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Identification of QTLs for Rust Resistance in the Peanut Wild Species Arachis magna and the Development of KASP Markers for Marker-Assisted Selection.

Leal-Bertioli SC, Cavalcante U, Gouvea EG, Ballén-Taborda C, Shirasawa K, Guimarães PM, Jackson SA, Bertioli DJ, Moretzsohn MC - G3 (Bethesda) (2015)

Bottom Line: Development and adoption of rust-resistant cultivars is the most cost efficient and effective way to control the spread of the disease and reduce yield losses.The identification of genomic regions that harbor disease resistance in wild species is the first step in the implementation of marker-assisted selection that can speed the introgression of wild disease resistances and the elimination of linkage drag.Quantitative trait loci for several components of resistance were placed in the same position on linkage group B08.

View Article: PubMed Central - PubMed

Affiliation: Embrapa Genetic Resources and Biotechnology, 70770-917 Brasília, DF, Brazil, Center for Applied Genetic Technologies, University of Georgia, Athens, Georgia 30602-6810 soraya.bertioli@embrapa.br.

No MeSH data available.


Related in: MedlinePlus

Frequency distribution of rust resistance, peg, and seed characteristics (A−F) in recombinant inbred lines (F6/F7 RILs) derived from a cross of A. ipaënsis K 30076 (Ai) with A. magna K 30097 (Am). For rust tests, A. hypogaea cv. Runner IAC 886 (R) was the susceptible control. With the exception of pod constriction, for all traits the means of the parents are significantly different (P < 0.05). In (A) genotypes without symptoms (therefore without incubation period), this trait was artificially tabulated as 200.
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fig2: Frequency distribution of rust resistance, peg, and seed characteristics (A−F) in recombinant inbred lines (F6/F7 RILs) derived from a cross of A. ipaënsis K 30076 (Ai) with A. magna K 30097 (Am). For rust tests, A. hypogaea cv. Runner IAC 886 (R) was the susceptible control. With the exception of pod constriction, for all traits the means of the parents are significantly different (P < 0.05). In (A) genotypes without symptoms (therefore without incubation period), this trait was artificially tabulated as 200.

Mentions: The frequency distribution based on the pooled data for TL/LA, number of SL/LA, and incubation period (IncPer) showed strong biased toward resistance, because 41 individuals and the resistant parent presented no lesions in either experiments (Figure 2, A and B). The susceptible parent A. ipaënsis K 30076 showed greater susceptibility than the control, A. hypogaea cv. Runner IAC 886, in all components tested: larger SI, TL/LA and SL/LA, and shorter IncPer than the susceptible control (File S1). Seventeen individuals had greater SI, SL/LA, and TL/LA than the susceptible control. In addition, five had shorter IncPer (File S1). As expected, the number and size of lesions were negatively correlated with Incubation period (Pearson r = – 0.6, P < 0.005). No chlorosis was observed on any accession of the F6/F7 population. On leaves of some of the less-susceptible genotypes, necrotic areas corresponding to colonies aborted at a late developmental stage were observed.


Identification of QTLs for Rust Resistance in the Peanut Wild Species Arachis magna and the Development of KASP Markers for Marker-Assisted Selection.

Leal-Bertioli SC, Cavalcante U, Gouvea EG, Ballén-Taborda C, Shirasawa K, Guimarães PM, Jackson SA, Bertioli DJ, Moretzsohn MC - G3 (Bethesda) (2015)

Frequency distribution of rust resistance, peg, and seed characteristics (A−F) in recombinant inbred lines (F6/F7 RILs) derived from a cross of A. ipaënsis K 30076 (Ai) with A. magna K 30097 (Am). For rust tests, A. hypogaea cv. Runner IAC 886 (R) was the susceptible control. With the exception of pod constriction, for all traits the means of the parents are significantly different (P < 0.05). In (A) genotypes without symptoms (therefore without incubation period), this trait was artificially tabulated as 200.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4502374&req=5

fig2: Frequency distribution of rust resistance, peg, and seed characteristics (A−F) in recombinant inbred lines (F6/F7 RILs) derived from a cross of A. ipaënsis K 30076 (Ai) with A. magna K 30097 (Am). For rust tests, A. hypogaea cv. Runner IAC 886 (R) was the susceptible control. With the exception of pod constriction, for all traits the means of the parents are significantly different (P < 0.05). In (A) genotypes without symptoms (therefore without incubation period), this trait was artificially tabulated as 200.
Mentions: The frequency distribution based on the pooled data for TL/LA, number of SL/LA, and incubation period (IncPer) showed strong biased toward resistance, because 41 individuals and the resistant parent presented no lesions in either experiments (Figure 2, A and B). The susceptible parent A. ipaënsis K 30076 showed greater susceptibility than the control, A. hypogaea cv. Runner IAC 886, in all components tested: larger SI, TL/LA and SL/LA, and shorter IncPer than the susceptible control (File S1). Seventeen individuals had greater SI, SL/LA, and TL/LA than the susceptible control. In addition, five had shorter IncPer (File S1). As expected, the number and size of lesions were negatively correlated with Incubation period (Pearson r = – 0.6, P < 0.005). No chlorosis was observed on any accession of the F6/F7 population. On leaves of some of the less-susceptible genotypes, necrotic areas corresponding to colonies aborted at a late developmental stage were observed.

Bottom Line: Development and adoption of rust-resistant cultivars is the most cost efficient and effective way to control the spread of the disease and reduce yield losses.The identification of genomic regions that harbor disease resistance in wild species is the first step in the implementation of marker-assisted selection that can speed the introgression of wild disease resistances and the elimination of linkage drag.Quantitative trait loci for several components of resistance were placed in the same position on linkage group B08.

View Article: PubMed Central - PubMed

Affiliation: Embrapa Genetic Resources and Biotechnology, 70770-917 Brasília, DF, Brazil, Center for Applied Genetic Technologies, University of Georgia, Athens, Georgia 30602-6810 soraya.bertioli@embrapa.br.

No MeSH data available.


Related in: MedlinePlus