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Siembra

versão On-line ISSN 2477-8850

Siembra vol.9  supl.3 Quito Out. 2022

 

Sesión 3: Mejoramiento Genético

Domestication and genetic improvement of the Lima bean and the response of the rhizosphere microbiome, studies in Brazil

Domesticación y mejoramiento genético del frijol lima y la respuesta del microbioma de la rizósfera, estudios en Brasil

Ademir Sergio Ferreira Araujo1  *ademir@ufpi.edu.br
http://orcid.org/0000-0002-3212-3852

Angela Celis de Almeida Lopes2 
http://orcid.org/0000-0002-9546-5403

1Federal University of Piauí, Agricultural Science Center. Teresina, Brazil

2Federal University of Piauí, Agricultural Science Center. Teresina, Brazil


Keywords Microbial ecology; domestication syndrome; 16S rRNA gene; plant-microbe interaction

Plants modulate the soil microbiota and select a specific microbial community in the rhizosphere. However, plant domestication and breeding reduce genetic diversity, and it can bring impact on the associated microbiome assembly. Indeed, studies about the microbial communities in the rhizosphere of genus Phaseolus vulgaris have shown the influence of domestication on microbial groups in the rhizosphere, such as decreased Bacteroidetes and increased Proteobacteria. Regarding to Lima bean (Phaseolus lunatus), its domestication has promoted a “founder effect” that significantly reduces the genetic diversity in domesticated genotypes. It has brought changes in the microbiome of rhizosphere in genotypes of Lima bean. Our first study assessing the microbiome of rhizosphere from domesticated genotypes has shown different genotypes recruiting distinct microbial groups in the rhizosphere. Recently, our study assessed the microbiome of rhizosphere in wild, semi-domesticated, and domesticated genotypes of Lima bean and found a significant effect of domestication on microbial community in the rhizosphere. Firstly, the similarity of microbial community decreased from domesticated to wild genotypes. Second, specific microbial groups were found in rhizosphere in wild, semi-domesticated, and domesticated genotypes. Third and more interestingly, the complexity of microbial connections decreased from wild to domesticated genotypes. Altogether, it shows that the process of domestication significantly changes the structure and composition of microbial communities and reduces their complexity of connections in the rhizosphere of Lima bean. These shifts on microbial communities in the rhizosphere of genotypes during plant domestication could influence the performance of plants and their responses to biotic and abiotic factors.

*

Nacionalidad Brasileña. Es ingeniero agrónomo con doctorado en Microbiología de Suelos de la Universidad de São Paulo y posdoctorado en Ecología Microbiana de la Universidad de California, Davis, EE.UU. Actualmente es profesor asociado de la Universidad Federal de Piauí (Teresina-Brasil), trabajando a nivel de pregrado y posgrado. Tiene experiencia en Microbiología de Suelos, Ecología Microbiana de Suelos, fijación de N y biomasa microbiana. Tiene más de 180 artículos publicados en revistas indexadas con JCR. Ha publicado varios libros y capítulos, entre ellos el libro “Phaseolus lunatus: diversidad, crecimiento y producción” publicado en EE.UU. En el tema de su ponencia, viene desarrollando investigaciones con microbioma rizosférico en la domesticación y mejoramiento de frijol Lima, con alianzas nacionales e internacionales.

Creative Commons License Esta obra está bajo una Licencia Creative Commons Atribución-NoComercial 4.0 Internacional.