Assessment of Orobanche tolerance and yield in six new promising lines of faba bean

Abstract: The present investigation was conducted under Orobanche free and naturally infected soil during 2013/14 and 2014/15 seasons at Mallawy Agricultural Research Farm, El-Minia, Egypt, in a Randomized Complete Blocks Design (RCBD) with three replicates, to evaluate the tolerantce levels of six faba bean lines as compared with Giza 2 (Orobanche-susceptible) and Giza 843 (Orobanche-tolerant) cultivars. All tested lines were significantly less infected with Orobanche (number and dry weight spikes/ m2) than both checks. Therefore, the tested lines could be considered Orobanche-tolerant. Consequently, lines 1 and 3 were the most promising lines for resistance to Orobanche with high yielding ability (7.88 and 6.40 ardab/faddan, respectively) and (8.14 and 7.87 ardab/faddan, respectively) in 1st and 2nd seasons, respectively. Highly significant differences were detected for infection type of Orobanche, suggesting that these lines differed in genes controlling the resistance to Orobanche. Second season had higher heritability than first season for all traits, except number of pods per plant, indicating that heritability in the second season was less influenced by the environment. In both seasons; high heritability was coupled with higher genetic advance% for no. of seeds/plant (81.00%, 54.58% and 95.80, 67.66%), and for seed yield/plant (85.00, 63.35% and 89.00, 65.22%), respectively, suggesting the involvement of epistatic interactions. Therefore, additive gene action was increased with advanced generation, and was more pronounced in the inheritance of Orobanche-resistance and yield components in both generations, confirming the potential value in reducing the losses to yield under infection condition. Tested lines, especially line 1 and line 3 can be promoted as new varieties or used in breeding programs to develop new resistant lines.
Publication year 2016
Pages 821-833
Organization Name
Author(s) from ARC
Publication Type Journal
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