| Autor: |
Fávero AP; Embrapa Pecuária Sudeste, São Carlos, SP, Brazil., Custodio AR; Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF, Brazil., Dinato NB; Universidade Federal de São Carlos, São Carlos, SP, Brazil., Godoy IJ; Instituto Agronómico, Campinas, SP, Brazil., Seijo JG; Universidad Nacional del Nordeste, Instituto de Botánica del Nordeste, Facultad de Ciencias Exactas y Naturales y Agrimensura, Corrientes, Argentina., Michelotto MD; Agência Paulista de Tecnologia dos Agronegócios, Polo Centro Norte, Pindorama, SP, Brazil. |
| Jazyk: |
angličtina |
| Zdroj: |
Genetics and molecular biology [Genet Mol Biol] 2020 Jun 08; Vol. 43 (2), pp. e20190099. Date of Electronic Publication: 2020 Jun 08 (Print Publication: 2020). |
| DOI: |
10.1590/1678-4685-gmb-2019-0099 |
| Abstrakt: |
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. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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