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Ali S.,International Potato Center | Kadian M.S.,International Potato Center | Akhtar M.,Shibli National Post Graduate College | Arya S.,International Potato Center | And 3 more authors.
National Academy Science Letters | Year: 2015

A baseline survey of the Aphid, Myzus persicae (Sulzer) was carried out in four NE-Hill States during 2008–2011 for seed and commercial potato crop production to determine the abundance of aphids as virus vectors. Based on the findings herein, the aphid-free or low-aphid sites identified were used to extrapolate to regions to identify possible ideal locations for potato seed production at the altitudes between 1,550 and 2,700 m above mean sea level (amsl). The Shillong Peak, Laitkor Mawri, Mawkriah West in Meghalaya; Hilley Seed Potato Farm, Okhrey, Ribdi and Rawangla Seed Potato Farm in Sikkim; Upper Wanghoo and Warjung villages in Arunachal Pradesh; and Upper Ukule Kigwema and Lower Ukule Kigwema villages in Nagaland were identified suitable sites for quality potato seed production based on the aphid build-up trend during all the consecutive years of the study. © 2014, The National Academy of Sciences, India. Source


Aziz M.I.,Shibli National Post Graduate College | Ahmed I.,Shibli National Post Graduate College
Asian Journal of Chemistry | Year: 2011

Many body interactions, which includes the effect of van der Waals interactions (vWI) and three body interactions in the framework of rigid shell model, has been employed to study the lattice dynamics of plutonium arsenides. It is assumed that the overlap repulsion is effective only up to the first neighbour, while the van der Waals attraction acts up to the second neighbours and plays very important role. Because of f-d hybridization, the large LO-TO phonon splitting at zone centre predicted. The agreement between our predictions and available neutron data for phonon dispersion curves strongly supports the inclusion of van der Waals interactions. We also report the specific heat variations, two phonon IR/Raman spectra of plutonium arsenides. Source


Yadav P.,Shibli National Post Graduate College | Yadav P.,Sri DurgaJi Post Graduate College | Tripathi D.K.,Shibli National Post Graduate College | Tripathi D.K.,Sri DurgaJi Post Graduate College | And 4 more authors.
Indian Journal of Agricultural Sciences | Year: 2015

Genetic variability was estimated along with heritability (h2) and genetic advance (GA) among 45 genotypes of chickpea (Cicer arietinum L.). High genotypic and phenotypic coefficients of variability were observed for plant height, leaf length, leaflet length, width of leaflet, number of primary branches/plant, number of secondary branches/plant, number of pods/plant, pod length, pod width, 100-seed weight and seed yield/plant. The differences between genotypic and phenotypic coefficient of variability was very small in all these traits indicating negligible role of environment. The characters, which showed poor estimates for PCV and GCV were days to maturity, days to 50% flowering, number of leaflets/leaf and seeds/pod. In the present study, high heritability coupled with high genetic advance was observed for seed yield/plant, width of leaflet and primary branches/plant indicated the presence of a considerable proportion of total variability due to genetic causes particularly the additive gene effects to be important for determining these traits. On the other hand, high heritability with moderate genetic advance was observed for number of primary branches, number of secondary branches, plant height, pod length, and pods/plant indicating the influence of environment for these traits. Low heritability percentage coupled with low and moderate genetic advancement has been observed for days to maturity indicated that this trait was greatly influenced by environment. Source

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