Transference of multiple resistance to peanut through the development of cross-compatible complex hybrids of wild Arachis

Genetics and Molecular Biology
Alessandra Pereira FáveroM D Michelotto

Abstract

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...Continue Reading

References

Feb 24, 2009·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·G RobledoG Seijo
Jun 12, 2013·Cytogenetic and Genome Research·A Madlung, J F Wendel
Jun 20, 2015·PloS One·Marcos Doniseti MichelottoAlessandra Pereira Fávero
May 5, 2017·PloS One·Marcos Doniseti MichelottoAlessandra Pereira Fávero

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Methods Mentioned

BETA
electrophoresis
Fluorescence
four hybrids

Software Mentioned

Image Tool
PowerMarker
NTSYS

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