Document Type : Research Paper

Authors

• Somayeh Dadashi ¹
• Abdolhadi Hossein Zadeh ¹
• Naser Mohammadi ²
• Mohamad Reza Bihamta ¹
• Mohamad Reza Naghavi ¹

¹ Tehran University

² Dryland Agricultural Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Maragheh, Iran

Abstract

Introduction: Yellow rust (Puccinia striformis sp. tritici) is known as one of the most destructive diseases of wheat in worldwide as well as Iran and caused a significant reduction in the grain yield. In this regard, host resistance is calculated as the most management strategies for this disease. Moreover, the identification of resistance sources at the seedling and adult stages of plant growth and development is a necessary task to achieve durable resistance. Hence, the main objective of the present study was to investigation of resistance of a set of promising bread wheat genotypes under controlled greenhouse and filed conditions.
 
Methodology: The plant genetic materials undertaken in this research included 71 promising bread wheat genotypes along with five local varieties as control genotypes. The greenhouse test was done using several isolates taking part from Zarghan, Mashhad, and Karaj regions. The field experiments were performed using the identified yellow rust race at the two locations including Zarghan and Aedabil during two cropping seasons (2020-2022). Several parameters such as infection type (IT), coefficient of infection (CI), and area under the disease progress curve (AUDPC) were calculated for determine the resistance rate of tested genotypes.
 
Research findings: Based on results, 33, 46, 49, and 53% of the total tested genotypes showed resistant against 6E134A+, Yr27, 6E142A+, Yr27, 46E190A+, Yr27, and 6E130A+, Yr27 isolates at the seedling stage, respectively. At the adult plant stage, 24 genotypes showed the resistance reaction (R and R/MR) against yellow rust disease in thee Ardabil region across two years. In the Zarghan region, 26 and 18 genotypes showed the resistance reaction in the first and second year, respectively. According to CI parameter, 33 and 32 genotypes were placed into the resistant group across two years. Moreover, the results of cluster analysis showed that all genotypes were grouped into separate clusters, and the resistant genotypes in Ardabil and Zarghan were recognized from other genotypes. In general, our findings indicated that genotypes numbers 12, 17, 21, 24, 25, 27, 28, 37, and 74 showed a relative resistance against all yellow rust isolates at the both seedling and adult plant stages.

Keywords

• Wheat
• yellow rust
• area under the disease progress curve
• coefficient infection

Main Subjects

• plant breeding