Avaliação de espécies silvestres e cultivares de amendoim para resistência a Enneothrips flavens Moulton

Janini, Júlio César; Júnior, Arlindo Leal Boiça; Godoy, Ignácio José de; Michelotto, Marcos Doniseti; Fávero, A. P.

doi:10.1590/s0006-87052010000400015

Cited by 7 publications

(8 citation statements)

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“…These genotypes were therefore less infested and suffered less damage caused by the insect compared to the genotypes of A. hypogaea L., corroborating the research results of Janini et al (2010) and Michelotto, Godoy, Fávero, Carrega, and Finoto (2013). The lower infestation and minor damage exhibited by the wild genotypes were observed in the first evaluation and remained throughout the plant cycle.…”

Section: Resultssupporting

confidence: 83%

“…Pre-breeding research on crossings of A. hypogaea L. with wild germplasm has been conducted in Brazil with the aim of identifying sources of resistance to major pests and foliar diseases (Fávero, Simpson, Valls, & Vello, 2006;Fávero, Moraes, Garcia, Valls, & Vello, 2009;Janini, Boiça Júnior, Godoy, Michelotto, & Fávero, 2010;Michelotto et al, 2015;Santos et al, 2011;Santos, Godoy, Michelotto, & Fávero, 2013). One of the crosses made involved an elite cultivar from the Instituto Agronômico de Campinas (IAC 503) and the amphidiploid (A. magna x A. cardenasii) 4x .…”

Section: Introductionmentioning

confidence: 99%

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Resistance to Enneothrips flavens Moulton and genetic parameters estimation in interspecific genotypes of peanut

et al. 2017

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ABSTRACT. Peanut is an oilseed crop of great importance for Brazilian agribusiness. A major factor affecting its production is pest incidence, mainly thrips. This study aimed to evaluate the potential for resistance to Enneothrips flavens in genotypes derived from the cross between IAC 503 and the amphidiploid (A. magna x A. cardenasii) 4x and to estimate the genetic and phenotype parameters in these genotypes, allowing for better targeting in the selection. The experiments were conducted in a Federer augmented block design with additional checks in two generations (F 3 and F 4 ) . Resistance to thrips was evaluated by its natural infestation and the symptoms of attacks by the insect. They were also evaluated using agronomic trait indicators of interspecific segregating with cultivated species. The results indicated that the selected progeny exhibited high resistance to thrips compared to commercial genotypes, and they had the amphidiploid as the insect resistance source. Some progenies selected as resistant also had good production traits, but with the degree of suitability to the A. hypogaea L. genotypes still low, the use of a backcross as an alternative for the introgression of resistance genes and the consequent recovery of adapted genotypes of superior recurring parents is suggested.Keywords: Arachis hypogaea L., thrips, resistance to insects, REML/BLUP. , assim como estimar os parâmetros genéticos e fenotípicos em tais genótipos, como auxiliares no processo de seleção. Os experimentos foram conduzidos no esquema de blocos aumentados com testemunhas intercalares em duas gerações (F 3 e F 4 ). A resistência ao tripes foi avaliada pela sua infestação natural e pelos sintomas de injúrias causadas pelo inseto. Foram avaliados também, caracteres agronômicos como indicadores da proximidade dos genótipos segregantes ao cultivado. Com base nos resultados, observou-se que as progênies selecionadas apresentaram maior resistência ao tripes quando comparadas aos genótipos cultivados, tendo o anfidiploide como fonte de resistência ao inseto. Algumas progênies selecionadas como resistentes, também apresentaram bons componentes de produção, porém, com grau de adequação aos genótipos A. hypogaea L. ainda pequeno, o que sugere o uso de retrocruzamentos como alternativa na introgressão de genes de resistência e consequente recuperação dos genótipos adaptados dos genitores recorrentes. Resistência a Enneothrips flavens Palavras-chave:Arachis hypogaea L., tripes, resistência a insetos, REML/BLUP.

