Introgression of leaf spots resistance genes in peanut lines using molecular markers

Authors

  • Taís de Moraes Falleiro Suassuna Programa de Melhoramento do Amendoim – Embrapa, Santo Antônio de Goiás, GO. https://orcid.org/0000-0002-6360-5168
  • Adriana Regina Custódio Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF.
  • Jair Heuert Programa de Melhoramento do Amendoim-– Embrapa, Santo Antônio de Goiás, GO. https://orcid.org/0000-0002-2064-4263
  • Nelson Dias Suassuna Embrapa Algodão, Santo Antônio de Goiás, GO.
  • Márcio de Carvalho Moretzsohn Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF. https://orcid.org/0000-0003-1708-1508
  • Maxuel Fellipe Nunes Xavier IFMT Campus São Vicente – Centro de Referência de Campo Verde, Campo Verde, MT. https://orcid.org/0000-0003-0822-4992

DOI:

https://doi.org/10.52755/sas.v2iedesp1.149

Keywords:

Arachis hypogaea L., resistência a doenças, pré-melhoramento, A. cardenasii.

Abstract

Leaf spots are among the main foliar disease of peanut crop, leading to an expensive management with fungicides sprays to avoid yield losses. However, some wild species are source of resistance genes, as for example Arachis cardenasii. Here we describe the evaluation of 45 peanut progenies and lines and the selection of six peanut lines related to the wild species Arachis batizocoi, A. magna and A. cardenasii. The cultivars BRS 421 OL and IAC OL3 were used as susceptible checks. We evaluated two experiments: one with 12 genotypes, under complete random block design with three replications; another with 35 genotypes with incomplete block design. No fungicides were sprayed in the experimental area; the severity in the checks was very high. The leaf spots resistance was evaluated with a severity scale (1 to 9) and the data evaluated under incomplete block design-group of experiments using the mixed model (REML/BLUP). The F4 line 2020-3108 was evaluated with complete resistance (rate 1), and other six lines were evaluated with severity values under rate 3. All these lines were selected in interspecific progenies evaluated in 2019-20 for leaf spots resistance, genotyped with molecular markers to detect genes associated with resistance derived from A. cardenasii.  Despite the resistance to leaf spots, all these lines need improvement for agronomic traits, and will be used as donor of leaf spots resistance in crossings with high yielding lines and cultivars, in order to select peanut cultivars with higher levels of resistance to leaf spots. Six pre-breeding strains with high levels of resistance to brown eye spot were identified, originating from the species A. cardenasii, A. magna, and A. batizocoi.

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Author Biographies

Taís de Moraes Falleiro Suassuna, Programa de Melhoramento do Amendoim – Embrapa, Santo Antônio de Goiás, GO.

Programa de Melhoramento do Amendoim – Embrapa, Santo Antônio de Goiás, GO. E-mail: tais.suassuna@embrapa.br.

Adriana Regina Custódio, Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF.

Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF. E-mail: custodiosjs@gmail.com.

Jair Heuert, Programa de Melhoramento do Amendoim-– Embrapa, Santo Antônio de Goiás, GO.

Programa de Melhoramento do Amendoim – Embrapa, Santo Antônio de Goiás, GO. E-mail:  jair.heuert@embrapa.br.

Nelson Dias Suassuna, Embrapa Algodão, Santo Antônio de Goiás, GO.

Núcleo Cerrado – Embrapa Algodão, Santo Antônio de Goiás, GO. E-mail:  nelson.suassuna@embrapa.br.

Márcio de Carvalho Moretzsohn, Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF.

Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF. E-mail:  marcio.moretzsohn@embrapa.br.

Maxuel Fellipe Nunes Xavier, IFMT Campus São Vicente – Centro de Referência de Campo Verde, Campo Verde, MT.

Discente de Agronomia do IFMT Campus São Vicente – Centro de Referência de Campo Verde, Campo Verde, MT. E-mail:  maxuelfellipe90@gmail.com.

Published

2021-10-22

How to Cite

Suassuna, T. de M. F. ., Custódio, A. R. ., Heuert, J., Suassuna, N. D. ., Moretzsohn, M. de C. ., & Xavier, M. F. N. . (2021). Introgression of leaf spots resistance genes in peanut lines using molecular markers . South American Sciences, 2(edesp1), e21149. https://doi.org/10.52755/sas.v2iedesp1.149

Issue

Section

Anais do XVIII Encontro Sobre a Cultura do Amendoim - 2021

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