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Author: search.filters.author.Jha, Uday ChandSubject: search.filters.subject.Fusarium wilt

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    Association mapping of genomic loci linked with Fusarium wilt resistance (Foc 2) in chickpea
    (Cambridge University Press, 2021) Jha, Uday Chand; Jha, Rintu; Bohra, Abhishek; Manjunatha, Lakshmaiah; Saabale, Parasappa Rajappa; Parida, Swarup K.; Chaturvedi, Sushil Kumar; Thakro, Virevol; Singh, Narendra Pratap
    Improving plant resistance against Fusarium wilt (FW) is key to sustaining chickpea production worldwide. Given this, the current study tested a set of 75 FW-responsive chickpea breeding lines including checks in a wilt-sick plot for two consecutive years (2016 and 2017). Genetic diversity analysis using 75 simple sequence repeats (SSRs) revealed a total of 267 alleles with an average of 3.56 alleles per marker. The entire set was divided into two major classes based on clustering method and factorial analysis. Similarly, STRUCTURE analysis placed the 75 genotypes into three distinct sub-groups (K = 3). Marker-trait association (MTA) analysis using the generalized linear model approach revealed nine and eight significant MTAs for FW resistance in the years 2016 and 2017, respectively. Three significant MTAs were obtained for FW resistance following the mixed linear model approach for both years. The SSR markers CESSR433, NCPGR21 and ICCM0284 could be potentially employed for targeted and accelerated improvement of FW resistance in chickpea. To the best of our knowledge, this is the first report on association mapping of the genomic loci controlling FW (Foc2) resistance in chickpea.
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    Breeding, genetics, and genomics approaches for improving fusarium wilt resistance in major grain legumes
    (Frontiers Media S.A., 2020) Jha, Uday Chand; Bohra, Abhishek; Pandey, Shailesh; Parida, Swarup K.
    Fusarium wilt (FW) disease is the key constraint to grain legume production worldwide. The projected climate change is likely to exacerbate the current scenario. Of the various plant protection measures, genetic improvement of the disease resistance of crop cultivars remains the most economic, straightforward and environmental-friendly option to mitigate the risk. We begin with a brief recap of the classical genetic efforts that provided first insights into the genetic determinants controlling plant response to different races of FW pathogen in grain legumes. Subsequent technological breakthroughs like sequencing technologies have enhanced our understanding of the genetic basis of both plant resistance and pathogenicity. We present noteworthy examples of targeted improvement of plant resistance using genomics-assisted approaches. In parallel, modern functional genomic tools like RNA-seq are playing a greater role in illuminating the various aspects of plant-pathogen interaction. Further, proteomics and metabolomics have also been leveraged in recent years to reveal molecular players and various signaling pathways and complex networks participating in host-pathogen interaction. Finally, we present a perspective on the challenges and limitations of highthroughput phenotyping and emerging breeding approaches to expeditiously develop FW-resistant cultivars under the changing climate.