Dhiraj Singh

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Chaetomium globosum Kunze, has been identified as a potential antagonist of Cochliobolus sativus (S. Ito & Kurib.) Deschler ex Dastur. (Syn = Drechslera sorokiniana). Production of antifungal compounds by Chaetomium globosum (Cg) and their role in suppression of spot blotch of wheat caused by this fungus under in vitro and in vivo has been evaluated.(More)
Karnal bunt of wheat, caused byNeovossia indica (Mitra) Mundkur, was first reported in 1931 from Northwestern India in experimental plantings. For many years it was a minor disease found only in Northwestern India. During the 1969–70 crop season it was unusually widespread in Northwest India and since 1974–75 Karnal bunt has been distributed throughout(More)
Quantity of litter fall, its chemical composition, nutrient addition and changes in chemical constituents of soil were studied under agroforestry systems involving Populus deltoides and Eucalyptus hybrid tree with intercrops of Cymbopogon martinii Wats and Cymbopogon flexuosus Wats in the tarai tract of Kumaon hills of U.P. India. P. deltoides had(More)
A set of 124 simple sequence repeat (SSR) markers previously developed for various Brassica sp. including B. nigra, B. oleracea, B. napus and B. rapa has been tested for cross-transferability in twelve popular varieties of B. juncea. Only 81 SSRs produced clear and distinguishable amplification products, while rest 43 primer pairs did not show any(More)
Two field experiments were conducted for two crop cycles each of two years (1985–87 and 1986–88) on an entisols to study the effect of rate and sources of N application on yield and nutrient uptake of Citronella Java (Cymbopogon winterianus Jowitt). Fresh herbage and essential oil yields were significantly influenced by application of N up to 200 kg ha−1(More)
The incidence of bakanae disease of rice was studied in the basmati growing states of Punjab, Haryana, Uttar Pradesh and Uttarakhand in India. Maximum disease incidence (20 %) was observed from the Karnal district of Haryana and Bulandshar, Ghaziabad and Mathura districts of Uttar Pradesh in rice variety Pusa Basmati 1121 and Pusa Basmati 1509. Disease was(More)
BACKGROUND Oilseed Brassica represents an important group of oilseed crops with a long history of evolution and cultivation. To understand the origin and evolution of Brassica amphidiploids, simple sequence repeat (SSR) markers were used to unravel genetic variations in three diploids and three amphidiploid Brassica species of U's triangle along with Eruca(More)
Brassica rapa (2n = 20, AA genome) is an important oil yielding species of the family Brassicaceae and characterized by wide range of genetic and morphological subtypes suitable for cultivation under diverse agro-climatic regions of India. In this study, genetic diversity among three subspecies of B. rapa including yellow sarson, toria and outlier brown(More)
The main aim of this paper is to check the microwave response on soil texture in specular direction. For this purpose, an indigenous bistatic scatterometer has been assembled at C-band which has facility to change incidence angle from 25deg to 70deg and can take observation in both like polarization (i.e., HH and VV-polarization). Four fields has been(More)
Aims: MicroRNAs (miRNAs) are small noncoding RNAs (approximately 22 nucleotides long) that have emerged as critical post-transcriptional regulators of gene expression. There is increasing evidence that miRNAs play an important role in osteoblast commitment and differentiation. The main aim of this study was to identify and characterize novel microRNAs(More)