Inheritance of Late Leafspot Resistance and Agronomic Traits in Peanut1

Jogloy, Sanun; Wynne, J. C.; Beute, M. K.

doi:10.3146/i0095-3679-14-2-9

Cited by 27 publications

(25 citation statements)

References 7 publications

(5 reference statements)

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“…Furthermore, additive genetic variance seems to contribute predominantly to the resistance (Kornegay et al 1980; Hamid et al 1981; Anderson et al 1986; Jogloy et al 1987). Groundnut breeders across the world have developed superior varieties resistant to LLS and/or rust.…”

Section: Introductionmentioning

confidence: 99%

A QTL study on late leaf spot and rust revealed one major QTL for molecular breeding for rust resistance in groundnut (Arachis hypogaea L.)

et al. 2010

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Late leaf spot (LLS) and rust are two major foliar diseases of groundnut (Arachis hypogaea L.) that often occur together leading to 50–70% yield loss in the crop. A total of 268 recombinant inbred lines of a mapping population TAG 24 × GPBD 4 segregating for LLS and rust were used to undertake quantitative trait locus (QTL) analysis. Phenotyping of the population was carried out under artificial disease epiphytotics. Positive correlations between different stages, high to very high heritability and independent nature of inheritance between both the diseases were observed. Parental genotypes were screened with 1,089 simple sequence repeat (SSR) markers, of which 67 (6.15%) were found polymorphic. Segregation data obtained for these markers facilitated development of partial linkage map (14 linkage groups) with 56 SSR loci. Composite interval mapping (CIM) undertaken on genotyping and phenotyping data yielded 11 QTLs for LLS (explaining 1.70–6.50% phenotypic variation) in three environments and 12 QTLs for rust (explaining 1.70–55.20% phenotypic variation). Interestingly a major QTL associated with rust (QTLrust01), contributing 6.90–55.20% variation, was identified by both CIM and single marker analysis (SMA). A candidate SSR marker (IPAHM 103) linked with this QTL was validated using a wide range of resistant/susceptible breeding lines as well as progeny lines of another mapping population (TG 26 × GPBD 4). Therefore, this marker should be useful for introgressing the major QTL for rust in desired lines/varieties of groundnut through marker-assisted backcrossing.Electronic supplementary materialThe online version of this article (doi:10.1007/s00122-010-1366-x) contains supplementary material, which is available to authorized users.

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Section: Introductionmentioning

confidence: 99%

A QTL study on late leaf spot and rust revealed one major QTL for molecular breeding for rust resistance in groundnut (Arachis hypogaea L.)

et al. 2010

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“…Iroume and Knauft (1987) also observed that selection among crosses would be more advantageous as compared to individual plant selection or within family selection. Whereas Jogloy et al (1987) observed that selection for resistance to LLS in F 2 generation would be ineffective due to low narrow sense heritability; the contrasting observation was made by Anderson et al (1986b) who concluded from their study that individual plant selection for LLS resistance would be effective during early generations. The preponderance of additive genetic effects in the present study also supports selection for LLS resistance in early generations.…”

Section: Resultsmentioning

confidence: 97%

“…From generation mean analysis of three crosses, Jogloy et al (1999) reported that additive and dominance gene actions were important in two crosses and in the third cross in addition to additive and dominance gene actions, epistasis (additive 9 additive) was also important. From their diallel study, Jogloy et al (1987) observed highly significant general combining ability for most of the components of LLS resistance. However, they reported only low to moderate (13-68 %) broad sense heritability and low narrow sense heritability (0-12.8 %) for them.…”

