Document Type : Research Paper
Authors
1 Sararood Branch, Dryland Agricultural Research Institute, AREEO, Kermanshah, Iran.
2 Dryland Agricultural Research Institute (Sararood Branch)
3 Dryland Agricultural Research Institute
Abstract
Introduction: Chickpea is one of the most important crop for rainfed condition, which plays an important role in the agriculture sustainability. Chickpea generally is known as a sensitive crop to many herbicides and has a poor ability to compete with weeds in the early growth stage because of its slow growth rate and low leaf area at the early stages of crop growth; therefore, weeds become a serious problem in autumn sowing conditions. Development of herbicide-tolerant varieties could be considered as a suitable way to cope with weeds. Identification of herbicide-tolerant genetic resources is necessary for use in breeding herbicide tolerant varieties. The aim of this study was to investigate the genetic diversity of Kabuli chickpea varieties and advanced breeding lines in response to the post-emergence application metribuzin and imazatapir herbicides.
Methodology: In this research, the genetic diversity of 150 Kabuli chickpea genotypes was studied for tolerance to the post-emergence application of Metribuzin and Imazethapyr herbicides. For this purpose, 50 and 150 genotypes was evaluated in the experimental filed of Dryland Agricultural Research Institute (Sararood Branch) during 2019-20 and 2020-21 cropping seasons, respectively. Three separate trials (control, spraying with Metribuzin, spraying with Imaztapyr) were conducted using an alpha-lattice design with two replications in each cropping seasons.
Research findings: According to the results of this research, genotypes showed significant variation for tolerance to the mentioned herbicides. The genotypes were more sensitive to Metribuzin than to Imazethapyr. Metribuzin and Imazatapir reduced the grain yield by 27% and 15%, respectively. Among the studied cultivars, Adel, Goksu, Aksu and Arman were more tolerant to the Imazethapyr in comparison with other cultivars. The superior genotypes identified in this study could be used in breeding programs for development of herbicide-resistant cultivars.
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