Divergência genética de cultivares de cana-de-açúcar quanto à resistência a Diatraea saccharalis

Souza, Joseane Rodrigues de; Júnior, Arlindo Leal Boiça; Pérecin, Dilermando; Filho, Alberto Cargnelutti; Costa, Jacqueline Tonielo da

doi:10.5433/1679-0359.2013v34n6suppl1p3367

Cited by 1 publication

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results are in contrast to previous studies, which indicated differences among sugarcane genotypes in larval survival and weight and pupation (White et al, 2011;Dinardo-Miranda et al, 2012;Souza et al, 2013), suggesting the presence of antibiosis or feeding deterrence in stalks of some sugarcane genotypes.…”

Section: Performance Of Late-stages Larvaecontrasting

confidence: 56%

“…However, Coburn and Hensley (1972) attributed the higher mortality of young larvae to tightness of the leaf-sheaths while White (1993a) attributed it to the presence of physical or chemical barriers preventing or delaying larvae entrance into the stalks. Other studies also suggest that antibiosis is related with presence of chemical compounds (Souza et al, 2013, White et al, 2011. In addition, some sugarcane genotypes present low stalk damage, adult emergence and larval weight (Dinardo-Miranda et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…Despite of the knowledge about resistance traits in sugarcane genotypes, there are only a few studies of resistance of Brazilian genotypes to D. saccharalis found in the literature (Dinardo-Miranda et al, 2012Souza et al, 2013). Therefore, the purpose of this study was to assess multiple resistance traits in eight sugarcane genotypes against D. saccharalis, including five commercial cultivars and three exotic germplasm with potential to serve as resistance sources against this pest.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Oviposition preference and larval performance of sugarcane borer in eight sugarcane genotypes

et al. 2017

View full text Add to dashboard Cite

The sugarcane borer Diatraea saccharalis Fabr. (Lepidoptera: Crambidae) is one of the most important pests of sugarcane in the Americas. The purpose of this study was to assess multiple resistance traits in eight sugarcane genotypes against D. saccharalis, including five commercial cultivars and three exotic germplasm with potential to serve as resistance sources against this pest. The oviposition preference was assessed by using both free-choice and non-choice tests. The performance of both early stage larvae feeding on the leaves and late stages larvae feeding within the stalks were also assessed. There were differences among genotypes for number of both eggs and egg cluster in the free-choice test while no differences in non-choice test were observed. There were also differences in survival of early stage larvae feeding on the leaves, foliar injury rating and stalk damage. The genotype IM76-228 was the least preferred for oviposition and it seems that leaf width had some influence on adults' preference rather than greening of the leaves. IM76-228 and RB867515 causes higher mortality of early stage larvae feeding in the stalks while IM76-228 and RB985523 had lower damage in both leaves and stalks. The genotype IM76-228 was the most resistant to D. saccharalis and could serve as genes sources for resistance in sugarcane breeding programs.Index terms: Saccharum spp.; Diatraea saccharalis; host-plant resistance. RESUMOA broca da cana-de-açúcar Diatraea saccharalis Fabr. (Lepidoptera: Crambidae) é uma das mais importantes pragas da cana-de-açúcar nas Américas. Este estudo foi realizado para investigar múltiplos traços de resistência em oito genótipos de cana-de-açúcar contra D. saccharalis, incluindo cinco cultivares comerciais e três germoplasmas exóticos com potencial para servir de fontes de resistência contra esta praga. A preferência de oviposição foi avaliada por meio de testes de escolha livre e de não-escolha. O desempenho de larvas de estágio inicial que se alimentam das folhas e de larvas de estádio tardio alimentando-se com os colmos também foi avaliado. Houve diferenças entre os genótipos para o número de ovos e posturas no teste de livre escolha, enquanto não foram observadas diferenças no teste de não-escolha. Houve também diferenças na sobrevivência de larvas de estádios iniciais que se alimentam das folhas, índice de lesões e dano no colmo. O genótipo IM76-228 foi o menos preferido para a oviposição e parece que a largura da folha teve alguma influência sobre a preferência dos adultos em vez da intensidade de verde das folhas. IM76-228 e RB867515 provocaram uma mortalidade mais elevada de larvas de estádio inicial alimentando-se dos colmos, enquanto que IM76-228 e RB985523 apresentaram menor dano nas folhas e nos colmos. O genótipo IM76-228 foi o mais resistente a D. saccharalis e pode servir como fonte de genes para resistência em programas de melhoramento de cana-de-açúcar.Termos para indexação: Saccharum spp.; Diatraea saccharalis; resistência de plantas hospedeiras.

show abstract

Section: Performance Of Late-stages Larvaecontrasting

confidence: 56%