Taxonomía del género &lt;i&gt;Arachis&lt;/i&gt; (Leguminosae)

Krapovickas, Antonio; Gregory, W. C.

doi:10.30972/bon.160158

Cited by 269 publications

(427 citation statements)

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“…The complete homology observed here in the insertion and deletion sequences that manifested A. monticola and A. hypogaea tetraploid taxa very near and similar genome composition. The current finding also justifies the high rate of crossability and achieving fertile progenies reported by Krapovickas and Gregory (1994). Albeit, the dendrogram of tetraploid species, showed that A. monticola grouped separately from the other botanical types, which affirms the belief that it is a separate species from A. hypogaea .…”

Section: Discussionsupporting

confidence: 87%

“…Arachis species is considered to be the most diverse, holding both annual and perennial species and distinct chromosome numbers, karyotype structures and ploidy levels as it was a group apart but very close to Erectoides and Procumbentes Krapovickas and Gregory, 1994). On the other hand, Heteranthae and Caulorrhizae grouped together indicating that some species of the sections Heteranthae and Caulorrhizae may be capable of producing hybrids with Arachis section while a substantial genetic isolation persists with the other sections (Bertioli et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, Heteranthae and Caulorrhizae grouped together indicating that some species of the sections Heteranthae and Caulorrhizae may be capable of producing hybrids with Arachis section while a substantial genetic isolation persists with the other sections (Bertioli et al, 2016). According to Krapovickas and Gregory (1994) sections, Extranervosae and Triseminatae are the most detached sections, however, their evolutionary place is yet to be decided (see Stalker, 2017). This study confirms the above assumption for Triseminatae as the most isolated section from the remaining sections.…”

Section: Discussionmentioning

confidence: 99%

“…The genus Arachis is indigenous to South America and its different species are widespread in >100 countries of the world and includes 80 species (Krapovickas and Gregory, 1994; Valls and Simpson, 2005). Based on the morphological variation, geographic distribution and ability to cross (cross compatibility), these species are grouped into nine sections namely Arachis, Caulorrhizae, Erectoides, Extranervosae, Heteranthae, Procumbentes, Rhizomatosae, Triseminatae, and Trierectoides .…”

Section: Introductionmentioning

confidence: 99%

“…The cultivated tetraploid, A. hypogaea , is considered to have originated from two diploid species namely Arachis duranensis (AA) and Arachis ipaënsis (BB) (Seijo et al, 2004). All the cultivated genotypes can be further grouped into subspecies ( hypogaea and fastigiata ), varieties ( aequatoriana, fastigiata, hirsuta, hypogaea, peruviana, and vulgaris) and agronomic types (Spanish, Southeast-runner, Valencia, and Virginia) (Krapovickas and Gregory, 1994, 2007). …”

Section: Introductionmentioning

confidence: 99%

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Genome-Wide Discovery and Deployment of Insertions and Deletions Markers Provided Greater Insights on Species, Genomes, and Sections Relationships in the Genus Arachis

et al. 2017

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Small insertions and deletions (InDels) are the second most prevalent and the most abundant structural variations in plant genomes. In order to deploy these genetic variations for genetic analysis in genus Arachis, we conducted comparative analysis of the draft genome assemblies of both the diploid progenitor species of cultivated tetraploid groundnut (Arachis hypogaea L.) i.e., Arachis duranensis (A subgenome) and Arachis ipaënsis (B subgenome) and identified 515,223 InDels. These InDels include 269,973 insertions identified in A. ipaënsis against A. duranensis while 245,250 deletions in A. duranensis against A. ipaënsis. The majority of the InDels were of single bp (43.7%) and 2–10 bp (39.9%) while the remaining were >10 bp (16.4%). Phylogenetic analysis using genotyping data for 86 (40.19%) polymorphic markers grouped 96 diverse Arachis accessions into eight clusters mostly by the affinity of their genome. This study also provided evidence for the existence of “K” genome, although distinct from both the “A” and “B” genomes, but more similar to “B” genome. The complete homology between A. monticola and A. hypogaea tetraploid taxa showed a very similar genome composition. The above analysis has provided greater insights into the phylogenetic relationship among accessions, genomes, sub species and sections. These InDel markers are very useful resource for groundnut research community for genetic analysis and breeding applications.

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Section: Discussionsupporting

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Genome-Wide Discovery and Deployment of Insertions and Deletions Markers Provided Greater Insights on Species, Genomes, and Sections Relationships in the Genus Arachis

et al. 2017

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Marker‐Assisted Selection for Biotic Stress Resistance in Peanut

Burow¹,

Leal‐Bertioli²,

Simpson³

et al. 2013

Translational Genomics for Crop Breeding

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Peanut is the second-most important legum e grown worldwide. Cultivated peanut is a disomic tetraploid, 2n-4 x -40, with limited genetic diversity due to a genetic bottleneck in formation o f the polyploid from ancestors A. duranensis and A. ipaensis. Consequently, resistance_to biotic stresses is limited in the cultigen; however, w ild species possess strong resistances. Transfer o f these re sistances is hindered by differences o f ploidy, but production o f synthetic amphidiploids, coupled with use o f m olecular markers, enables efficient gene transfer. Marker maps have been made from interspecific crosses, and SSR-based maps from cultivated parents have been developed recently. At least 410 resistance gene analogues have been identified. The first markers for biotic stress tolerance were for root-knot nematode resistance and introgressed from one A. cardenasii chromosome. These and improved markers have been used for marker-assisted backcrossing, contributing to release o f three cultivars. Additional QTLs have been identified since.Early and late leafspots cause significant yield losses worldwide, and resistance depends on multiple genes. U sing interspecific populations, five resistance QTLs for early leafspot were identified using greenhouse inoculations, and five QTLs for late leafspot were identified using detached leaf assays. U sing cultivated species populations, 28 QTLs were identified for LLS resistance; all but one w ere minor QTLs; the major QTL was donated by an interspecific introgression line parent. Rust often occurs alongside leafspots, and rust resistance was characterized as one major QTL, plus several smaller QTLs. Marker-assisted backcrossing o f this major QTL has been performed into different populations. QTLs for resistance to other biotic stresses have been identified, namely to groundnut rosette virus, Sclerotinia blight, afiatoxin contamination, aphids, and tomato spotted w ilt virus. Marker-assisted breeding is still in early stages, and develop ment o f more rapid and inexpensive markers from transcriptome and genom e sequencing is expected to accelerate progress.

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Legumes for Tropical and Subtropical Areas

Pitman

Vendramini

2020

Forages

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Taxonomía del género <i>Arachis</i> (Leguminosae)

Cited by 269 publications

References 0 publications

Genome-Wide Discovery and Deployment of Insertions and Deletions Markers Provided Greater Insights on Species, Genomes, and Sections Relationships in the Genus Arachis

Genome-Wide Discovery and Deployment of Insertions and Deletions Markers Provided Greater Insights on Species, Genomes, and Sections Relationships in the Genus Arachis

Marker‐Assisted Selection for Biotic Stress Resistance in Peanut

Legumes for Tropical and Subtropical Areas

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