Evaluation of indirect selection in yield improvement of triticale genotypes under drought stress conditions

Article Type:
Research/Original Article (دارای رتبه معتبر)
The general goal of this study is to investigate suitable triticale lines under normal conditions and drought stress using important grain yield and its components. Also, the technique of evaluating the Smith-Hazel coefficient for considering the yield components as indirect selection index, which has not been used practically in plant breeding sciences up to now, has been discussed and proposed. Accordingly, it would be possible to utilize the contribution of yield components in grain yield apply them to screen superior lines in the form of one single index. In this research two separate field experiments, normal irrigation and drought stress conditions, were conducted in three cropping years from 2016 to 2018 with 56 genotypes and two cultivars of triticale. Smith-Hazel selection index applied based on yield-related traits in such a way that the traits with a higher positive effect on grain yield were being utilized for screening aims. high heritability of yield and its component showed the possibility of using them as selection criteria to screen elite genotypes. For indirect selection the path analysis was carried out and calculated coefficient of the traits with higher impacts on yield containing number of days to flowering straw yield with negative impacts alongside flag leaf length and biomass yield with positive impacts in normal condition were used as economic coefficients. In stressful condition, spike weight and seeds and spikelet numbers per spike had a positive and significant effect on the selection index.
Journal of Plant Ecophysiology, Volume:14 Issue: 50, 2023
73 to 86
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یک‌ساله به مبلغ 1,390,000ريال می‌توانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
  • حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران می‌شود.
  • پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانه‌های چاپی و دیجیتال را به کاربر نمی‌دهد.
In order to view content subscription is required

Personal subscription
Subscribe magiran.com for 70 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!