Person:
Jaiswal, J.P.

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Jaiswal
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J.P.
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Jaiswal, J.P.
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0000-0003-0188-1850

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2015 - 201922020 - 20221
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    Genome-wide association study identifies loci and candidate genes for grain micronutrients and quality traits in wheat (Triticum aestivum L.)
    (Nature Publishing Group, 2022) Rathan, N.D.; Krishna, H.; Ellur, R.K.; Sehgal, D.; Velu, G.; Ahlawat, A.K.; Krishnappa, G.; Jaiswal, J.P.; Singh, J.B.; SV, S.; Ambati, D.; Singh, S.K.; Bajpai, K.; Mahendru-Singh, A.
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    Harnessing genetic potential of wheat germplasm banks through impact-oriented-prebreeding for future food and nutritional security
    (Nature Publishing Group, 2018) Singh, S.; Vikram, P.; Sehgal, D.; Burgueño, J.; Sharma, A.R.; Singh, S.K.; Sansaloni, C.; Joynson, R.; Brabbs, T.; Ortiz, C.; Solís Moya, E.; Velu, G.; Gupta, N.; Sidhu, H.S.; Basandrai, A.K.; Basandrai, D.; Ledesma-Ramires, L.; Suaste-Franco, M.P.; Fuentes Dávila, G.; Ireta Moreno, J.; Sonder, K.; Vaibhav K. Singh; Sajid Shokat; Shokat, S.; Mian A. R. Arif; Khalil A. Laghari; Puja Srivastava; Bhavani, S.; Satish Kumar; Pal, D.; Jaiswal, J.P.; Kumar, U.; Harinder K. Chaudhary; Crossa, J.; Payne, T.S.; Imtiaz, M.; Sohu, V.S.; Singh, G.P.; Bains, N.; Hall, A.J.W.; Pixley, K.V.
    The value of exotic wheat genetic resources for accelerating grain yield gains is largely unproven and unrealized. We used next-generation sequencing, together with multi-environment phenotyping, to study the contribution of exotic genomes to 984 three-way-cross-derived (exotic/elite1//elite2) pre-breeding lines (PBLs). Genomic characterization of these lines with haplotype map-based and SNP marker approaches revealed exotic specific imprints of 16.1 to 25.1%, which compares to theoretical expectation of 25%. A rare and favorable haplotype (GT) with 0.4% frequency in gene bank identified on chromosome 6D minimized grain yield (GY) loss under heat stress without GY penalty under irrigated conditions. More specifically, the ‘T’ allele of the haplotype GT originated in Aegilops tauschii and was absent in all elite lines used in study. In silico analysis of the SNP showed hits with a candidate gene coding for isoflavone reductase IRL-like protein in Ae. tauschii. Rare haplotypes were also identified on chromosomes 1A, 6A and 2B effective against abiotic/biotic stresses. Results demonstrate positive contributions of exotic germplasm to PBLs derived from crosses of exotics with CIMMYT’s best elite lines. This is a major impact-oriented pre-breeding effort at CIMMYT, resulting in large-scale development of PBLs for deployment in breeding programs addressing food security under climate change scenarios.
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    Genetic diversity analysis in Exotic germplasm accessions of Wheat (Triticum aestivum L.) by cluster analysis
    (Elsevier, 2015) Tewari, R.K.; Jaiswal, J.P.; Rishi Pal Gangwar; Singh, P.K.
    The present investigation was planned to assess genetic diversity for yield, yield contributing traits and resistance to spot blotch disease of wheat in two hundred exotic germplasm accessions of bread wheat. The germplasm along with 4 checks were evaluated in augmented block design at G.B. Pant University of Agriculture & Technology, Pantnagar during 2013-14. The genotypes were evaluated for eight quantitative traits and spot blotch incidence. The germplasm accessions showed wide variability for the studied traits and these were grouped into different clusters using Non-hierarchical Euclidean cluster analysis. On this basis, 200 wheat accessions were categorized into 8 clusters. The intra cluster distance was maximum for the cluster VII (2.431) and minimum for the cluster VIII (1.813). Inter cluster distance was maximum between cluster I and VIII (7.263) and minimum between cluster III and IV (2.292). So, larger the distance between the clusters better the chances of getting transgressive segregants.
    Publication