Selection of biofortified mini lettuce progenies resistant to Pectobacterium carotovorum subsp. carotovorum

Brazilian consumers are increasingly seeking unique vegetable products, such as mini lettuces. However, their production is hampered by a wide variety of pathogens, including Pectobacterium carotovorum subsp. carotovorum, which causes soft rot in lettuce. In this study, we aimed to select biofortifi...

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Bibliographic Details
Published in:Acta scientiarum. Agronomy 2023-01, Vol.45 (1), p.1
Main Authors: Jacinto, Ana Carolina Pires, Castoldi, Renata, da Silva, Isadora Goncalves, Mota, Diesiele Caroline Silveira, Moreira, Leticia Goncalves, Tebaldi, Nilvanira Donizete, de Oliveira Charlo, Hamilton Cesar, Maciel, Gabriel Mascarenhas
Format: Article
Language:eng ; por
Subjects:
AGRONOMY
Disease resistance
Genotypes
Inoculation
Lactuca sativa
soft rot
carotenoids
plant pathogenic bacteria
Lettuce
Lettuces
Mathematical analysis
Pectobacterium carotovorum
Soft rot
Stems
Vegetables
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Summary:Brazilian consumers are increasingly seeking unique vegetable products, such as mini lettuces. However, their production is hampered by a wide variety of pathogens, including Pectobacterium carotovorum subsp. carotovorum, which causes soft rot in lettuce. In this study, we aimed to select biofortified mini lettuce genotypes with good agronomic traits and resistance to P. carotovorum. A randomized block design consisting of 12 treatments, conducted in a field and greenhouse (Federal University of Uberlândia [UFU]), was used to select biofortified mini lettuce with good agronomic traits: SPAD index, stem and plant diameter, stem length, plant height, number of leaves, fresh weight, and bolt resistance. A completely randomized design consisting of 13 treatments was used for resistance or susceptibility testing. The bacterial suspension was inoculated and the following were assessed: disease severity, 16 days after inoculation; area under the disease progress curve, calculated separately at 4, 8, 12, and 16 days after inoculation as well as the sum of data calculated on all the assessment days; and the disease resistance class. The genotypes UFU 215#1 and UFU 215#2 had significantly high carotenoid concentrations. The genotypes UFU 66#4, UFU 215#1, and UFU 215#7 showed high bolt resistance. All genotypes were classified as resistant or moderately resistant to the P. carotovorum isolate, UFU A7.
ISSN:1679-9275
1807-8621
1807-8621
DOI:10.4025/actasciagron.v45i1.56843