Arthropod-Plant Interactions (2020) 14, 641-651

José Cruz Jiménez-Galindo, María Tortosa, Pablo Velasco, María De La Fuente, Bernardo Ordás and Rosa Ana Malvar (2020)
Inheritance and metabolomics of the resistance of two F₂ populations of Phaseolus spp. to Acanthoscelides obtectus
Arthropod-Plant Interactions 14 (5), 641-651
Abstract: The bean weevil Acanthoscelides obtectus is one of the major storage pests of dry bean. Tepary bean (Phaseolus acutifolius) is a great source of resistance against A. obtectus to improve dry bean production. We developed two F₂ populations of Phaseolus spp. by crossing bean genotypes resistant to A. obtectus × susceptible, to (1) search for metabolites related to bean weevil resistance using an untargeted metabolomics approach and (2) understand the genetics of resistance to A. obtectus attack using the number of adults emerged from seeds as resistance criteria. The segregation of the number of adults emerged from seeds showed that the genetics of resistance (0 emerged adults = resistant, 1 or more emerged adults = susceptible) was controlled by a single dominant gene in two (resistant × susceptible) F₂ populations. From nine metabolites detected, pipecolic acid concentration was significantly higher in the testa of resistant individuals than in the testa of susceptible individuals. From a breeding point of view, (P. Saltillo × T. amarillo) F₂ is of special interest because it is derived from a cultivated tepary × cultivated common bean cross and showed 3:1 resistant vs susceptible segregation. Therefore, this F₂ is a suitable base material for breeding programmes to obtain new bean lines with good agronomic performance, seed quality and resistance to insect attack. Pipecolic acid plays a role in resistance against A. obtectus.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Rosa A. Malvar

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.
	Acanthoscelides obtectus	Stored legumes
	Acanthoscelides obtectus	Beans (Phaseolus)