Characterization of peanut lines with interspecific introgressions conferring late leaf spot resistance

Lamon, Samuele; Chu, Ye; Guimarães, Larissa Arrais; Bertioli, David J.; Leal-Bertioli, S. C. de M.; Santos, João Francisco dos; Godoy, Ignácio José de; Culbreath, A. K.; Holbrook, C. Corley; Ozias‐Akins, Peggy

doi:10.1002/csc2.20414

Cited by 19 publications

(26 citation statements)

References 34 publications

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“…Where standard spraying schemes for peanut cultivation in São Paulo incorporate nine applications of fungicides, cultivation of Sempre Verde is recommended to be grown without fungicide sprays ( 25 ). This variety is now being used as a donor of foliar disease resistance for peanut breeding in Georgia, United States ( 26 ) ( Fig. 4 D ).…”

Section: Resultsmentioning

confidence: 99%

Legacy genetics of Arachis cardenasii in the peanut crop shows the profound benefits of international seed exchange

Bertioli

Clevenger

Godoy

et al. 2021

Proc. Natl. Acad. Sci. U.S.A.

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The narrow genetics of most crops is a fundamental vulnerability to food security. This makes wild crop relatives a strategic resource of genetic diversity that can be used for crop improvement and adaptation to new agricultural challenges. Here, we uncover the contribution of one wild species accession, Arachis cardenasii GKP 10017, to the peanut crop (Arachis hypogaea) that was initiated by complex hybridizations in the 1960s and propagated by international seed exchange. However, until this study, the global scale of the dispersal of genetic contributions from this wild accession had been obscured by the multiple germplasm transfers, breeding cycles, and unrecorded genetic mixing between lineages that had occurred over the years. By genetic analysis and pedigree research, we identified A. cardenasii–enhanced, disease-resistant cultivars in Africa, Asia, Oceania, and the Americas. These cultivars provide widespread improved food security and environmental and economic benefits. This study emphasizes the importance of wild species and collaborative networks of international expertise for crop improvement. However, it also highlights the consequences of the implementation of a patchwork of restrictive national laws and sea changes in attitudes regarding germplasm that followed in the wake of the Convention on Biological Diversity. Today, the botanical collections and multiple seed exchanges which enable benefits such as those revealed by this study are drastically reduced. The research reported here underscores the vital importance of ready access to germplasm in ensuring long-term world food security.

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Section: Resultsmentioning

confidence: 99%

Legacy genetics of Arachis cardenasii in the peanut crop shows the profound benefits of international seed exchange

Bertioli

Clevenger

Godoy

et al. 2021

Proc. Natl. Acad. Sci. U.S.A.

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“…Two resistant checks, GP-NC WS 16 and IAC 322, are derivative lines from the interspecific hybrids initially created at North Carolina State University (Company et al, 1982) and have several wild chromosomal segments from A. cardenasii, an A-genome diploid species (Clevenger et al, 2017a). The contribution of late leaf spot resistance on IAC 322 from A. cardenasii introgressed regions was confirmed recently (Lamon et al, 2020). There is no known resistance to leaf spot diseases in cultivated peanut.…”

Section: Characteristicsmentioning

confidence: 97%

Registration of three peanut allotetraploid interspecific hybrids resistant to late leaf spot disease and tomato spotted wilt

