Mean Generation Analysis of the Damage caused by &lt;I&gt;Sesamia nonagrioides&lt;/I&gt; (Lepidoptera: Noctuidae) and &lt;I&gt;Ostrinia nubilalis&lt;/I&gt; (Lepidoptera: Crambidae) in Sweet Corn Ears

Velasco, P.; Soengas, P.; Revilla, Pedro; Ordás, A.; Malvar, R. A.

doi:10.1603/0022-0493-97.1.120

Cited by 5 publications

(3 citation statements)

References 13 publications

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“…This is in concordance with previous experiments in which the dominant effects were not significant, except for one single cross [14-16]. Contrarily to stalk tunnel length, the hybrid was more ear resistant than the most resistant line indicating that dominant effects would also play an important role, in agreement with results reported by Cartea et al [18] and Velasco et al [31]. Similarly, the EP39 × EP42 hybrid exhibited a considerable degree of heterosis for most agronomic traits.…”

Section: Discussionsupporting

confidence: 93%

QTL mapping for Mediterranean corn borer resistance in European flint germplasm using recombinant inbred lines

et al. 2010

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BackgroundOstrinia nubilalis (ECB) and Sesamia nonagrioides (MCB) are two maize stem borers which cause important losses in temperate maize production, but QTL analyses for corn borer resistance were mostly restricted to ECB resistance and maize materials genetically related (mapping populations derived from B73). Therefore, the objective of this work was to identify and characterize QTLs for MCB resistance and agronomic traits in a RILs population derived from European flint inbreds.ResultsThree QTLs were detected for stalk tunnel length at bins 1.02, 3.05 and 8.05 which explained 7.5% of the RILs genotypic variance. The QTL at bin 3.05 was co-located to a QTL related to plant height and grain humidity and the QTL at bin 8.05 was located near a QTL related to yield.ConclusionsOur results, when compared with results from other authors, suggest the presence of genes involved in cell wall biosynthesis or fortification with effects on resistance to different corn borer species and digestibility for dairy cattle. Particularly, we proposed five candidate genes related to cell wall characteristics which could explain the QTL for stalk tunnelling in the region 3.05. However, the small proportion of genotypic variance explained by the QTLs suggest that there are also many other genes of small effect regulating MCB resistance and we conclude that MAS seems not promising for this trait. Two QTLs detected for stalk tunnelling overlap with QTLs for agronomic traits, indicating the presence of pleitropism or linkage between genes affecting resistance and agronomic traits.

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Section: Discussionsupporting

confidence: 93%

QTL mapping for Mediterranean corn borer resistance in European flint germplasm using recombinant inbred lines

et al. 2010

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“…Previous studies on maize found that there was no relationship between ear and stem resistance to the MCB [53,54]; therefore, the kernel damage response to MCB was not predictable at the start of these experiments. The healthiest ears were found in EPS20_Short_LIBRC3 (8.68) and EPS21_Short_LIBRC1 (8.70), while the more damaged ears were found in EPS20_Large_LIBRC3 (7.88) and EPS21_Large_LIBRC1 (8.28).…”

Section: Resultsmentioning

confidence: 85%

Is the basal area of maize internodes involved in borer resistance?

et al. 2011

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BackgroundTo elucidate the role of the length of the internode basal ring (LIBR) in resistance to the Mediterranean corn borer (MCB), we carried out a divergent selection program to modify the LIBR using two maize synthetic varieties (EPS20 and EPS21), each with a different genetic background. We investigated the biochemical mechanisms underlying the relationship between the LIBR and borer resistance. Selection to lengthen or shorten the LIBR was achieved for each synthetic variety. The resulting plants were analyzed to determine their LIBR response, growth, yield, and borer resistance.ResultsIn the synthetic variety EPS20 (Reid germplasm), reduction of the LIBR improved resistance against the MCB. The LIBR selection was also effective in the synthetic variety EPS21 (non-Reid germplasm), although there was no relationship detected between the LIBR and MCB resistance. The LIBR did not show correlations with agronomic traits such as plant height and yield. Compared with upper sections, the internode basal ring area contained lower concentrations of cell wall components such as acid detergent fiber (ADF), acid detergent lignin (ADL), and diferulates. In addition, some residual 2,4-dihydroxy-7-methoxy-(2H)-1,4-benzoxazin-3-(4H)-one (DIMBOA), a natural antibiotic compound, was detected in the basal area at 30 days after silking.ConclusionWe analyzed maize selections to determine whether the basal area of maize internodes is involved in borer resistance. The structural reinforcement of the cell walls was the most significant trait in the relationship between the LIBR and borer resistance. Lower contents of ADF and ADL in the rind of the basal section facilitated the entry of larvae in this area in both synthetic varieties, while lower concentrations of diferulates in the pith basal section of EPS20 facilitated larval feeding inside the stem. The higher concentrations of DIMBOA may have contributed to the lack of correlation between the LIBR and borer resistance in EPS21. This novel trait could be useful in maize breeding programs to improve borer resistance.

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“…Most studies have evaluated insect resistance in a wide sense, using the pith tunnel length produced by MCB under artificial infestation as the classifying criteria (Malvar et al, 1993;Butroń et al, 1999;Velasco et al, 1999a;Velasco et al, 1999b;Malvar et al, 2004;Velasco et al, 2004a;Butroń et al, 2005;Butroń et al, 2006;Malvar et al, 2007;Revilla et al, 2007). Once sources of resistance were identified (Butroń et al, 1999;Malvar et al, 2004), research was oriented to study trait inheritance (Cartea et al, 1999;Velasco et al, 2002;Velasco et al, 2004b;Butroń et al, 2009) and to develop the most suitable phenotypic selection programs to increase maize resistance and/or tolerance to MCB (Sandoya et al, 2008;Butroń et al, 2012;Ordaś et al, 2012;Samayoa et al, 2012;Butroń et al, 2014).…”

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confidence: 99%

Genomic versus phenotypic selection to improve corn borer resistance and grain yield in maize

et al. 2023

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IntroductionThe study of yield and resistance/tolerance to pest are related traits fundamental for maize breeding programs. Genomic selection (GS), which uses all marker information to calculate genomic breeding values, is presented as an emerging alternative to phenotypic and marker-assisted selections for improving complex traits controlled by many genes with small effects. Therefore, although phenotypic selection (PS) has been effective for increasing resistance and yield under high infestation with maize stem borers, higher genetic gains are expected to be obtained through GS based on the complex architecture of both traits. Our objective was to test whether GS is more effective than PS for improving resistance and/or tolerance to maize stem borers and grain yield.MethodsFor this, we compared different selection programs based on phenotype and genotypic value for a single trait, resistance or yield, and for both traits together.Results and discussionWe obtained that GS achieved the highest genetic gain for yield, meanwhile phenotypic selection for yield was the program that achieved the highest reduction of tunnel length, but was ineffective for increasing yield. However, phenotypic or genomic selection for increased resistance may be more effective in improving both traits together; although the gains per cycle would be small for both traits.

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Mean Generation Analysis of the Damage caused by <I>Sesamia nonagrioides</I> (Lepidoptera: Noctuidae) and <I>Ostrinia nubilalis</I> (Lepidoptera: Crambidae) in Sweet Corn Ears

Cited by 5 publications

References 13 publications

QTL mapping for Mediterranean corn borer resistance in European flint germplasm using recombinant inbred lines

QTL mapping for Mediterranean corn borer resistance in European flint germplasm using recombinant inbred lines

Is the basal area of maize internodes involved in borer resistance?

Genomic versus phenotypic selection to improve corn borer resistance and grain yield in maize

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