Utilizing Arachis cardenasii as a source of Cercospora leafspot resistance for peanut improvement

Stalker, H. T.

doi:10.1007/bf00021154

Cited by 29 publications

(20 citation statements)

References 12 publications

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“…Furthermore, ILs are reliable and stable genetic resources that can be multiplied and evaluated in various environments. Many valuable sources of resistance to biotic stresses including resistance to Cercospora leafspot [71], to root-Knot nematode [67,72], to Peanut Bud Necrosis virus (PBNV) [73], to late leaf spot disease [74] and sources of tolerance to abiotic stresses including tolerance to thermal stress [75] and to drought (Soraya Bertioli, Vincent Vadez personal communication) were identified in peanut wild relatives. These sources can be used for genetic improvement in peanut.…”

Section: Discussionmentioning

confidence: 99%

Genetic mapping of wild introgressions into cultivated peanut: a way toward enlarging the genetic basis of a recent allotetraploid

et al. 2009

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BackgroundPeanut (Arachis hypogaea L.) is widely used as a food and cash crop around the world. It is considered to be an allotetraploid (2n = 4x = 40) originated from a single hybridization event between two wild diploids. The most probable hypothesis gave A. duranensis as the wild donor of the A genome and A. ipaënsis as the wild donor of the B genome. A low level of molecular polymorphism is found in cultivated germplasm and up to date few genetic linkage maps have been published. The utilization of wild germplasm in breeding programs has received little attention due to the reproductive barriers between wild and cultivated species and to the technical difficulties encountered in making large number of crosses. We report here the development of a SSR based genetic map and the analysis of genome-wide segment introgressions into the background of a cultivated variety through the utilization of a synthetic amphidiploid between A. duranensis and A. ipaënsis.ResultsTwo hundred ninety eight (298) loci were mapped in 21 linkage groups (LGs), spanning a total map distance of 1843.7 cM with an average distance of 6.1 cM between adjacent markers. The level of polymorphism observed between the parent of the amphidiploid and the cultivated variety is consistent with A. duranensis and A. ipaënsis being the most probable donor of the A and B genomes respectively. The synteny analysis between the A and B genomes revealed an overall good collinearity of the homeologous LGs. The comparison with the diploid and tetraploid maps shed new light on the evolutionary forces that contributed to the divergence of the A and B genome species and raised the question of the classification of the B genome species. Structural modifications such as chromosomal segment inversions and a major translocation event prior to the tetraploidisation of the cultivated species were revealed. Marker assisted selection of BC1F1 and then BC2F1 lines carrying the desirable donor segment with the best possible return to the background of the cultivated variety provided a set of lines offering an optimal distribution of the wild introgressions.ConclusionThe genetic map developed, allowed the synteny analysis of the A and B genomes, the comparison with diploid and tetraploid maps and the analysis of the introgression segments from the wild synthetic into the background of a cultivated variety. The material we have produced in this study should facilitate the development of advanced backcross and CSSL breeding populations for the improvement of cultivated peanut.

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Section: Discussionmentioning

confidence: 99%

Genetic mapping of wild introgressions into cultivated peanut: a way toward enlarging the genetic basis of a recent allotetraploid

et al. 2009

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“…Section Arachis species constitute the secondary gene pool of the cultivated peanut (Stalker and Moss, 1987) and because of that, many accessions of those species have been characterized and evaluated for several agronomic traits, including resistance to biotic (Stalker, 1984;Pande and Rao, 2001;Michelotto et al, 2015) and abiotic stresses (Nautiyal et al, 2008;Leal-Bertioli et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Evidences that polyploidization and hybridization affected resveratrol content in Arachis interspecific hybrids

Carvalho¹,

Moretzsohn²,

Brasileiro³

et al. 2019

J. Plant Breed. Crop Sci.

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To broaden the genetic base of the allotetraploid peanut (Arachis hypogaea L.), pre-breeding programs have produced interspecific synthetic allotetraploids resulting from the chromosome duplication of hybrids between peanut related diploid species. These allotetraploids were highly cross-fertile with peanut making it possible to access the extensive genetic variability harbored by the wild species. This study aims to evaluate the impact of polyploidization and hybridization in resveratrol content in Arachis hybrids. Resveratrol is a potent antioxidant that has been shown to be useful in the treatment of many human diseases. For that, resveratrol was characterized in five synthetic allotetraploids of wild Arachis, six diploid wild species, three cultivars of A. hypogaea and three backcross (BC) hybrids between synthetic allotetraploids and A. hypogaea. Leaves from these genotypes were ultraviolet (UV) light irradiated for 2 h 30 min and their resveratrol contents were determined by high performance liquid chromatograph (HPLC). Resveratrol was found in all genotypes, but at variable concentrations. Synthetic allotetraploids and peanut did not differ and diploid species had the lowest resveratrol content. The highest concentrations were observed in hybrids between allotetraploids and cultivars of A. hypogaea that were probably the most heterozygous among the genotypes analyzed since their chromosome sets came from different species. This study data suggest a positive effect of polyploidy and hybridization in resveratrol content.

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“…and Curt.) Deighton] (Moss et al, 1981;Wynne and Halward, 1989;Stalker and Wynne, 1979), Sclerotinia blight [caused by Sclerotinia minor Jagger and S. sclerotiorum (Lib.) de Bary] (Isleib et al, 2006;Tallury et al, 2014), Cylindrocladium black root [caused by Cylindrocladium crotalariae (C.A.…”

mentioning

confidence: 99%

Identification of Smut Resistance in Wild Arachis Species and Its Introgression into Peanut Elite Lines

et al. 2019

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Peanut smut caused by Thecaphora frezii Carranza & Lindquist has been an issue for farmers and the peanut industry (Arachis hypogaea L.) in Argentina since the mid‐1990s. This disease causes pod malformation due to hypertrophy of seed tissues; in addition, colonized cells filled with teliospores give seeds a smutted mass appearance. Incidence may reach up to 52% in commercial plots, with up to 35% yield losses. Cultural management strategies and chemical treatment have not been effective; therefore, growing resistant varieties is likely to be the most effective control method for this disease. This study is aimed to identify sources of resistance in wild Arachis and to develop pre‐breeding materials for transferring the trait to cultivated peanut. After 3 yr of field trials using a randomized complete block design, the seven accessions of wild species assayed were resistant to smut. An amphidiploid [A. correntina (Burkart) Krapov. & W.C. Greg. × A. cardenasii Krapov. & W.C. Greg.] × A. batizocoi Krapov. & W.C. Greg.)4× was obtained and subsequently crossed with and experimental line of A. hypogaea for the development of a recombinant inbred line (RIL) population (89 lines). The RIL population showed a high phenotypic variability for resistance to peanut smut. The amphidiploid and 22 RILs were highly resistant, illustrating the effective transmission of resistance to peanut smut from the wild diploids into A. hypogaea. The development of RILs with resistance derived from wild species is a significant step towards the development of new peanut cultivars with different sources of resistance to peanut smut.

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Utilizing Arachis cardenasii as a source of Cercospora leafspot resistance for peanut improvement

Cited by 29 publications

References 12 publications

Genetic mapping of wild introgressions into cultivated peanut: a way toward enlarging the genetic basis of a recent allotetraploid

Genetic mapping of wild introgressions into cultivated peanut: a way toward enlarging the genetic basis of a recent allotetraploid

Evidences that polyploidization and hybridization affected resveratrol content in Arachis interspecific hybrids

Identification of Smut Resistance in Wild Arachis Species and Its Introgression into Peanut Elite Lines

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