Una nueva especie trifoliolada de &lt;i&gt;Arachis&lt;/i&gt; (Fabaceae) y comentarios adicionales sobre la sección taxonómica &lt;i&gt;Trierectoides&lt;/i&gt;

Valls, José Francisco Montenegro; Costa, Leila C. Da; Custódio, Adriana Regina

doi:10.30972/bon.2211257

Cited by 35 publications

(7 citation statements)

References 6 publications

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“…The genus Arachis is native to South America. It contains 83 described species, assembled into nine taxonomic sections according to their morphology, geographical distribution, and cross-compatibility relationships ( Krapovickas and Gregory, 1994 ; Valls and Simpson, 2005 ; Valls et al., 2013 ; Valls and Simpson, 2017 ; Seijo et al., 2021 ). Cultivated peanut belongs to section Arachis , which also includes 32 closely related wild species.…”

Section: Introductionmentioning

confidence: 99%

Marker-assisted introgression of wild chromosome segments conferring resistance to fungal foliar diseases into peanut (Arachis hypogaea L.)

et al. 2023

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IntroductionFungal foliar diseases can severely affect the productivity of the peanut crop worldwide. Late leaf spot is the most frequent disease and a major problem of the crop in Brazil and many other tropical countries. Only partial resistance to fungal diseases has been found in cultivated peanut, but high resistances have been described on the secondary gene pool.MethodsTo overcome the known compatibility barriers for the use of wild species in peanut breeding programs, we used an induced allotetraploid (Arachis stenosperma × A. magna)4x, as a donor parent, in a successive backcrossing scheme with the high-yielding Brazilian cultivar IAC OL 4. We used microsatellite markers associated with late leaf spot and rust resistance for foreground selection and high-throughput SNP genotyping for background selection.ResultsWith these tools, we developed agronomically adapted lines with high cultivated genome recovery, high-yield potential, and wild chromosome segments from both A. stenosperma and A. magna conferring high resistance to late leaf spot and rust. These segments include the four previously identified as having QTLs (quantitative trait loci) for resistance to both diseases, which could be confirmed here, and at least four additional QTLs identified by using mapping populations on four generations.DiscussionThe introgression germplasm developed here will extend the useful genetic diversity of the primary gene pool by providing novel wild resistance genes against these two destructive peanut diseases.

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Section: Introductionmentioning

confidence: 99%

Marker-assisted introgression of wild chromosome segments conferring resistance to fungal foliar diseases into peanut (Arachis hypogaea L.)

et al. 2023

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“…These species were assembled into nine sections according to morphology, geographic distribution and cross compatibility (Krapovickas and Gregory 1994, Valls and Simpson 2005, Valls et al 2013, Santana and Valls 2015). Most of species are diploid with x = 10 (2n = 20); a few (4 species) are diploid with x = 9 (2n = 18) and the rest (5 species) are tetraploid with x =10.…”

Section: Introductionmentioning

confidence: 99%

Genomic characterisation of Arachis porphyrocalyx (Valls & C.E. Simpson, 2005) (Leguminosae): multiple origin of Arachis species with x = 9

Silvestri¹,

Ortiz²,

Robledo³

et al. 2017

CCG

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The genus Arachis Linnaeus, 1753 comprises four species with x = 9, three belong to the section Arachis: Arachis praecox (Krapov. W.C. Greg. & Valls, 1994), Arachis palustris (Krapov. W.C. Greg. & Valls, 1994) and Arachis decora (Krapov. W.C. Greg. & Valls, 1994) and only one belongs to the section Erectoides: Arachis porphyrocalyx (Valls & C.E. Simpson, 2005). Recently, the x = 9 species of section Arachis have been assigned to G genome, the latest described so far. The genomic relationship of Arachis porphyrocalyx with these species is controversial. In the present work, we carried out a karyotypic characterisation of Arachis porphyrocalyx to evaluate its genomic structure and analyse the origin of all x = 9 Arachis species. Arachis porphyrocalyx showed a karyotype formula of 14m+4st, one pair of A chromosomes, satellited chromosomes type 8, one pair of 45S rDNA sites in the SAT chromosomes, one pair of 5S rDNA sites and pericentromeric C-DAPI+ bands in all chromosomes. Karyotype structure indicates that Arachis porphyrocalyx does not share the same genome type with the other three x = 9 species and neither with the remaining Erectoides species. Taking into account the geographic distribution, morphological and cytogenetic features, the origin of species with x = 9 of the genus Arachis cannot be unique; instead, they originated at least twice in the evolutionary history of the genus.

