Browsing by Author "Vikrant Singh"
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ThesisItem Open Access Performance of sugarcane genotypes under water deficit stress(Punjab Agricultural University, Ludhiana, 2021) Rajwant Kaur; Vikrant SinghIn this study, thirty-three diverse sugarcane (Saccharum spp. complex) genotypes were evaluated for drought tolerance. All 33 clones were planted in Randomized Block Design with three-replications under normal (E1), mild water stress (E2) and rainfed (E3) environments. Analysis of variance revealed significant differences among genotypes for all the traits under all environments. High magnitude of PCV, GCV, heritability and genetic advance were recorded for number of tillers (000/ha), number of shoots (000/ha), number of millable canes (000/ha), cane yield and CCS (t/ha) under both stress conditions. Correlation study showed that cane yield had significant positive association with number of tillers (000/ha), number of shoots (000/ha), NMC (000/ha) under all three environments while CMS%, proline and SOD showed significant positive association only under stressed conditions; whereas under normal environment, CCS (t/ha) exhibited significant positive association with brix%, pol%, purity%, CCS%. Regression study revealed that NMC (000/ha) is a main contributing trait for cane yield; whereas cane yield is major contributing trait for CCS (t/ha). Pol% and TSS% played major role for CCS%. Eberhart and Russel regression model analysis revealed that for cane yield, CCS% and CCS (t/ha), 10-genotypes, 12 genotypes and 12-genotypes are stable performing, respectively. GGE biplot analysis showed that genotypes with above average performances i.e. F 391/14 (26), CoPb 18181 (16), CoPb 94 (9) and F 301/11 (22) for cane yield; CoPb 18181 (16), CoPb 92 (7), CoPb 14185 (14) and CoPb 18181 (16) for CCSt/ha; F 391/14 (26), CoPb 16181 (15), SA 04-409 (31) and F 3/14 (23) for CCS% were more stable, comparatively. Expression of drought-responsive genes (P5CS, SOD, DEH, BADH, IGS, cAPX, LEA, TPS, PROT and DRP) were significantly higher in cultivar F 391/14 (resistant cultivar); whereas for cultivar CoJ 64 (susceptible cultivar) significant lower expression of genes (SOD, DRP, PROT and BADH) wereobserved.ThesisItem Open Access Synthesis and Pesticidal Activity of 1,3,4‐ Thiadiazole derivatives(IARI, DIVISON OF AGRICULTRAL CHEMICALS, 2012) Vikrant Singh; Rajesh Kumar1,3,4-Thiadiazole and its derivatives are important organic reaction intermediates and widely used by the chemists in the past to explore its biological activities. One of the starting material, 5-methyl-1,3,4-thiadiazole-2-thiol is a part of well known antibiotic, Cefazolin Sodium. Therefore, a series of 1,3,4-thiadiazole derivatives have been synthesized using an appropriate synthetic route starting from 5-methyl/amino-1,3,4-thiadiazole-2-thiols and characterized by physico-chemical and spectral data. The synthesized compounds were further taken up for their antifungal, antinemic and nitrification inhibitory activities.