hana aboodeh; abdelmehdi bakhshandeh; Mohammad Moradi Telavat; seyed ata Siadat; SeyedAmir Moosavi
Abstract
In order to determine drought stress in the final stages of flowering up to 50% pods and pods until harvest tolerance in canola genotypes via yield-base stress tolerance indices, a split plot experiment has been conducted based on the randomized complete block design with three replications at the research ...
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In order to determine drought stress in the final stages of flowering up to 50% pods and pods until harvest tolerance in canola genotypes via yield-base stress tolerance indices, a split plot experiment has been conducted based on the randomized complete block design with three replications at the research farm of department of plant production and genetics, Agricultural Sciences and Natural Resources University of Khuzestan, Iran during 2020-2021. The main plots include three irrigation treatments: the control (without any interruption of irrigation), interruption of irrigation in the beginning of flowering stage (phenology code 60) to the formation of 50% pods (phenology code 75), and interruption of irrigation in the stage of formation of pods until harvest (Phenology code 99) in the main plots. Also, the genotypes (Long pod, Aram, RGS 003, Jankom, Solar, Hayola 4815, Mahtab, Julius, Agamax, and Sala) are arranged in sub-plots with respect to irrigation treatments. They are reliable indices to identify drought tolerant rapeseed cultivars. Indices MP, GMP, and STI are the most suitable ones to evaluate drought stress tolerance in different treatments. The highest grain yield of control treatment belongs to Hayola 4815, Long pod, Solar genotypes (2093.8, 1791 and 1700 kg / ha), and the lowest to Jankum genotype (832.1 kg / ha), in flowering Stress up to 50% pods. The highest grain yield is observed in Hayola 4815 (1563.9 kg / ha) and Lon gpod (1150.9 kg / ha) and the lowest grain yield in Jankum and Mahtab genotype (540, 935.5 kg / ha).
leila Mottaghi; Iraj Allahdadi; Amir Hossein Shirani-rad; Gholam Abbas Akbari; Tahereh Hasanloo
Abstract
This study was conducted to analyze the effect of zeolite application on yield and yield components of rapeseed under drought conditions as a factorial-split on the based of randomized complete block design with four replications in 2011-12 in the research field of Seed and Plant Improvement Institute, ...
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This study was conducted to analyze the effect of zeolite application on yield and yield components of rapeseed under drought conditions as a factorial-split on the based of randomized complete block design with four replications in 2011-12 in the research field of Seed and Plant Improvement Institute, Karaj. The effects of zeolite levels Z0 (0) and Z10 (10 t/ha) under three drought stress levels, control (irrigation after 40%), moderate stress (irrigation after 60%) and severe stress (irrigation after 80% soil water depletion) were in main plots and four genotypes of Brassica napus (‘KR4’, ‘Eldo’ lines and ‘GKH305’, ‘Anatol’ cultivars) were in subplots. Based on the results, negative impact of drought on yield components led to a significant fall in grain and oil yield. The most negative impact of drought stress was seen in the grain number per silique. Between genotypes, ‘GKH305’ in none stress condition and ‘Anatol’ in both mild and severe stress conditions had the highest yield. According to the results, zeolite can be used in growth period or part time of drought stress.