نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه به نژادی و بیوتکنولوژی گیاهی، دانشکده کشاورزی، دانشگاه تبریز.
2 دانشکده کشاورزی- دانشگاه تبریز
3 گروه به نژادی و بیوتکنولوژی گیاهی، دانشکده کشاورزی، دانشگاه تبریز
4 موسسه تحقیقات اصلاح و تهیه نهال و بذر، بخش تحقیقات دانه‌های روغنی
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Background and Objectives: The study was conducted to evaluate different maize hybrids under water deficit stress conditions in terms of agronomic traits and grain yield and to identify hybrids tolerant to water deficit stress.
Materials and Methods: The study was carried out in the research fields of the University of Tabriz's Faculty of Agriculture using a split plot experiment, based on a randomized complete block design with three replications. The main plots included two different irrigation conditions (normal and water deficit stress) and the sub-plots included 16 different maize hybrids. Stress was applied at the flowering stage.
Results: Based on the results, SC703 and SC700 hybrids were recognized as superior hybrids in terms of most agronomic traits and grain yield in all conditions, and in contrast, AR66, SC702 and SC500 hybrids were recognized as water deficit stress-sensitive hybrids with low yield. Cluster analysis also separated the maize hybrids into two separate groups. The SC703 and SC700 hybrids were identified as superior hybrids in terms of the majority of agronomic traits and grain yield under all conditions. Additionally, cluster analysis divided the hybrid maize into two groups. The first group comprised hybrids SC703, SC260, K3647×K18, and SC700, which were introduced as tolerant hybrids and were superior to the average of all traits. The second group consisted of hybrids SC704, KSC705, SC706, SC702, SC670, SC647, SC604, DC370, SC500, SC400, K18, K166×, and AR66, which were less valuable in terms of most traits.
Conclusion: The imposed water deficit stress during the flowering stage significantly reduces all agronomic traits, particularly grain yield. The assessed maize hybrids differ significantly in their ability to withstand water deficit stress. While SC702 and AR66, SC500 hybrids demonstrated the lowest grain yield under average of irrigation condition, SC703 and SC700 hybrids had the highest grain yield under both normal irrigation and water deficit stress condition. Thus, it is advised to plant SC703 and SC700 hybrids in regions that are under stress from water deficit.
کلیدواژه‌ها [English]
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