Data/hora: 23/06/2024 04:24:58

Biblioteca(s): | Embrapa Pecuária Sudeste.
Data corrente: | 18/11/2020
Data da última atualização: | 23/11/2020
Autoria: | FAVERO, A. P.; CUSTODIO, A. R.; DINATO, N. B.; GODOY, I. J. de; SEIJO, J. G.; MICHELOTTO, M. D.
Afiliação: | ALESSANDRA PEREIRA FAVERO, CPPSE; ADRIANA REGINA CUSTODIO, Bolsista da Embrapa Recursos Genéticos e Biotecnologia; Naiana Barbosa Dinato, UFSCAR; Ignácio José de Godoy, INSTITUTO AGRONÔMICO; José Guillermo Seijo, Universidad Nacional del Nordeste, Argentina; Marcos Doniseti Michelotto, Agência Paulista de Tecnologia dos Agronegócios.
Título: | Transference of multiple resistance to peanut through the development of cross-compatible complex hybrids of wild Arachis.
Ano de publicação: | 2020
Fonte/Imprenta: | Genetics and Molecular Biology, v. 43, n. 2, jun. 2020, e20190099.
ISSN: | 1678-4685
DOI: | https://doi.org/10.1590/1678-4685-GMB-2019-0099
Idioma: | Inglês
Conteúdo: | Peanut (Arachis hypogaea L.) is a tetraploid species with an A and B genome, while the majority of wild Arachis species are diploid with distinct genomes. In pre-breeding programs, one way to introgress interesting wild genes into peanut is by producing amphidiploids. This study aimed at the hybridization between distinct amphidiploids and their characterization, to combine high crossability with peanut, observed in some amphidiploids, with high pest and disease resistances observed in others. These new hybrids were called complex hybrids. Four amphidiploids previously obtained were crossed at four different combinations, and the derived complex hybrids were crossed with four peanut cultivars. Morphological, reproductive, chromosome complement, molecular markers for hybrid identification, phytopatological, and entomological characterizations were performed on the complex hybrids. All cross combinations resulted in complex hybrids. One complete complement of each diploid progenitor was confirmed in each hybrid. Plants of six distinct hybrid combinations were obtained between the complex hybrids and peanut. Based on morphological characterization, differences among progenies from distinct cross combinations were observed. Complex hybrids were considered more resistant to all diseases and pests than peanut cultivars. The simultaneous introgression of genes from four wild Arachis species into peanut was possible through the development of complex hybrids.
Palavras-Chave: | Amphidiploids; Groundnut; Wild species.
Thesagro: | Arachis Hypogaea.
Thesaurus Nal: | Genetic resources.
Categoria do assunto: | G Melhoramento Genético
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/217963/1/TransferenceMultipleResistance.pdf
Registro original: | Embrapa Pecuária Sudeste (CPPSE)
Exemplares: | CPPSE - (25163-1) - UPC - AP - DD - PROCI-2020.00077 - FAV - 2020.00128 - DIS