Inheritance of rust resistance in cultivated groundnut (<i>Arachis hypogaea</i>L.)

Jakkeral, Shridevi A.; Nadaf, H. L.; Gowda, M. V. C.; Bhat, Rohini

doi:10.5958/j.0975-6906.73.4.069

Cited by 5 publications

(2 citation statements)

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“…Genotype ICG 11426 is a breeding line developed at ICRISAT, India with resistance to rust, early leaf spot and late leaf spot disease (Sudini et al, 2015). GPBD 4 is an improved Spanish bunch groundnut variety with early maturity, high yield, high pod growth rate, desirable pod and kernel features, high oil content and resistance to rust and late leaf spots (Jakkeral et al, 2013).…”

Section: Post-penetrationmentioning

confidence: 99%

Early Interactions of Rust Pathogen Puccinia arachidis (Speg.) with Groundnut Genotypes Varying in Resistance

Ramya¹,

Thilak²,

Devi³

et al. 2022

IJBSM

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The study was conducted in the Department of Plant Pathology, College of Agriculture, Rajendranagar, Professor Jayashankar Telangana State Agricultural University, Hyderabad, India to understand the histopathological mechanisms of initial interaction of Puccinia arachidis with six groundnut genotypes. Fully expanded quadrifoliate leaves were inoculated with P. arachidis using the detached leaf assay. Five-mm leaf discs were cut at 6 hours after inoculation (hai) and each day until 5 days after inoculation (dai) and examined for histopathological interactions. Germination of urediniospores was detected during 6–8 hai and continued until 24 hai. There were no differences in pre-penetration and penetration among all the six genotypes. Differences in post-penetration were observed among the genotypes during 3–5 dai. In genotypes TMV 2 and K 6, extensive hyphal colonization was observed in the intercellular spaces of mesophyll cells by 4–5 dai indicating compatible interaction and susceptibility to rust disease. Sparse hyphal growth and corresponding mesophyll cell death at 3–5 dai in genotypes ICGV 171015 and ICGV 13229 indicated defense response by the host and moderate resistance. In genotypes ICG 11426 and GPBD 4, complete arrest of hyphal growth by 4–5 dai due to extensive mesophyll necrosis suggested incompatible interaction and resistance to rust. This is the first documentation of the histopathological description of the initial infection strategies of P. arachidis in the selected groundnut genotypes.

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Section: Post-penetrationmentioning

confidence: 99%

Early Interactions of Rust Pathogen Puccinia arachidis (Speg.) with Groundnut Genotypes Varying in Resistance

Ramya¹,

Thilak²,

Devi³

et al. 2022

IJBSM

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“…Qualitative and quantitative inheritances of traits have been reported. Generally, majority of morphological (e.g., growth and branching, leaf, pod and seed traits), quality (e.g., protein and oil) and disease resistance (leaf spots, rust) traits were reported to have predominantly qualitative inheritance (e.g., Asibuo et al., ; Gangadhara & Nadaf, ; Jakkeral, Nadaf, Gowda, & Bhat, ; Pattanashetti, Gowda, & Girija, ; Upadhyaya & Nigam, , , ). But quantitative inheritances were also reported for some of the traits such as oil content and quality (Aruna & Nigam, ; Dwivedi, Pande, Rao, & Nigam, ; Khedikar et al., ; Pandey, Wang, et al., ; Sarvamangala, Gowda, & Varshney, ; Shasidhar et al., ; Sujay et al., ; Wilson et al., ).…”

Section: Geneticsmentioning

confidence: 99%

Genetics, genomics and breeding of groundnut (Arachis hypogaeaL.)

Desmae

Janila

Okori³

et al. 2018

Plant Breeding

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Groundnut is an important food and oil crop in the semiarid tropics, contributing to household food consumption and cash income. In Asia and Africa, yields are low attributed to various production constraints. This review paper highlights advances in genetics, genomics and breeding to improve the productivity of groundnut. Genetic studies concerning inheritance, genetic variability and heritability, combining ability and trait correlations have provided a better understanding of the crop's genetics to develop appropriate breeding strategies for target traits. Several improved lines and sources of variability have been identified or developed for various economically important traits through conventional breeding. Significant advances have also been made in groundnut genomics including genome sequencing, marker development and genetic and trait mapping. These advances have led to a better understanding of the groundnut genome, discovery of genes/variants for traits of interest and integration of marker‐assisted breeding for selected traits. The integration of genomic tools into the breeding process accompanied with increased precision of yield trialing and phenotyping will increase the efficiency and enhance the genetic gain for release of improved groundnut varieties.

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