Genetic variation of agronomic traits in a global collection of oats (Avena sp.)

Document Type : Research Paper

Authors

1 Department of Plant Genetics and Production, Campus of Agriculture and Natural Resources, Razi University, Kermanshah, Iran

2 Department of Plant Genetics and Production, Campus of Agriculture and Natural Resources, Razi University, Kermanshah, Iran; Cereal Research Centre, Razi University, Kermanshah, Iran

Abstract

This study aimed to evaluate the variation in agronomic traits of 361 cultivated oat genotypes and to identify superior genotypes for oat breeding programs. The experiment was conducted as a simple square lattice design with two replications for two growing seasons (2018-2019 and 2019-2020) in Kermanshah, Iran. There was a significant difference among oat genotypes. The highest grain yield (GY) was obtained in the “OX87:080-2” and “LA Prevision” genotypes. Furthermore, genotypes “Rubida” and “VDO-931-1” were superior regarding the biomass. Several analyses were performed using the best linear unbiased prediction estimates. The correlation coefficients showed a significant positive relationship between GY and biomass, 1000-kernel weight (TKW), and the number of panicles per plot. Biomass was positively and significantly correlated with all studied traits, except TKW. The number of grains per panicle (NGPP) and TKW had the highest positive direct effects on the GY and NPPP imposed the highest positive indirect effect through TKW. While the highest negative indirect effect was exerted by the NGPP through the TKW. The results of pseudo-F for cluster analysis grouped genotypes in five separate groups. The fifth group had the highest values ​​for GY, biomass, TKW, and NPPP. So, these genotypes could be considered as qualified parents to produce superior lines in breeding programs. 

Keywords

Main Subjects

Article Title [Persian]

تنوع ژنتیکی صفات زراعی در مجموعه جهانی ژنوتیپ های یولاف (.Avena sp)

Authors [Persian]

  • بفرین مولایی 1
  • صحبت بهرامی نژاد 2
  • لیلا زارعی 2
1 گروه مهندسی تولید و ژنتیک گیاهی، پردیس کشاورزی و منابع طبیعی، دانشگاه رازی، کرمانشاه
2 گروه مهندسی تولید و ژنتیک گیاهی، پردیس کشاورزی و منابع طبیعی، دانشگاه رازی، کرمانشاه؛مرکز تحقیقات غلات، دانشگاه رازی، کرمانشاه
Abstract [Persian]

هدف از این مطالعه ارزیابی تنوع ژنتیکی 361 ژنوتیپ یولاف بر اساس صفات زراعی به منظور شناسایی ژنوتیپ‌های برتر برای برنامه‌های آتی اصلاحی بود. آزمایش در قالب طرح لاتیس مربع ساده با دو تکرار و در دو سال زراعی 1397-1398 و 1398-1399 در کرمانشاه اجرا شد. بر اساس نتایج به دست آمده، ژنوتیپ‌های   “OX87: 080-2”  و “LA Prevision” به ترتیب بیشترین عملکرد دانه را داشتند. ژنوتیپ‌های “Rubida” و “VDO-931.1” برترین ژنوتیپ‌ها از نظر زیست توده بودند. در این تحقیق تعدادی تجزیه­ روی داده ­های BLUP برآورد شده، انجام شد. با توجه به ضرایب همبستگی حاصل، عملکرد دانه با صفات زیست توده، وزن هزار دانه و تعداد پانیکول در کرت آزمایشی همبستگی مثبت و معنی دار نشان داد. زیست توده نیز با تمام صفات مورد بررسی به جز وزن هزار دانه همبستگی مثبت و معنی داری داشت. صفات وزن هزار دانه و تعداد دانه در پانیکول بیشترین اثر مستقیم و مثبت را روی عملکرد دانه داشتند و بیشترین اثر غیر مستقیم مثبت را صفت تعداد پانیکول در کرت آزمایشی از طریق وزن هزار دانه بر عملکرد دانه اعمال کرد. در حالی که بیش‌ترین اثر غیرمستقیم منفی روی عملکرد دانه را صفت تعداد دانه در پانیکول از طریق وزن هزار دانه اعمال کرد. بر اساس مقدار F کاذب، ژنوتیپ‌ها پس از انجام تجزیه خوشه‌ای در پنج گروه مجزا قرار گرفتند. گروه پنجم برای عملکرد دانه، بیوماس، وزن هزار دانه و تعداد پانیکول در کرت آزمایشی بالاترین مقادیر را به خود اختصاص داد. از این رو، می‌توان ژنوتیپ‌های این گروه را به عنوان والدین برای تولید لاین­ های برتر در برنامه‌های آتی اصلاحی پیشنهاد کرد.

Keywords [Persian]

  • تجزیه‌های چند متغیره
  • تنوع ژنتیکی
  • صفات زراعی
  • یولاف
  • BLUPs

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Journal of Plant Physiology and Breeding
Volume 13, Issue 2
December 2023
Pages 145-159

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