• SANJEEV GUPTA

      Articles written in Journal of Genetics

    • Discerning molecular diversity and association mapping for phenological, physiological and yield traits under high temperature stress in chickpea (Cicer arietinum L.)

      UDAY CHAND JHA RINTU JHA VIREVOL THAKRO ANURAG KUMAR SANJEEV GUPTA HARSH NAYYAR PARTHASARATHI BASU SWARUP K. PARIDA NARENDRA PRATAP SINGH

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      High temperature (HT) stress is assuming serious production constraint for chickpea production worldwide. A collection of 182diverse chickpea genotypes was assessed for genetic variation in 15 traits including phenological, physiological and yield-related traitsunder both normal sown (NS) and late sown (LS) conditions for two years 2017–2018 and 2018–2019, which revealed significant variationfor all the traits. Association mapping of chickpea genotypes was also conducted with 120 simple sequence repeat markers distributedacross all the chickpea chromosomes to discern the molecular diversity and to capture the significant marker-trait association (MTA). MTAanalysis based on mixed linear model (MLM) revealed a total of 24 and 14 significant associations for various traits evaluated under NSconditions in 2017 and 2018, respectively. Similarly, a total of 17 and 34 significant associations for various traits were also recorded underLS conditions in 2018 and 2019, respectively. Notably, ICCM0297, NCPGR150, TAA160 and NCPGR156 markers showed significantMTA under both NS and LS conditions and GA11 exhibited significant MTA for filled pod% under late sown condition for both years.Thus, these markers could be useful for genomics-assisted breeding for developing heat-tolerant chickpea genotype.

    • Microsatellite-based association mapping for agronomic traits in mungbean (Vigna radiata L. Wilczek)

      CHANDRA MOHAN SINGH UMASHANKER PRAJAPATI SANJEEV GUPTA ADITYA PRATAP

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      Mungbean (Vigna radiata L. Wilczek) is one of the most important warm season food legumes which contributes significantly towards nutritional security and environmental sustainability. Marker-trait association (MTA) for agronomic characters offer opportunities to deploy marker-assisted breeding for genetic amelioration of crops. This investigation was carried out with an objective to decipher population genetic structure of diverse Vigna accessions and detect microsatellite loci linked to major agronomic traits for mungbean improvement. The study was initiated with 290 diverse Vigna accessions including wild and cultivated accessions. A mungbean yellow mosaic India virus (MYMIV)-resistant association mapping panel was constructed to minimize the effect of yellow mosaic disease on crop performance. Among these, 117 accessions including 55 cultivated and 63 wild accessions were found highly resistant to MYMIV. Aftermulti-environment phenotyping, a panel of 70 MYMIV-resistant mungbean accessions was subjected to analysis for assessing the population genetic structure as well as MTA for important agronomic traits. There was sufficient genetic variation among the 70-mungbean genotypes as depicted by 91 microsatellite markers. Population genetic structure analysis grouped the genotypes into five subpopulations. The locus GMES0162 (LG4) was strongly associated with days to first flowering, whereas loci CEDG 035 (LG8), DMB SSR001 (LG6), DMB SSR008 (LG4) and CEDG 168 (LG11) were associated with pod number. These marker-trait associations will be helpful in geneticimprovement of mungbean through molecular breeding.

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