Chu

Stalker

Marasigan

et al. 2021

J of Plant Registrations

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Cultivated peanut (Arachis hypogaea L.) has a narrow genetic base and is isolated from its wild relatives. This genetic bottleneck results in a lack of strong resistance to biotic and abiotic stress. However, high levels of genetic variation and resistance exist among the wild relatives. In order to enlarge the genetic base of cultivated peanut and introgress beneficial alleles from the wild relatives, interspecific hybrids were produced among a set of selected diploid species. Upon colchicine treatment, fertile allotetraploids were recovered from three combinations including (A. ipaënsis KG 30076 × A. correntina GKP 9530) 4x (Reg. no. GP-241, PI 695391), (A. ipaënsis KG 30076 × A. duranensis KGBSPSc 30060) 4x (Reg. no. GP-242, PI 695392), and (A.valida KG30011 × A. stenosperma V 10309) 4x (Reg. no. GP-243, PI 695393). All of them demonstrated high levels of resistance to leaf spot diseases in the field. Tolerance to Tomato spotted wilt virus was found in (A. valida KG 30011 × A. stenosperma V 10309) 4x . These newly created allotetraploids are cross-compatible with cultivated peanut. These genetic resources will provide peanut breeding researchers with new sources of disease resistances to improve the agronomic performance of cultivated peanut. Abbreviations: AUDPC, area under the disease progress curve; IpaCor2-GA-NC, (A. ipaënsis KG 30076 × A. correntina GKP 9530) 4x ; IpaDur3-GA-NC, (A. ipaënsis KG 30076 × A. duranensis KGBSPSc 30060) 4x ; SNP, single nucleotide polymorphism; TSWV, Tomato spotted wilt virus; ValSten1-GA-NC, (A. valida KG 30011 × A. stenosperma V 10309) 4x .This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…The induced allotetraploids GA‐BatSten1 and GA‐MagSten1 were tested for ELS, LLS, rust, and RKN using the detached leaf assay methodologies described by Lamon et al. (2021) and Leal‐Bertioli et al. (2015) (leaf pathogens) and Guimarães et al.…”

Section: Characteristicsmentioning

confidence: 99%

“…The induced allotetraploids GA-BatSten1 and GA-MagSten1 were tested for ELS, LLS, rust, and RKN using the detached leaf assay methodologies described by Lamon et al (2021) and Leal-Bertioli et al (2015) (leaf pathogens) and Guimarães et al (2017) (RKN). Peanut cultivars or breeding lines with different levels of resistance were used as checks in order to ensure infectivity of the inoculum.…”

Section: Disease Resistancementioning

confidence: 99%

Registration of GA‐BatSten1 and GA‐MagSten1, two induced allotetraploids derived from peanut wild relatives with superior resistance to leaf spots, rust, and root‐knot nematode

Bertioli

Gao

Ballén‐Taborda

et al. 2021

J of Plant Registrations

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Wild relatives of peanut harbor alleles that confer strong resistance to diseases and pests and adaptation to environmental stresses, traits that frequently cannot be found in Arachis hypogaea. However, most wild species are diploid, while cultivated peanut (A. hypogaea L.) is tetraploid. When crossed, they produce sterile progeny, thus hindering their direct use in peanut breeding. To make the alleles of three wild species accessions directly available for breeding, we developed at the University of Georgia two fertile artificially induced allotetraploids (also known as amphidiploids or neotetraploids): GA‐BatSten1 (Reg. no. GP‐239, PI 695418) and GA‐MagSten1 (GP‐240, PI 695417). They derive from crosses between wild diploid species of peanut, A. batizocoi × A. stenosperma, and A. magna × A. stenosperma, respectively. Cuttings from the sterile diploid F1s were treated with colchicine. From some of these cuttings, fertile induced tetraploid seed were produced. These induced tetraploids are compatible with cultivated peanut, carry resistance to early and late leaf spot and root‐knot nematode, and are being used in breeding programs in the United States for the production of resistant cultivars.

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Characterization of peanut lines with interspecific introgressions conferring late leaf spot resistance

Abstract: Late leaf spot (LLS) disease caused by Nothopassalora personata (Berk. & M.A. Curtis) U.

Cited by 19 publications

References 34 publications

Legacy genetics of Arachis cardenasii in the peanut crop shows the profound benefits of international seed exchange

Legacy genetics of Arachis cardenasii in the peanut crop shows the profound benefits of international seed exchange

Registration of three peanut allotetraploid interspecific hybrids resistant to late leaf spot disease and tomato spotted wilt

Registration of GA‐BatSten1 and GA‐MagSten1, two induced allotetraploids derived from peanut wild relatives with superior resistance to leaf spots, rust, and root‐knot nematode

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