Plant Breeding (2021) 140, 464-476

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Jalal Shaabani, Abdolhadi Hossainzadeh, Hassan Zeinali and Mohammad Reza Naghavi (2021)
A field study on common bean (Phaseolus vulgaris) response to Tetranychus urticae herbivory
Plant Breeding 140 (3), 464-476
Abstract: The bean farms in Iran are increasingly suffering from two-spotted spider mite (TSSM) herbivory, which is intensified with the gradual increase in temperature and decrease in relative humidity coinciding with the flowering time in the common bean. Limited genetic variability for resistance to TSSM is a major bottleneck in the development of resistant common beans. Hence, this study aimed to evaluate the response of a diverse panel of 104 common bean genotypes to TSSM infestation during reproductive stages. The experiment was conducted in the form of an augmented randomized complete block design under TSSM-infested and non-infested conditions. The less susceptible genotypes had more grain yield, number of pods, plant height and leaf chlorophyll content, but also, they showed less reduction in these traits under TSSM herbivory condition relative to the more susceptible genotypes. The spider mite laid more eggs on the leaves of more susceptible beans creating a negative density dependence condition, while there was a greater nutritional contribution per adult mite on the leaves of less susceptible common beans. Variance components estimation highlighted grain yield, number of pods, plant height and 1,000-grain weight of the common bean with the higher genotypic variances compared to environmental variances. The findings provide a phenotypic screening procedure of common bean to determine the main plant traits contributing to genetic TSSM resistance under field conditions. This study concludes that pole-type genotypes of common bean would tolerate the mite feeding more than bush-type genotypes during reproductive stages.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
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Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Tetranychus urticae Beans (Phaseolus) Iran