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Section: Resultssupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Resistance to Enneothrips flavens Moulton and genetic parameters estimation in interspecific genotypes of peanut

et al. 2017

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“…Milla (2003) and Milla et al (2004) used a segregating F 2 population of the A-genome diploid cross A. kuhlmannii ´ A. diogoi to evaluate Tomato spotted wilt virus resistance and discovered five linked AFLP markers associated with resistance. Other interspecific populations and wild species are also promising for introgression of resistance to the thrips (Enne-othrips flavens) ( Janini et al, 2010). Stalker, unpublished data, 2016).…”

Section: Molecular Technologiesmentioning

confidence: 99%

Utilizing Wild Species for Peanut Improvement

2017

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The cultivated peanut (Arachis hypogaea L.) is an allotetraploid species with a very large and complex genome. This species is susceptible to numerous foliar and soil‐borne diseases for which only moderate levels of resistance have been identified in the germplasm collection, but several of the 81 wild species are extremely resistant to many destructive peanut diseases. Peanut species were grouped into nine sections, but only taxa in section Arachis will hybridize with A. hypogaea. Most of these species are diploid, but two aneuploids and two tetraploids also exist in the section. The first peanut cultivars released after interspecific hybridization were ‘Spancross’ and ‘Tamnut 74’ during the 1970s from a cross between A. hypogaea and its tetraploid progenitor. However, introgression of useful genes from diploids has been difficult due to sterility barriers resulting from genomic and ploidy differences. To utilize diploids in section Arachis, direct hybrids have been made between A. hypogaea and diploid species, the chromosome number doubled to the hexaploid level, and then tetraploids recovered with resistances to nematodes, leaf spots, rust, and numerous insect pests. ‘Bailey’, a widely grown Virginia‐type peanut, was released from these materials, and other cultivars are gown in Asia and South America. Alternatively, hybrids between diploid A and B genome species have been made, the chromosome number doubled, and cultivars released with nematode resistance derived from Arachis species. Introgression from Arachis species to A. hypogaea appears to be in large blocks rather than as single genes, and new genotyping strategies should enhance utilization of wild peanut genetic resources.

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“…and causes serious losses in the U.S.A. segregating population of F 2 plants of the A-genome diploid cross A. kuhlmannii 3 A. diogoi was screened for resistance to TSWV, and five linked AFLP markers on one chromosome were associated with resistance at a high statistical threshold (Milla et al, 2004;Milla, 2003). In Brazil, interspecific populations and wild species have also been found as promising for introgression of resistance to the thrips, Enne-othrips flavens (Janini et al, 2010). Domestication Traits.…”

Section: Tomato Spotted Wilt Virus (Tswv)mentioning

confidence: 99%

The Value of Diploid Peanut Relatives for Breeding and Genomics

et al. 2013

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Collection, evaluation, and introgression research has been conducted with Arachis species for more than 60 years. Eighty species in the genus have been described and additional species will be named in the future. Extremely high levels of disease and insect resistances to immunity have been observed in many species of the genus as compared to the cultivated peanut, which makes them extremely important for crop improvement. Many thousands of interspecific hybrids have been produced in the genus, but introgression has been slow because of genomic incompatibilities and sterility of hybrids. Genomics research was initiated during the late 1980s to characterize species relationships and investigate more efficient methods to introgress genes from wild species to A. hypogaea. Relatively low density genetic maps have been created from inter-and intra-specific crosses, several of which have placed disease resistance genes into limited linkage groups. Of particular interest is associating molecular markers with traits of interest to enhance breeding for disease and insect resistances. Only recently have sufficiently large numbers of markers become available to effectively conduct marker assisted breeding in peanut. Future analyses of the diploid ancestors of the cultivated peanut, A. duranensis and A. ipaensis, will allow more detailed characterization of peanut genetics and the effects of Arachis species alleles on agronomic traits. Extensive efforts are being made to create populations for genomic analyses of peanut, and introgression of genes from wild to cultivated genotypes should become more efficient in the near future.

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Avaliação de espécies silvestres e cultivares de amendoim para resistência a Enneothrips flavens Moulton

Cited by 7 publications

References 8 publications

<b>Resistance to <i>Enneothrips flavens</i> Moulton and genetic parameters estimation in interspecific genotypes of peanut

<b>Resistance to <i>Enneothrips flavens</i> Moulton and genetic parameters estimation in interspecific genotypes of peanut

Utilizing Wild Species for Peanut Improvement

The Value of Diploid Peanut Relatives for Breeding and Genomics

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