Abstract

Seeds of 17 common bean cultivars were characterized for resistance to infestation by Zabrotes subfasciatus and Acanthoscelides obtectus under no-choice and free-choice conditions. To determine the relationship of some physical and chemical characteristics of the seeds and resistance to bean weevils, seed hardness, seed coat thickness, tannins, lectins, trypsin inhibitors and protein content were evaluated in the 17 cultivars. Three of the cultivars were resistant to Z. subfasciatus, but none were resistant to A. obtectus. A correlation was found between lectin content and both oviposition (r = − 0.38, P < 0.05) and adult emergence (r = − 0.33, P < 0.01) in a no-choice experiment with Z. subfasciatus, confirming the importance of lectins for resistance against bean weevil. No correlations were found with seed hardness, seed coat thickness, tannins, trypsin inhibitors or protein content. The cultivars resistant to Z. subfasciatus were: Bayocel-1, Flor de Mayo Bajío and Bayo Victoria. Cultivar Bayocel 1 showed intermediate values of seed hardness and lectin content and high levels of seed coat thickness, tannins and trypsin inhibitors while Flor de Mayo Bajío showed the highest lectin content of all cultivars as well as high levels of seed coat thickness, tannin content and trypsin inhibitors. Bayo Victoria showed high levels of lectins and low levels of trypsin inhibitors.

Full Text
Paper version not known

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.