) to high temperatures could be improved by introducing alien genes from wild relatives. We evaluated the responses of wheat-Leymus racemosus chromosome introgression lines to high temperature to determine their potentiality for developing improved wheat cultivars. Introgression lines and their parent Chinese Spring were evaluated in a growth chamber at ...

متن کامل

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ذخیره در منابع من قبلا به منابع من ذحیره شده

{@ msg_add @}


عنوان ژورنال

دوره 11  شماره 4

صفحات  549- 560

تاریخ انتشار 2017-09-01

با دنبال کردن یک ژورنال هنگامی که شماره جدید این ژورنال منتشر می شود به شما از طریق ایمیل اطلاع داده می شود.

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023