The performance and competitiveness of export of tomato and its products from India have been analyzed to find (i) production and export performance of tomatoes in India, (ii) impact of trade liberalization on export of tomato and its... more
The performance and competitiveness of export of tomato and its products from India have been analyzed to find (i) production and export performance of tomatoes in India, (ii) impact of trade liberalization on export of tomato and its products, (iii) major destinations of Indian tomato and tomato products, and (iv) determinants of tomato export. The export performance ratio (EPR) has
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Cowpea (Vigna anguiculta (L.) Walp.), which is commercially grown throughout India for its long green pods as a vegetable, for its seeds as pulse and for its foliage as fodder, is an important component of the farming system of the arid... more
Cowpea (Vigna anguiculta (L.) Walp.), which is commercially grown throughout India for its long green pods as a vegetable, for its seeds as pulse and for its foliage as fodder, is an important component of the farming system of the arid and humid tropics. Its cultivars grown for immature green pods are variously known as asparagus bean, snake bean or
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The performance, competitiveness, major destinations and determinants of cucumber and gherkin export from India have been studied. Export performance ratio has been used to estimate the competitiveness, and log linear type of demand... more
The performance, competitiveness, major destinations and determinants of cucumber and gherkin export from India have been studied. Export performance ratio has been used to estimate the competitiveness, and log linear type of demand function has been used to determine the export determinants. It has been observed that India has made tremendous progress in the export of cucumber and gherkin products
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Severe incidence of a mosaic disease was observed on summer squash (Cucurbita pepo), commonly called pepo, grown in Varanasi during June–September of Khariff season 2007. Symptoms observed were mosaic, puckering on the leaves, wartiness... more
Severe incidence of a mosaic disease was observed on summer squash (Cucurbita pepo), commonly called pepo, grown in Varanasi during June–September of Khariff season 2007. Symptoms observed were mosaic, puckering on the leaves, wartiness on fruits, general stunting of plants and low yield. PCR amplification with degenerate primers designed to target the conserved sequences of coat protein gene of whitefly
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Research Interests: Genetics, Microbiology, Geography, Genetic Drift, Gene Flow, and 20 morePopulation Genetics, Molecular Evolution, Medical Microbiology, Virology, Metagenomics, Food Security, Genetic Diversity, Phylogeny, Population structure, Genetic Structure, Cluster Analysis, Plants, Geographic distribution, Genotype, Genetic Recombination, Host Specificity, Genome sequence, Host Range, Large Scale, and Begomovirus
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In present study, an attempt has been made to assess the genetic diversity among 34 accessions of Benincasa hispida using quantitative traits and RAPD data. Variability was observed for characters like days to first female flower, fruit... more
In present study, an attempt has been made to assess the genetic diversity among 34 accessions of Benincasa hispida using quantitative traits and RAPD data. Variability was observed for characters like days to first female flower, fruit weight, equatorial and polar diameter. Cluster analysis based on quantitative traits revealed a high degree of diversity among the accessions. RAPD-based dendrogram showed dissimilarity values 0.64–0.943 suggesting that the accessions represent a genetically diverse population. A non-significant correlation was observed between the clustering based on quantitative traits and RAPD markers. But the accessions like IVAG-107 and IVAG-81 clearly separated from rest of the accessions based on the quantitative traits and as well as RAPD primers. Both the dendrogram revealed that the accessions from northeastern region of India are diverse from the accessions of other parts of India, as they cluster together in both the dendrogram. The information generated could be utilized in developing cultivars/hybrids for specific traits.
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Cruciferous vegetables can contribute to a healthy human diet. This may be due to the presence of the phytochemical glucosinolate. The sinigrin (2-propenyl glucosinolate) content and the myrosinase activity were estimated in edible... more
Cruciferous vegetables can contribute to a healthy human diet. This may be due to the presence of the phytochemical glucosinolate. The sinigrin (2-propenyl glucosinolate) content and the myrosinase activity were estimated in edible portions of five broccoli (B. oleraceaL. var. italicaPlenck), three white cabbage (B. oleraceavar. capitataL. f. alba1 DC), two each of Chinese cabbage [B. rapaL. subsp. pekinensis(Lour.) Olsson],
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Yellow vein mosaic disease of pumpkin (Cucurbita moschata) is a serious problem for the cultivation of pumpkin throughout India. Symptomatic samples collected from Varanasi region of North India showed mixed infection of the three... more
Yellow vein mosaic disease of pumpkin (Cucurbita moschata) is a serious problem for the cultivation of pumpkin throughout India. Symptomatic samples collected from Varanasi region of North India showed mixed infection of the three begomoviruses which could represent up to three species namely Tomato leaf curl New Delhi virus, Squash leaf curl China virus and Tomato leaf curl Palampur virus.
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Research Interests: Microbiology, Phytopathology, Molecular Evolution, Plant Biology, Pepper, and 12 moreChina, Multidisciplinary, Phylogeny, Plant diseases, Applied Environmental Microbiology, Indian, Phylogenetic analysis, Tomato, Molecular Characterization, Genetic Recombination, Begomovirus, and Lycopersicon esculentum
Cytoplasmic male sterility (CMS) is increasingly being utilized for hybrid seed production of hot pepper (Capsicum annuum). Two CMS specific sequenced characterized amplified regions (SCARs), viz., atp6607 and coxII708 developed elsewhere... more
Cytoplasmic male sterility (CMS) is increasingly being utilized for hybrid seed production of hot pepper (Capsicum annuum). Two CMS specific sequenced characterized amplified regions (SCARs), viz., atp6607 and coxII708 developed elsewhere were validated in an array of genotypes possessing male sterile (S-) and normal/male fertile (N-) cytoplasms and their feasible uses in CMS based pepper hybrid breeding have been elaborated. A set of eight maintainer and restorer inbreds were crossed on four CMS lines possessing two independently isolated and commercially utilized S-cytoplasms (Peterson's and Reddy's). Based on fertility restoration/maintenance reaction of 32 resulted F1s and on the presence of two SCARs (atp6607 and coxII708) in both the S-cytoplasms, it has been concluded that although two S-cytoplasms were isolated and commercially utilized independently, they are genetically same or similar. Through inter-specific hybridization between C. chacoense and C. annuum, a new alloplasmic S-cytoplasm in the genus Capsicum has been isolated and the CMS F1 has been advanced to CMS BC1F1.