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“…Arachis L. (Leguminosae) is a South American genus that comprises 83 species (Krapovickas & Gregory 1994, Valls & Simpson 2005, Valls et al 2013, Santana & Valls 2015, Valls & Simpson 2017, Seijo et al 2021. According to their morphological characteristics, geographic distribution, and cross-compatibility, these species have been distributed into nine taxonomic sections: Arachis, Caulorrhizae, Erectoides, Extranervosae, Heteranthae, Procumbentes, Rhizomatosae, Trierectoides and Triseminatae (Krapovickas & Gregory 1994).…”

Section: Introductionmentioning

confidence: 99%

Genomic relationships of the polyploid rhizoma peanut (Arachis glabrata Benth.) inferred by genomic in situ hybridization (GISH)

Ortiz

Chalup

Silvestri

et al. 2023

An. Acad. Bras. Ciênc.

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The rhizoma peanut (Arachis glabrata Benth., section Rhizomatosae) is a tetraploid perennial legume. Although several A. glabrata cultivars have been developed as forage and ornamental turf, the origin and genomic constitution of this species are still unknown. In this study, we evaluated the affinity between the genomes of A. glabrata and the probable diploid donors of the sections Rhizomatosae, Arachis, Erectoides and Procumbentes by genomic in situ hybridization (GISH). Single GISH analyses detected that species of the sections Erectoides (E 2 subgenome) and Procumbentes (E 3 subgenome) were the diploid species with the highest degree of genomic affinity with A.glabrata. Based on single GISH experiments and DNA sequence similarity, three species -A. duranensis, A. paraguariensis subsp. capibarensis, and A. rigonii-, which showed the most uniform and brightest hybridization patterns and lowest genetic distance, were selected as probes for double GISH experiments. Double GISH experiments showed that A. glabrata is constituted by four identical or very similar chromosome complements.In these assays, A. paraguariensis subsp. capibarensis showed the highest brightness onto A. glabrata chromosomes. Thus, our results support the autopolyploid origin of A. glabrata and show that the species with E 2 subgenome are the most probable ancestors of this polyploid legume forage.

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Una nueva especie trifoliolada de <i>Arachis</i> (Fabaceae) y comentarios adicionales sobre la sección taxonómica <i>Trierectoides</i>

Cited by 35 publications

References 6 publications

Marker-assisted introgression of wild chromosome segments conferring resistance to fungal foliar diseases into peanut (Arachis hypogaea L.)

Marker-assisted introgression of wild chromosome segments conferring resistance to fungal foliar diseases into peanut (Arachis hypogaea L.)

Genomic characterisation of Arachis porphyrocalyx (Valls & C.E. Simpson, 2005) (Leguminosae): multiple origin of Arachis species with x = 9

Genomic relationships of the polyploid rhizoma peanut (Arachis glabrata Benth.) inferred by genomic in situ hybridization (GISH)

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Una nueva especie trifoliolada de <i>Arachis</i> (Fabaceae) y comentarios adicionales sobre la sección taxonómica <i>Trierectoides</i>

Cited by 35 publications

References 6 publications

Marker-assisted introgression of wild chromosome segments conferring resistance to fungal foliar diseases into peanut (Arachis hypogaea L.)

Marker-assisted introgression of wild chromosome segments conferring resistance to fungal foliar diseases into peanut (Arachis hypogaea L.)

Genomic characterisation of Arachis porphyrocalyx (Valls &amp; C.E. Simpson, 2005) (Leguminosae): multiple origin of Arachis species with x = 9

Genomic relationships of the polyploid rhizoma peanut (Arachis glabrata Benth.) inferred by genomic in situ hybridization (GISH)

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Genomic characterisation of Arachis porphyrocalyx (Valls & C.E. Simpson, 2005) (Leguminosae): multiple origin of Arachis species with x = 9