Section: Introductionmentioning

confidence: 99%

Genetic analysis of resistance to late leaf spot in interspecific groundnuts

et al. 2013

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Late leaf spot (LLS), caused by Phaeoisariopsis personata, is an important foliar fungal disease of groundnut (Arachis hypogaea L.), which causes significant economic losses globally to the crop. Inheritance of resistance to LLS disease was studied in three crosses and their reciprocals involving two resistant interspecific derivatives and a susceptible cultivar to refine strategy for LLS resistance breeding. The traits associated with LLS resistance, measured both in the field and under controlled conditions were studied following generation mean analysis. Results suggested that resistance to LLS is controlled by a combination of both, nuclear and maternal gene effects. Among nuclear gene effects, additive effect controlled majority of the variation. In JL 24 × ICG 11337 cross and its reciprocal only additive effects were important, while in JL 24 × ICG 13919 cross and its reciprocal, both additive and dominance effects contributed to the variation. Among digenic epistatic effects, additive × dominance interactions were significant. Additive-maternal effects were significant in both the crosses, while dominance-maternal effects also contributed to the variation in the crosses between the parents, JL 24 and ICG 13919. Due to significant contribution of additive effects of both nuclear and maternal inheritance to resistance to LLS, the parent, ICG 11337 would be a good donor in breeding programs. It would be worthwhile to use the resistance donor as female parent to tap maternal effects of resistance to LLS. Disease score is the best selection criterion in the field for use in breeding programs because of its high heritability and ease in measurement.

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“…Heritability values for both diseases are reported to range from low to high depending on the resistance level of the parents used in the study, making selection in early generations ineffective in crosses resulting from parents with low heritabilities (Jogloy et al 1987). Anderson et al (1991) reported that values for broad-sense heritability for lesion number, sporulation, and defoliation rating for early leaf spot were 0.57, 0.16, and 0.56 while those for late leaf spot were 0.74, 0.54, and 0.88, respectively.…”

Section: Breedingmentioning

confidence: 99%

Marker‐Assisted Selection for Biotic Stress Resistance in Peanut

Burow¹,

Leal‐Bertioli²,

Simpson³

et al. 2013

Translational Genomics for Crop Breeding

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Peanut is the second-most important legum e grown worldwide. Cultivated peanut is a disomic tetraploid, 2n-4 x -40, with limited genetic diversity due to a genetic bottleneck in formation o f the polyploid from ancestors A. duranensis and A. ipaensis. Consequently, resistance_to biotic stresses is limited in the cultigen; however, w ild species possess strong resistances. Transfer o f these re sistances is hindered by differences o f ploidy, but production o f synthetic amphidiploids, coupled with use o f m olecular markers, enables efficient gene transfer. Marker maps have been made from interspecific crosses, and SSR-based maps from cultivated parents have been developed recently. At least 410 resistance gene analogues have been identified. The first markers for biotic stress tolerance were for root-knot nematode resistance and introgressed from one A. cardenasii chromosome. These and improved markers have been used for marker-assisted backcrossing, contributing to release o f three cultivars. Additional QTLs have been identified since.Early and late leafspots cause significant yield losses worldwide, and resistance depends on multiple genes. U sing interspecific populations, five resistance QTLs for early leafspot were identified using greenhouse inoculations, and five QTLs for late leafspot were identified using detached leaf assays. U sing cultivated species populations, 28 QTLs were identified for LLS resistance; all but one w ere minor QTLs; the major QTL was donated by an interspecific introgression line parent. Rust often occurs alongside leafspots, and rust resistance was characterized as one major QTL, plus several smaller QTLs. Marker-assisted backcrossing o f this major QTL has been performed into different populations. QTLs for resistance to other biotic stresses have been identified, namely to groundnut rosette virus, Sclerotinia blight, afiatoxin contamination, aphids, and tomato spotted w ilt virus. Marker-assisted breeding is still in early stages, and develop ment o f more rapid and inexpensive markers from transcriptome and genom e sequencing is expected to accelerate progress.

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Inheritance of Late Leafspot Resistance and Agronomic Traits in Peanut1

Cited by 27 publications

References 7 publications

A QTL study on late leaf spot and rust revealed one major QTL for molecular breeding for rust resistance in groundnut (Arachis hypogaea L.)

A QTL study on late leaf spot and rust revealed one major QTL for molecular breeding for rust resistance in groundnut (Arachis hypogaea L.)

Genetic analysis of resistance to late leaf spot in interspecific groundnuts

Marker‐Assisted Selection for Biotic Stress Resistance in Peanut

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